DIYstompboxes.com

DIY Stompboxes => Building your own stompbox => Topic started by: markusw on June 13, 2006, 04:07:39 PM

Title: TZF Electric Mistress (sample and layout)
Post by: markusw on June 13, 2006, 04:07:39 PM
Since Mark Hammer mentioned that every Flanger can be converted to a TZF I thought I'll give theTZF Mistress a try. ;)
And I must say, it really sounds cool  8) Turning it back to normal Mistress gives you the strong feeling something is missing.
The clock trim pot is set to a fixed delay of about 4 ms. This way the TZF point is about in the middle of the LFO travel. Don't know whether the Mistress is the ideal Flanger to be converted to TZF but it's definitely worth a try.

One tiny drawback: there is a bit of "pseudo" clock" noise. It's not really problematic but I would like to know it's source. The weird thing is: the frequency of the "clock noise" (at least I initially thought it was clock noise) doesn't correspond to LFO. It sounds like it's  frequency is modulated but this modulation simply is completely different from the LFO "travel". Also interesting: this "pseudo" clock noise increases if nothing is connected to the input and with the input gnded noise it is gone. This noise hasn't got anything to do with the TZF board since it is also present if the TZF board is not connected to the main board. The level is just really low. Therefore I didn't realise so far that it's there.

In addition there is a bit of hiss once the TZF board is connected to the main board. Again, nothing dramatic but I don't know where it is derived from. The hiss is also present if the input is grounded, btw.

Do you think that one reason for these noises could be that the two boards are wired together with about 10 alligator wires and the whole mess isn't boxed yet??

Below the schems.

(http://img.photobucket.com/albums/v21/markusw/9VMistress.jpg)


The fixed delay:

(http://img.photobucket.com/albums/v21/markusw/9VMistressTZFboard.jpg)

I know there are some things that could be simplyfied, but hey... it works ;) E.g. the two boards both have their own PS filtering caps + Vref opamp (I just thought that having it this way might help to prevent noise). R12 (10R) is replaced by a jumper. Also C15 (15n) is not present.

Comments are highly appreciated. BTW, in case some one is interested I will try to put together a project file within the next days.

Regards,

Markus

Title: Re: TZF Electric Mistress
Post by: Mark Hammer on June 13, 2006, 04:38:35 PM
Do you think that one reason for these noises could be that the two boards are wired together with about 10 alligator wires and the whole mess isn't boxed yet??
Well, DUH!! :icon_lol:
A "classic" DMM has a switch for selecting between flanger and filter-matrix.  The filter matrix is essentially a fixed delay.  The DMM also has a separate dry and wet output.  If you have two DMM units, you can feed your guitar to the first one in filter matrix mode.  The clean-dry output of that goes to the second DMM and the fixed-delay wet output goes to a mixer.  The second DMM is set to flanger mode but you take the wet-only output and feed that to a second mixer input.

You now have a mixer with a fixed-delay signal, and a swept-delay signal.  Set the fixed delay on the first one "just right" and the second one will sweep ahead of the first one, producing TZF.

Is this any "better" in some way than what Markus has described?  Technically, no.  The practical advantage is that there are layouts available for the non-TZF DMM over at GGG (now THERE is an abbreviated mouthful!  :icon_lol: ), but there are no layouts available for a TZF version.....yet.  The other practical advantage is that at least *some* of the potential risk posed by "dueling clocks" is reduced by having them each in a nice shielded enclosure.  The disadvantage, obviously, is that you need a mixer, and you have to run patch cables.  Of course, one of the other neat things about having an outboard mixer is that you can produce a sum and difference mix of the fixed and swept delays.  The Line 6 Liqui-Flange does very nice stereo TZF, and having the TZF move around across two amps is little short of mesmerizing.  Stick a decent fuzz ahead of the flanger so you get lots of harmonic content to comb filter and its damn near paralyzing!

I salute your spirit of adventure, and commitment to this however.  I need a thumbs up emoticon here!
Title: Re: TZF Electric Mistress
Post by: markusw on June 13, 2006, 05:34:42 PM
Hey Mark,

thanks a lot for your explanations! :)

Quote
Well, DUH!!

OK, will put it in a box ;) Any idea what this pseudo clock noise might be derived from?

Re the dual DEM approach: isn't the wet signal of the DEM already a mix of dry and wet (i.e. notches are already present)? Now if you mix this wet signal (of a DEM e.g. in Flanger mode)  with the wet signal  of a DEM (in Matrix mode) that has notches too, wouldn't it sound different from just delaying the dry signal for a fixed time?

Regards,

Markus




Title: Re: TZF Electric Mistress
Post by: A.S.P. on June 13, 2006, 06:33:17 PM
quod licet iovi, non licet bovi  :icon_sad:
Title: Re: TZF Electric Mistress
Post by: Mark Hammer on June 13, 2006, 07:11:56 PM
I could have sworn I saw three jacks on the back of my buddy's pair of DEMs.  The schematic at GGG only shows one output jack, though, and none of the schems I have shows more than one output jack.  :icon_redface:  So, it may be issue-specific, OR I may simply have a memory flaw.  Apologies for any false alarms.

