The Worlsd smallest flangers....

[gigimarga]

Thx a lot solderman!
I will try all the tests that you said...the strangest thing is that odd/even switch...I can't understand why it actys so strange
The trace from Q1 under R29 is cutted from the beginning...

[gigimarga]

I have a pulsating voltage around 5V at pin 7 of IC1

[gigimarga]

I lost another 3 hours to debug it, with no great luck.
What I did:

1. I relinked the J201 with R36/R37 (I thought that the 1M resistor is important for the bias of IC1) and the strong noise that I had before was gone ...anyway, the thresold pot doesn't seems to do something very serious
2. After that I was able to hear a very weak flanger-ish signal "behind" the dry signal (the same sound you can obtain with a BF-2 into an amp at a high volume and no guitar in the input of BF-2)...so I think that the LFO it's working...this sound can be altered using Speed/Manual/Depth/Enhance pots
3. With the Speed at maximum (or very close to) I can hear a very clear (and enough loud) "detuned chorus"-like sound...and I was able to identify it: it's the same sound that you can obtain disconnecting the dry signal from a chorus/phaser (I never built a flanger before, only choruses/phasers) ...let's say it's a "vibrato" sound...it's OK now to assume that MN3007 it's working (it's the only one that I have)?

Anyway, for my last try to debug it, can you solderman please tell me what I must to hear at the outputs of the opamps?

I made some tests and that's what I obtained:

0. all op-amps and MN3007 are OK (tested in clones of MXR Distortion+/Small Clone)
1. pins 1 and 7 of IC1: a strong clear dry signal
2. pins 8 and 14 of IC1: a strong distorsed signal
3. pins 1 and 7 of IC3: a strong clear/distorsed signal
4. pin 3 of BBD: a strong clear signal
5. pins 7/8 of BBD: a strong distorsed signal (with the Bias trimpot maximized)
6. pin 7 of IC4 (2b-2c): a strong signal (I don't remeber if it was clear or distorsed)
7. pin 1 of IC4 (2b-2c): a weak whistle signal (maybe this is a problem...)

Thank you very much!

[gigimarga]

Another tests...and now it sounds like an alarm/machine gun/reverb with the odd/even switch on  ...I think I must to recheck all 

[solderman]

I lost another 3 hours to debug it, with no great luck.
What I did:

1. I relinked the J201 with R36/R37 (I thought that the 1M resistor is important for the bias of IC1) and the strong noise that I had before was gone ...anyway, the thresold pot doesn't seems to do something very serious
2. After that I was able to hear a very weak flanger-ish signal "behind" the dry signal (the same sound you can obtain with a BF-2 into an amp at a high volume and no guitar in the input of BF-2)...so I think that the LFO it's working...this sound can be altered using Speed/Manual/Depth/Enhance pots
3. With the Speed at maximum (or very close to) I can hear a very clear (and enough loud) "detuned chorus"-like sound...and I was able to identify it: it's the same sound that you can obtain disconnecting the dry signal from a chorus/phaser (I never built a flanger before, only choruses/phasers) ...let's say it's a "vibrato" sound...it's OK now to assume that MN3007 it's working (it's the only one that I have)?

Anyway, for my last try to debug it, can you solderman please tell me what I must to hear at the outputs of the opamps?

I made some tests and that's what I obtained:

0. all op-amps and MN3007 are OK (tested in clones of MXR Distortion+/Small Clone)
1. pins 1 and 7 of IC1: a strong clear dry signal
2. pins 8 and 14 of IC1: a strong distorsed signal
3. pins 1 and 7 of IC3: a strong clear/distorsed signal
4. pin 3 of BBD: a strong clear signal
5. pins 7/8 of BBD: a strong distorsed signal (with the Bias trimpot maximized)
6. pin 7 of IC4 (2b-2c): a strong signal (I don't remeber if it was clear or distorsed)
7. pin 1 of IC4 (2b-2c): a weak whistle signal (maybe this is a problem...)