On the other hand, you can always re-direct the dry signal to an added output jack in one/both of them.
Title: Re: TZF Electric Mistress
Post by: A.S.P. on June 13, 2006, 07:22:02 PM
adding an inverted dry signal to a "wet" signal-mix of dry+delayed,
should subtract the dry,
and leave the delayed...
Title: Re: TZF Electric Mistress
Post by: Processaurus on June 13, 2006, 08:06:32 PM
Do you think that one reason for these noises could be that the two boards are wired together with about 10 alligator wires and the whole mess isn't boxed yet??

Yes :icon_biggrin:  Its a good sign that the noise goes away when you ground the input, that means its clock noise getting getting picked up the input wire, and getting in there because the guitar is a high impedance (low current) source and goes to a high impedance (sensitive to tiny current) input stage.  Grounding it makes a very low impedance source, so all the current the noise puts on the input wire can't compete.  I bet if you precede the dual mistress contraption with any buffered pedal, the noise will be reduced, because of the low output impedance of the buffer. 

Basically I'd re-route the input wire, or this may be a good opportunity to use a shielded cable, with the ground attached at one end. 

A while ago I had two small clones lashed together with a fistful of alligator clips to make a DC-2 kinda thing, and was suprised there wasn't any heterodyning whine from the clocks, given all the reading around here made me believe it was unavoidable.  I guess it was from having seperate power supply filtering for each board and some distance maybe?

Nice work by the way.
Title: Re: TZF Electric Mistress
Post by: RaceDriver205 on June 14, 2006, 01:19:04 AM
Sound samples, sound samples! Got to here this!  :icon_biggrin:
Title: Re: TZF Electric Mistress
Post by: markusw on June 14, 2006, 01:55:17 AM
Thanks for all your replies!

Quote
On the other hand, you can always re-direct the dry signal to an added output jack in one/both of them.

I think the DEM could be easily modded to remove the dry signal that is mixed to the  delayed (probably with a switch). So with this modded unit in Matrix mode your approach should be identical to to just delaying the dry signal, if understood everything correctly ;)

Quote
Yes   Its a good sign that the noise goes away when you ground the input, that means its clock noise getting getting picked up the input wire, and getting in there because the guitar is a high impedance (low current) source and goes to a high impedance (sensitive to tiny current) input stage.  Grounding it makes a very low impedance source, so all the current the noise puts on the input wire can't compete.  I bet if you precede the dual mistress contraption with any buffered pedal, the noise will be reduced, because of the low output impedance of the buffer.

Yup, putting a buffered box in front of the whole mess helps :) Thanks for the explanation! Will use shielded wire for the input and output once I put it in a box.


Quote
I guess it was from having seperate power supply filtering for each board and some distance maybe?

That's why I decided to have separate ps filtering for each board. I just wanted to reduce the chance of clocks interfering with each other. Basically, I'm sure that there are more elegant approaches but I'm not aware of any ;)

Still I don't have any idea why the frequency modulation of the "pseudo" clock noise I hear does not correlate with the LFO travel of the variable delay. Spooky ;) Any comments on this observation?



Sound samples, sound samples! Got to here this! :icon_biggrin:

Will try if I manage to find some time :)

Regards,

Markus

Title: Re: TZF Electric Mistress
Post by: markusw on June 14, 2006, 01:33:11 PM
Re noise:  I just put a Hammond box over the fixed delay board and this already clearly reduced noise although the wires to gnd and to the main board as well as the main board it self are still uncovered :-) Intentinally, moving audio signal wires towards the clock stages doesn't increase noise. Even putting the fixed delay board on top of the main board doesn't change anything. Therefore, I'm pretty sure that noise won't be an issue once the stuff is boxed :-)

I love playing CDs through the TZF Mistress. It's so nice to hear that swoosh over and over again :-)

Regards,

Markus
Title: Re: TZF Electric Mistress
Post by: nelson on June 14, 2006, 01:42:30 PM
Hi Markus

You could do all this with one IC if you used a PT2399, minimum delay time, I think, is 10ms though.

Title: Re: TZF Electric Mistress
Post by: markusw on June 14, 2006, 02:10:06 PM
Hi Markus

You could do all this with one IC if you used a PT2399, minimum delay time, I think, is 10ms though.



Hi Paul,

thanks for the hint! Didn't even think about this  :icon_redface:

On the other hand 10 ms might be too long. The Mistresses LFO travels from about 0,5 to about 10 ms maybe a little further. At 12.8 ms (if my calcs are correct) the VCO frequency reaches 20 kHz.  So the TZF point wouldn't be symmetric. Don't know if this would hurt though ;)

Markus


Title: Re: TZF Electric Mistress
Post by: Mark Hammer on June 14, 2006, 02:21:51 PM
From one vantage point, the PT2399 suggestion is smart.  If I've understood Ton/Puretube's comments about heterodyning with multiple clocks, it is chiefly a problem when the difference between two clocks (we'll assume their sum is out of hearing range and well filtered) falls in the audio range.  So, a fixed clock of 90khz, and a variable clock that ranges from 100khz to 10khz (as a plausible example), will have a point in the sweep when the difference between those two clocks is well within hearing range, and more importantly, well below the corner frequency of any onboard lowpass filters.  Given that the PT2399 and MN3x07 will have vastly different clock frequencies, that audible heterodyning is unlikely.

On the other hand, a 10ms latency for the straight signal would make this a psychologically difficult device to play through.  Not a problem for studio work necessarily, but definitely not the sort of thing you want to jam through.

Scott Stites (DIYFreque) has some followup discussion on his site, prompted by our discussion here, about symmetrical vs asymmetrical TZF.  he also has some samples.  It is well worth revisiting that content.
Title: Re: TZF Electric Mistress
Post by: nelson on June 14, 2006, 02:34:13 PM
A simpler and perhaps cheaper way to add the TZF option would be to use a CD4047 + MN3007 combo.

I just have a problem of using an SAD1024A as nothing more than a fixed delay.


I would def have the delay as a panel mounted control.




Title: Re: TZF Electric Mistress
Post by: StephenGiles on June 14, 2006, 03:10:36 PM
I saw this thread just as we were turning in last night and my printer went pear shaped. Then after work today we lost our internet connection which foxed me completely, because it was fine this afternoon. Before I kicked the modem, I unplugged it from the mains and replugged it in. Then it was fine. Now, this should be an interesting thread.

My question is how critical is it to use the same type of BBD for both the fixed and variable delay? Could we get a short enough delay from an MN3005 for the fixed delay if it was bufferred a la ADA Flanger mod by Mike Irwin? If so surely any noise generated would be less.

Must do some gardening - we have weeds up to 4 feet high!
Title: Re: TZF Electric Mistress
Post by: Mark Hammer on June 14, 2006, 03:27:44 PM
I saw this thread just as we were turning in last night and my printer went pear shaped. Then after work today we lost our internet connection which foxed me completely, because it was fine this afternoon. Before I kicked the modem, I unplugged it from the mains and replugged it in. Then it was fine. Now, this should be an interesting thread.

My question is how critical is it to use the same type of BBD for both the fixed and variable delay? Could we get a short enough delay from an MN3005 for the fixed delay if it was bufferred a la ADA Flanger mod by Mike Irwin? If so surely any noise generated would be less.

Must do some gardening - we have weeds up to 4 feet high!
Smart! (The BBD suggestion, not the "landscaping strategy")

For the baffled, what Steve is suggesting is that if the short fixed delay needed for TZF was achieved by "superclocking" a larger-capacity BBD (a 4096-stage MN3005, or maybe a 2048-stage BL3208, since they are more available), then the sum and difference of those two clocks would be well out of hearing range, and much less problematic or risky as far as heterodyning goes.
Title: Re: TZF Electric Mistress
Post by: markusw on June 14, 2006, 03:49:12 PM
Re the PT2399: if I understood the data sheet correctly, the minimum delay is around 30 ms with an external resistor from 0 to 500 ohm. So 30 ms would defintely be too long for live playing. Oscillator frequency would be around around 20M Hz though :o

Quote
Scott Stites (DIYFreque) has some followup discussion on his site, prompted by our discussion here, about symmetrical vs asymmetrical TZF.  he also has some samples.  It is well worth revisiting that content.

Thanks for the hint!  :)

Quote
A simpler and perhaps cheaper way to add the TZF option would be to use a CD4047 + MN3007 combo.

I just have a problem of using an SAD1024A as nothing more than a fixed delay.

I know it really hurts to use a second SAD for the fixed delay. But the "aim of the study" was to get a working TZF ;-) I m also sure that a lot of things could be simplified. Using another SAD just relieved me from redisigning the delay. Also I supposed that adding just another active 2-pole lp filter should be OK to suffiently reduce clock noise of the fixed delay to avoid this heterodyning thingy (if I understood correctly what Mark mentioned ;) )

Quote
I would def have the delay as a panel mounted control.

Already planned how to include the fourth pot on the panel ;-) Again some pot wiring...aargh. Anyway, don't think there is any box I built that ended up the way I initially planned it.


Quote
My question is how critical is it to use the same type of BBD for both the fixed and variable delay?


I don't know whether the SAD has any advantage over cheaper (in-production) BBDs. Does running the the two 512 stages in parallel like in the Mistress somehow improve sound (or decrease noise) when compared to a cheaper BBD? According to the data sheet running the two stages in "differential operation" allows the "most effiecient cacellation of clocking glitches". On the other hand the SAD might still be noisiser than e.g. a BL2307 ??