Thank you very much!

This sound OK
I think you have to sort out the odd/ even thing. It seams that you have a error some vere there

[gigimarga]

Thank you solderman!

Now it auto-oscillates like crazy when I alter the Enhance pot and trimpot, but when the odd/even switch is on!
Can you help me with some voltages around thresold/enhance/even/odd part and/or can you tell me what I must to have at the outputs of the op-amps/BBD?

Million thanks again!

[gigimarga]

Between NE5532, TL072, RC4558 and LM833, which are the most suitable op-amps for ADA Flanger?

[solderman]

Thank you solderman!

Now it auto-oscillates like crazy when I alter the Enhance pot and trimpot, but when the odd/even switch is on!
Can you help me with some voltages around thresold/enhance/even/odd part and/or can you tell me what I must to have at the outputs of the op-amps/BBD?

Million thanks again!

Sorry Mine is at a frien but chech voltage in erlier posts. I used TL 072 for dual and LM324 for 4X

[gigimarga]

OK...thx again

[gigimarga]

I've made another tries to debug it, but with no luck, so I'm waiting for someone to post some good voltages...

Thank you all!

[Puguglybonehead]

The FL3 looks like it would be a good candidate for a through-zero mod. I quite like the sound of it, from the samples posted. I'm pretty lost with building anything more complicated than a fuzz, but I was wondering about doing a version of this flanger as an expression pedal? (eliminating the LFO) I have always wanted a footpedal-controlled flange, after trying a foot-controlled phase pedal back in the mid `70s.
That, and I'd like to add a second board, to achieve TZF. What part of the FL3 schematic can I omit to lose the LFO portion? I'm a bit lost, looking at it.

[solderman]

Everything surrounding U5 is LFO territory

[gigimarga]

Sorry solderman for bothering you again, but can you help me little posting some voltages?

Thank you million times!

[solderman]

Hi
No problem the only problem is that the thing still is at my friens.

By your description I don't think that you are far from the sulotion. Try to cut out the Threshold part and check the area around the od/even There are voltage for the BBD some pages back in this thread
 

[gigimarga]

Hi
No problem the only problem is that the thing still is at my friens.

By your description I don't think that you are far from the sulotion. Try to cut out the Threshold part and check the area around the od/even There are voltage for the BBD some pages back in this thread
 

The voltages for the BBD are close to the ones posted in this topic
I think that the problem is the Enhance part...but without the Thresold part it sounds horrible. I think that the 1M resitor between source and drain of the FET influences the bias of the opamp above.

Thank you very much again!

[solderman]

Check This

Dave has posted Voltage of a working unit although its a different layout the cicuit is tha same so the voltage will be tha same as long as you can indentify the correct pin.

http://www.diystompboxes.com/smfforum/index.php?topic=74367.msg710840#msg710840

[Mark Hammer]

Between NE5532, TL072, RC4558 and LM833, which are the most suitable op-amps for ADA Flanger?

For which portion of the circuit?  NE5532/LM833 provide less noise when used with smaller-value input/feedback resistances.  TL072 provide less noise when used with higher values.  NE5532/LM833 good for delivering lots of current where needed, but susceptible to ticking when used on LFO.

[gigimarga]

Between NE5532, TL072, RC4558 and LM833, which are the most suitable op-amps for ADA Flanger?

For which portion of the circuit?  NE5532/LM833 provide less noise when used with smaller-value input/feedback resistances.  TL072 provide less noise when used with higher values.  NE5532/LM833 good for delivering lots of current where needed, but susceptible to ticking when used on LFO.

Thank you Mark!
I asked about IC2 from the audio part, but solderman said that it's a TL072

[gigimarga]

I copied this post from the thread "MN3007 ADA Flanger clone" to avoid confusions and to keep all the thing clean!