Quote
was achieved by "superclocking" a larger-capacity BBD

The MN3005 had to be run at 400 kHz to get down to 5 ms (specs say 100 kHz max). Would this be OK??


Markus

Title: Re: TZF Electric Mistress
Post by: StephenGiles on June 14, 2006, 04:21:03 PM
My back is suffering now!

Interesting answers. Another point that struck me is whether it is sensible to have analogue and digital delays together. Is it worth throwing caution to the wind to use a basic compandor here? I think there was a simple compandor in the ETI Playmate (not the magazine!!!) using an LM 13600, without going the more usual NE570/571 route.

Personally, I would be inclined to say stuff the noise, because the EM sound is unique in itself, and I would not want it to be watered down and sound like a Japanese flanger.
Title: Re: TZF Electric Mistress
Post by: Mark Hammer on June 14, 2006, 04:22:51 PM
I know it really hurts to use a second SAD for the fixed delay. But the "aim of the study" was to get a working TZF ;-) I m also sure that a lot of things could be simplified. Using another SAD just relieved me from redisigning the delay. Also I supposed that adding just another active 2-pole lp filter should be OK to suffiently reduce clock noise of the fixed delay to avoid this heterodyning thingy (if I understood correctly what Mark mentioned ;) )

Quote
I would def have the delay as a panel mounted control.

Already planned how to include the fourth pot on the panel ;-) Again some pot wiring...aargh. Anyway, don't think there is any box I built that ended up the way I initially planned it.


Quote
My question is how critical is it to use the same type of BBD for both the fixed and variable delay?


I don't know whether the SAD has any advantage over cheaper (in-production) BBDs. Does running the the two 512 stages in parallel like in the Mistress somehow improve sound (or decrease noise) when compared to a cheaper BBD? According to the data sheet running the two stages in "differential operation" allows the "most effiecient cacellation of clocking glitches". On the other hand the SAD might still be noisiser than e.g. a BL2307 ??

Quote
was achieved by "superclocking" a larger-capacity BBD

The MN3005 had to be run at 400 kHz to get down to 5 ms (specs say 100 kHz max). Would this be OK??

Markus
The specs on all the Matsushita chips are for an unbuffered MN310x clock driver into a Matsushita BBD.  The input capacitance of those BBDs is high enough that those nice crisp square-wave clock pulses from the MN3101/3102 get seriously rounded over a certain upper frequency boundary.  THAT's what the 100khz thing refers to.  Should the user/builder/designer include suitable buffering, however, that upper bound changes from that of the circuit in the Matsushita appnotes.  Mike Irwin told me he was able to get 2mhz clocking on an MN3007 without difficulty by providing suitable buffering of the clock lines to overcome that input capacitance.  The basic idea is to pump up the current drive of the clock signal.  A typical means of doing this is by paralleling 3 invertor sections and sticking them between the clock and the BBD, like what you see on the Hollis Ultraflanger.  There is nothing magical about '3'.  It's just an extension of the fact that more invertors and current drive is better, hex invertor chips have 6 invertors on them, and there are 2 clock lines to buffer.  Do the math. :icon_wink:

Datasheets for the MN3007 and MN3005 show input capacitances of 700pf and 2800pf, respectively (2800 = 4 x 700).  So let's say that the most an MN3007 could be sucessfully clocked to, with buffering, would be 2mhz.  Okay, divide by 4 to compensate for the extra capacitance,and we'll say that locking to 500khz with buffering should pose no great difficulty.

This is partly why I suggested the BL3208.  You can get BL3207 (1024-stage) and BL3208 (2048-stage) devices relatively inexpensively and superclocking the 2048-stage device should provide enough of a stagger in clock rates plus: a) short enough fixed delay, and b) decent sampling rate for the clean signal.  By being a smaller capacity chip, shorter delays should be easy to get.
Title: Re: TZF Electric Mistress
Post by: markusw on June 15, 2006, 03:27:47 AM
Mark, thanks a lot for this explanation!! Your answer definitely improved my knowledge of clocking BBDs a lot :)

Re assymetric versus symmetric TZF: personally I prefer to have the TZF points evenly distributed. However, moving the clock pot of the fixed delay to the pannel won't hurt for sure.

How does the SAD1024 compare to let's say BL3207 or BL3208 BBDs regarding clock noise??

Forgot to mention before: coupling caps and the 2-pole active lp filter I added for the fixed delay were designed to keep exactly the same frequency response (up to about 20 kHz) as for the "dry" signal in the Mistress. Don't know whether this is important though. I just wanted to change the frequency response of the Mistress as little as possible when switching to TZF.

Regards,

Markus
Title: Re: TZF Electric Mistress
Post by: markusw on June 15, 2006, 04:44:29 AM
For those of you who are not too distracted with pain ;) when investing a second SAD1024 here's a project file I put together for the TZF board.

http://www.diystompboxes.com/DIYFiles/up/TZF_Mistress_v11_project_file.pdf (http://www.diystompboxes.com/DIYFiles/up/TZF_Mistress_v11_project_file.pdf)

Will try to make some sound samples later.

Markus
Title: Re: TZF Electric Mistress
Post by: Geoff Hunter on June 15, 2006, 05:31:01 AM
Feel free to shoot me down on this one but.......

Could you make a short serial "delay" out of a

LM311 for comparing the input signal to Vcc/2 and outputting high/low
a CMOS CD4517 128 bit serial shift register clocked by high speed clock (~1Mhz) for clocking the shifter
R-C network to smooth it out? (sure you could get ~5-10ms delay out of this)

This is like a PWM delay?

I saw a website showing exactly this last year, but damnit I can't find it now.  :icon_mad:

EDIT- Found it! http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=8056 (http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=8056)
Title: Re: TZF Electric Mistress
Post by: Mark Hammer on June 15, 2006, 11:13:34 AM
Mark, thanks a lot for this explanation!! Your answer definitely improved my knowledge of clocking BBDs a lot :)

Re assymetric versus symmetric TZF: personally I prefer to have the TZF points evenly distributed. However, moving the clock pot of the fixed delay to the pannel won't hurt for sure.

How does the SAD1024 compare to let's say BL3207 or BL3208 BBDs regarding clock noise??

Forgot to mention before: coupling caps and the 2-pole active lp filter I added for the fixed delay were designed to keep exactly the same frequency response (up to about 20 kHz) as for the "dry" signal in the Mistress. Don't know whether this is important though. I just wanted to change the frequency response of the Mistress as little as possible when switching to TZF.

Regards,

Markus
Don't thank me.  Thank Mike Irwin.  I can only hope I am doing his vast expertise justice.
The SAD1024 tends to be found in flangers that can sweep pretty high (i.e., to very shot delays) because it was intended for video sampling/processing purposes too, which meant that it came ready to handle very high clock speeds without the fancy interventions needed by the Matsushita chips.  Fundamentally, it is not a "better" chip, merely more readily suited to certain applications.  There are probably spec differences in S/N ratio, etc. but these are always predicated on certain conditions of use so I wouldn't turn to them as the last word on relative noisiness of the chips themselves.

That being said, the ability to use it as two 512-stage sections in parallel (like the MN3010) permits somewhat quieter operation via use of noise-cancelling techniques.  The other thing is that if it was being used for higher clocking, the filtering requirements for keeping clock noise out of the audio path were more relaxed, so people associate it with greater bandwidth and less clock whine too.
Title: Re: TZF Electric Mistress
Post by: markusw on June 15, 2006, 02:02:16 PM
Feel free to shoot me down on this one but.......

Could you make a short serial "delay" out of a

LM311 for comparing the input signal to Vcc/2 and outputting high/low
a CMOS CD4517 128 bit serial shift register clocked by high speed clock (~1Mhz) for clocking the shifter
R-C network to smooth it out? (sure you could get ~5-10ms delay out of this)

This is like a PWM delay?

I saw a website showing exactly this last year, but damnit I can't find it now. :icon_mad:

EDIT- Found it! http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=8056 (http://www.elecdesign.com/Articles/Index.cfm?AD=1&ArticleID=8056)



Thanks a lot Geoff!! :) Unfortunately, I do not have the faintest idea how shift register works. Will require some reading :icon_redface:


Quote
Don't thank me.  Thank Mike Irwin.  I can only hope I am doing his vast expertise justice.


Thanks to Mike Irwin :) Still thanks to you Mark also for your clarification on BBD specs!

BTW,

here are the samples. Actually, it's just one plus a short one to give you an idea of the noise (done at exactly the same levels while recording as the real one).

http://www.diystompboxes.com/DIYFiles/up/wind_me_up.mp3 (http://www.diystompboxes.com/DIYFiles/up/wind_me_up.mp3)

5 ms fixed delay, Rate=0, Range=100%, feedback=0%

http://www.diystompboxes.com/DIYFiles/up/noise.mp3 (http://www.diystompboxes.com/DIYFiles/up/noise.mp3)

It's still wired with alligator wires and not boxed.

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Mark Hammer on June 15, 2006, 02:24:40 PM
I'm not hearing anything on the noise file but the "Wind Me Up" file is sweet and bang on what the unit ought to do.  Gotta love that through-zero point where just for an instant nothing feels coherent, and then everything seems to come back together. :icon_biggrin:
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on June 15, 2006, 02:34:19 PM
I'm not hearing anything on the noise file but the "Wind Me Up" file is sweet and bang on what the unit ought to do. Gotta love that through-zero point where just for an instant nothing feels coherent, and then everything seems to come back together. :icon_biggrin:

Ahm, it's just a little noise. Maybe I exaggertated a bit. ;)

Currently, I have the unit connected to my notebook while listening to mp3's. Simply love to hear that TZ point again and again....