Hello oldschoolanalog,

I had a break at my job, so I had sometime to measure the voltages on my ADA clone...and it's a disaster!
The main problem was/is that I built using solderman's layout:
1. Audio: http://solderman.fatabur.se/ada/ADA%20Audio.jpg
2. LFO: http://solderman.fatabur.se/ada/ADA%20LFO.jpg
3. PSU: http://solderman.fatabur.se/ada/ADA%20%20PSU.jpg

He made some mods on the ICs and I am not sure if I understood what he did,  so I post my voltages as in his layout:

MN3007
1. 14.65
2.  7.05
3.  8.60
4.   0.90   
5.  0.00
6.  7.05
7.  7.63
8.  7.66

CD4007
10. 5.66
11. 7.33
12. 0.09
14. 14.35

CD4047
1. 14.05
2.  0.09
3.  7.37
4. 14.05   
5. 14.05
6. 14.05
7.  0.00
8.  0.00
9.  0.00
10.  7.05
11.  7.05
12.  0.00
13. 14.08
14. 14.20

CD4049
All seems as yours, with the only difference that pin 16 is NC on solderman's layout.

IC1 from the LFO part
1.  5.00 - 8.15
2.  7.35
3.  7.00 - 9.70
4. 13.70   
5.  6.80
6.  6.70
7.  8.10 - 11.00
8. 12.40
9.  4.00
10. 10.00
11.  0.00
12. 13.50   
13. 12.30
14. 12.30

IC2 from the LFO part
1.  5.50
2.  6.90
3.  6.90
4.   0.00   
5.  6.80
6.  6.80
7.  6.80
8. 13.60

IC1 from the AUDIO part
1.  8.50
2.  8.50
3.  8.50
4. 14.10   
5.  7.50 - 8.10
6.  8.00 - 9.30
7.  7.00 - 9.80
8.  8.80 - 10.00
9.  8.80 - 10.00
10.  3.64
11.  0.00
12. 7.10 - 7.60   
13. 12.40
14. 12.40

IC2 from the AUDIO part
1.  NC
2.  NC
3.  NC
4.   0.00   
5.  7.14
6.  8.80 - 10.00
7.  8.80 - 10.00
8. 14.35

IC3 A-B from the AUDIO part
1.  9.00 -  9.80
2.  9.00 - 10.00
3.  8.80 - 10.00
4.   0.00   
5.  9.00 - 10.00
6.  8.00 -  8.80
7.  8.80 - 10.00
8. 14.30

IC4 2b-2c from the AUDIO part
1.  8.40 - 10.00
2.  8.40 - 10.00
3.  8.40 - 10.00
4.   0.00   
5.  8.40 - 10.00
6.  8.40 - 10.00
7.  8.40 - 10.00
8. 14.30

I don't have many expectations to debug it, but I give it a try!

Thank you very very very much oldschoolanalog!

[gigimarga]

I copied this post of oldschoolanalog from the thread "MN3007 ADA Flanger clone" to avoid confusions and to keep all the thing clean!

OK, first things first.
1: Would somebody/anybody please take the schematic this is based on (Charlie's) and relabel all the IC's & pin #'s (where applicable) to match the solderman layout designations? I'm sorry, but I don't have the time to rev. engineer the layout into schematic form. Having a properly designated schematic would go a long way to assist troubleshooting. Thank You.
2: IC2 Audio board. Pins 1, 2 & 3 should not be left floating. That op amp should be disabled. (Use the search function )
3: To avoid mass confusion at a later date I respectfully request that the troubleshooting posts for the solderman unit in this thread be moved to the "Worlsd Smallest Flangers" thread. Nice to keep all the info in it's proper place. Plus, there is already some good troubleshooting info there.
The good news (without knowing how your controls are set) is your 4007, 4047, 4049 & 3007 are all within an acceptable range as compared to a working unit.
The bad news is I started to get a headache and had to stop for now. (See #1 above)
I'll have another go at it tomorrow.
All the Best!