Title: Re: TZF Electric Mistress (sample and layout)
Post by: StephenGiles on June 15, 2006, 02:46:13 PM
Forget the noise, it's nothing. Sounds very good indeed.
Title: Re: TZF Electric Mistress (sample and layout)
Post by: nelson on June 15, 2006, 03:16:51 PM
If thats the noise with breadboard and alligator clips please box this up in one 1590DD and call it one of the first true through zero flangers that is easy and sounds great.


Would someone trade me an SAD1024, I have lots of parts.......MN3005?

Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on June 16, 2006, 01:44:55 AM
Quote
If thats the noise with breadboard and alligator clips please box this up in one 1590DD and call it one of the first true through zero flangers that is easy and sounds great.

It's already two etched boards but the wiring is still with alligators :)

Quote
Would someone trade me an SAD1024, I have lots of parts.......MN3005?

Considering the price of the MN3005 and the SAD1024 I'd order the SAD1024 from Steve ;)

Regards,

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: RaceDriver205 on June 16, 2006, 04:33:48 AM
Oh, great. Now I have to build one of them too.  :icon_neutral:
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on June 16, 2006, 01:15:46 PM
Oh, great. Now I have to build one of them too. :icon_neutral:

Sorry ;)

Title: Re: TZF Electric Mistress (sample and layout)
Post by: RaceDriver205 on June 18, 2006, 10:56:16 PM
Its it an add-on board for the tonepad EM? Or the GGG one? Would it make any difference?
Thanks
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on June 19, 2006, 01:43:52 AM
Its it an add-on board for the tonepad EM? Or the GGG one? Would it make any difference?
Thanks


It's for the non-deluxe 9V version at tonepad with the layout in http://www.diystompboxes.com/smfforum/index.php?topic=44582.0 (http://www.diystompboxes.com/smfforum/index.php?topic=44582.0)

Maybe you can use it for the deluxe version at GGG too.

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: RaceDriver205 on July 19, 2006, 06:43:00 AM
Dont suppose you have/could do a sample with a guitar (distorted)?
This thing is 'broken ground' after all.
Cheers RD205
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on July 19, 2006, 11:33:05 AM
Dont suppose you have/could do a sample with a guitar (distorted)?
This thing is 'broken ground' after all.
Cheers RD205

Sorry, I don't have a guitar. Don't think that with bass the TZF point will be very interesting.

Regards,

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: RaceDriver205 on July 19, 2006, 08:41:58 PM
Really! You have 471 posts at DIYStompboxes.com and you don't have a guitar! :icon_eek:
Never mind then, its not a big problem.

So the idea of making a flanger through-zero is simply to apply a pre-delay at the input? Is that all you need to do? (2 new sad1024s is proving hard to justify  :icon_biggrin:)
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on July 20, 2006, 01:40:50 AM
Really! You have 471 posts at DIYStompboxes.com and you don't have a guitar! :icon_eek:
Never mind then, its not a big problem.

So the idea of making a flanger through-zero is simply to apply a pre-delay at the input? Is that all you need to do? (2 new sad1024s is proving hard to justify  :icon_biggrin:)

Yup, I just play bass guitar :)

It's not really a pre-delay at the input but a  fixed delay of the "dry signal" that gets mixed with the modulated delayed signal. That's it. But basically, as Mark Hammer mentioned several times you could stick in any fixed delay.
Alternatively, you could invert the LFO once and use the inverted LFO to drive the second delay (like with the DimC TZF mod).

Title: Re: TZF Electric Mistress (sample and layout)
Post by: RaceDriver205 on July 20, 2006, 02:01:55 AM
thanks markusw, ill look into that. Should be able to ge a cheaper delay than the sad1024, and apply it to my ultraflanger.
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on July 20, 2006, 02:17:22 AM
thanks markusw, ill look into that. Should be able to ge a cheaper delay than the sad1024, and apply it to my ultraflanger.

should work the same. to my knowledge it's just important to have the fixed delay line lp-filtered properly to avoid heterodyning. in case of the TZF Mistress I added an additional active 2-pole lp filter. after looking at the Ultra Flanger schem this is basically the same what John Hollis did for the variable delay. also it might be a good idea to have the ps for the fixed delay separated from the main board.

good luck :)

Title: Re: TZF Electric Mistress (sample and layout)
Post by: bwanasonic on July 20, 2006, 02:18:41 AM
Really! You have 471 posts at DIYStompboxes.com and you don't have a guitar! :icon_eek:

As a guitarist, I'm am prone to this same chauvinism, but it is always wise to keep in mind the "Big Picture" of FX users. I have plenty of old 4-tk tapes of *guitar free* material, using vintage *classic* effects (Thomas Organ Stereo Cry-Baby Fuzz/ Wah, EH Micro-Synth, Ibanez CS-505 chorus) on drum machines, harmonicas, Casio keybords, etc.

Kerry M
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on September 07, 2006, 07:50:07 AM
For those willing to invest a second SAD here's the updated link

http://www.aronnelson.com/DIYFiles/up/TZF_Mistress_v11_project_file.pdf (http://www.aronnelson.com/DIYFiles/up/TZF_Mistress_v11_project_file.pdf)

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Dave_B on September 26, 2006, 10:15:00 PM
For those willing to invest a second SAD here's the updated link
Thanks, Markus.  Do you still have the mp3's?
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on September 27, 2006, 03:51:59 AM
For those willing to invest a second SAD here's the updated link
Thanks, Markus.  Do you still have the mp3's?

Yup, they are here

http://www.aronnelson.com/DIYFiles/up/wind_me_up.mp3 (http://www.aronnelson.com/DIYFiles/up/wind_me_up.mp3)

http://www.aronnelson.com/DIYFiles/up/noise.mp3 (http://www.aronnelson.com/DIYFiles/up/noise.mp3)

BTW, forget about the noise. Since I put it in a box it's absolutely quiet.

Markus

Title: Re: TZF Electric Mistress (sample and layout)
Post by: Pierre on August 29, 2007, 02:33:47 PM
hi !!!
I'm re floating this tread with a couple of questions...
I'm planing to build the TZF board (i allready made 2 pcb's for this project) and i have a little concern about IC 45580...it seems that i can't find this particular chip anywhere...can i replace it with another chip..? I tried to get the datasheet without success so i really don't know nothing about this IC...
Another question is: is it possible to use this TZF board in my A/DA flanger clone...?

Thank you !!!
Pierre
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on August 29, 2007, 03:30:31 PM
hi !!!
I'm re floating this tread with a couple of questions...
I'm planing to build the TZF board (i allready made 2 pcb's for this project) and i have a little concern about IC 45580...it seems that i can't find this particular chip anywhere...can i replace it with another chip..? I tried to get the datasheet without success so i really don't know nothing about this IC...
Another question is: is it possible to use this TZF board in my A/DA flanger clone...?

Thank you !!!
Pierre



4558O is just a 4558. The O is from the package name in Eagle. Sorry  ;)
Finally,  I went with a NE5532. It doesn't make a real difference though, I just somehow like 5532's...

Markus
 
Title: Re: TZF Electric Mistress (sample and layout)
Post by: QSQCaito on August 29, 2007, 04:40:05 PM
Is good you reborn this ;). I have a doubt, you still have your normal flange if you want? Is it worth doing it. And last, can it be done with the deluxe version?


Thanks a lot

bye bye

DAC
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Pierre on August 29, 2007, 05:03:05 PM
thank you Markus...
I can't wait to put both projects together, i pretty much have all components for your 9V Electric Mistress and the TZF board...and definitively I'll give it a try in my A/DA...
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Dagreb on August 29, 2007, 10:50:37 PM
Mark Hammer said:
Quote
The Line 6 Liqui-Flange does very nice stereo TZF, and having the TZF move around across two amps is little short of mesmerizing.  Stick a decent fuzz ahead of the flanger so you get lots of harmonic content to comb filter and its damn near paralyzing

Dagreb says:Good to know. The TZF project is beyond me, so....y'know
Title: Re: TZF Electric Mistress
Post by: Dagreb on August 29, 2007, 10:53:16 PM
i'm a doofus. had to edit my post......
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on August 30, 2007, 05:48:13 AM
thank you Markus...
I can't wait to put both projects together, i pretty much have all components for your 9V Electric Mistress and the TZF board...and definitively I'll give it a try in my A/DA...

After heaving read puretube's "guidelines" on  having two separate delay lines in http://www.diystompboxes.com/smfforum/index.php?topic=25380.msg166584#msg166584 (http://www.diystompboxes.com/smfforum/index.php?topic=25380.msg166584#msg166584) I now would design the TZF add-on board differently.
Although I didn't notice in the first tests there is a bit of clock noise when the TZF board is switched in.
So it might be a good idea to at least filter the signal going into the second SAD1024. One could e.g. simply duplicate the output filter stage of the TZF add-on board and put it in front of the SAD's input.

Re ADA: I really like the ADA as it is because it's damn close to TZF, especially if you run the clock a bit higher. Also I would be afraid to introduce some clock noise into a really quiet circuit. So in case of the ADA I would go for an external fixed delay.

BTW, recently we compared an original deluxe Mistress with my DIY 9V Mistress. While the sound of those two units is a matter of taste we got serious clock noise when we put the Deluxe in front of the 9V Mistress even when the deluxe was in bypass. So obviously there is some clock noise emitted from the deluxe Mistress that casues heterodyning in combination with my 9V Mistress (this was independent of TZF).

 

Regards,

Markus


Title: Re: TZF Electric Mistress (sample and layout)
Post by: Ry on September 01, 2007, 11:25:21 AM
Quote
I really like the ADA as it is because it's damn close to TZF, especially if you run the clock a bit higher

What did you do to run the clock higher on the ADA, change the cap values?  I can dig through the ADA flanger thread if you documented it there, but I was hoping you would remember quickly.

I'm still not entirely happy with the clock on mine.

Ry
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Pierre on September 01, 2007, 01:56:57 PM
Quote
After heaving read puretube's "guidelines" on  having two separate delay lines in http://www.diystompboxes.com/smfforum/index.php?topic=25380.msg166584#msg166584 (http://www.diystompboxes.com/smfforum/index.php?topic=25380.msg166584#msg166584) I now would design the TZF add-on board differently.
Although I didn't notice in the first tests there is a bit of clock noise when the TZF board is switched in.
So it might be a good idea to at least filter the signal going into the second SAD1024. One could e.g. simply duplicate the output filter stage of the TZF add-on board and put it in front of the SAD's input.

...having the TZF PCB allready done (and a couple of spare SAD1024's) do you think is still worth to give it try..?
One more question :
where should i connect the "bypass" pad in your Mistress project...? (this is maybe a dumb question... :icon_redface:)...
Thank you !!!
Title: Re: TZF Electric Mistress (sample and layout)
Post by: StephenGiles on September 01, 2007, 02:03:20 PM
Quote
I really like the ADA as it is because it's damn close to TZF, especially if you run the clock a bit higher

What did you do to run the clock higher on the ADA, change the cap values?  I can dig through the ADA flanger thread if you documented it there, but I was hoping you would remember quickly.

Look at the circuit and see how the clock is bufferred - that is the trick.

I'm still not entirely happy with the clock on mine.

Ry
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Ry on September 01, 2007, 05:54:57 PM
Quote
Look at the circuit and see how the clock is bufferred - that is the trick.

Ah, so I assume that you mean change the values of the resistors on either side of T4, the 'Max Clock' trimmer to allow more voltage into the op amp buffer before the 4007?  Or is it something downstream of this?

I should just dig through the huge ADA flanger thread and make a useable FAQ out of it, I suppose.

Thanks,

Ry
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Branimir on September 01, 2007, 06:40:52 PM
Sorry for the off topic, I've tried searching the forums for the answer, but what does TZF means?
Title: Re: TZF Electric Mistress (sample and layout)
Post by: QSQCaito on September 01, 2007, 09:47:57 PM
Through Zero Flanging. I think.
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on September 02, 2007, 04:02:43 AM
Quote
I really like the ADA as it is because it's damn close to TZF, especially if you run the clock a bit higher

What did you do to run the clock higher on the ADA, change the cap values?  I can dig through the ADA flanger thread if you documented it there, but I was hoping you would remember quickly.

I'm still not entirely happy with the clock on mine.

Ry

In my build I used for  C29 47p plus 1M for R69. This might allow for higher clock frequencies. However, I believe it should be also possible with the 39p/2M2 combination.
Basically, you should be able to acchieve higher clock frequencies by tweaking T4 (max %^&* trim) and T5 (clock range).
First I checked the available frequency range with a frequency counter. Max clock frequency IIRC was around 4 MHz (measured at the SAD). Then adjusted it by ear and found that I liked it best if the clock went up to about 2,5 MHz.

Hope this helps.

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on September 02, 2007, 04:11:53 AM

...having the TZF PCB allready done (and a couple of spare SAD1024's) do you think is still worth to give it try..?
One more question :
where should i connect the "bypass" pad in your Mistress project...? (this is maybe a dumb question... :icon_redface:)...
Thank you !!!


If you already have the PCB I think it's defintely worth a try. With the switch you can always switch to non-TZF for comparison.
If clock noise is too much you can still remove the TZF PCB or add a filter to it's input to see if this improves the situation.
Maybe first check it out without the TZF board and once you know how it sounds mod it for TZF. This way you know about noise levels without modification.

The bypass pad is for non-true bypass.

Regards,

Markus
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Pierre on September 02, 2007, 04:52:31 AM
I was thinking...what if I put the TZF board in a separate enclosure, will this attenuate some of the noise..? :icon_rolleyes:
Title: Re: TZF Electric Mistress (sample and layout)
Post by: markusw on September 02, 2007, 05:01:12 AM
I was thinking...what if I put the TZF board in a separate enclosure, will this attenuate some of the noise..? :icon_rolleyes:

This is probably a good idea! You could replace the Clock trim pot with a panel mount pot.
Also there will be more space for modding the TZF board  ;)
Title: Re: TZF Electric Mistress (sample and layout)
Post by: Ry on September 02, 2007, 07:48:55 PM
Thanks!  That's exactly what I wanted to know.  I will play with the trimmers for a while and see what I do first.

Ry