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DIYstompboxes.com  |  DIY Stompboxes  |  Building your own stompbox  |  New at runoffgroove.com: Tri-Vibe teknoman2 and 1 Guest are viewing this topic. « previous next »
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Author Topic: New at runoffgroove.com: Tri-Vibe  (Read 78738 times)
WhenBoredomPeaks
Posts: 296


Re: New at runoffgroove.com: Tri-Vibe
« Reply #100 on: January 05, 2010, 04:15:49 PM »

Very nice

Expect a vero layout shortly Smiley


mmm, vero, i like it much more than perf.
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compuwade
Posts: 191


WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #101 on: January 05, 2010, 06:04:31 PM »

Very very nice project. Great sound and probably one of the best ROG projects yet!! I can't wait to give this a try.

Thanks for all your hard work!!

-Wade
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slacker
Posts: 5508

Ian M. - England


Re: New at runoffgroove.com: Tri-Vibe
« Reply #102 on: January 06, 2010, 02:11:54 PM »

I've done a vero layout, it's here if anyone's interested.

http://www.aronnelson.com/gallery/main.php/v/slackers-stuff/trivibeboardfinal.jpg.html?g2_imageViewsIndex=1

I haven't built it yet so it's unverified but I've double checked it and I don't think there's any errors. I used a TL064 instead of a pair of TL062s because it made the layout a bit simpler, note that it's upside down compared to the other ICs. The layout might be a bit tight in places especially round the 10uF capacitors in the LFO, but the rest of it should be OK so long as you use sensible sized caps.
If I get time I'll try and build it at the weekend.
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svstee
Posts: 556


Sean V.- Bakersfield, California


Re: New at runoffgroove.com: Tri-Vibe
« Reply #103 on: January 06, 2010, 03:03:37 PM »

If you think it look good I'll try it this afternoon.

Thanks for the vero!
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doc_drop
Posts: 247



WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #104 on: January 06, 2010, 04:44:01 PM »

I breadboarded this puppy with an LM13700 yesterday. It worked great for a couple of minutes, once I managed to keep all the leads from touching.  Tongue It was definitely the most complicated thing I have attempted to breadboard. If I do something like that again I will put shrink wrap on any of the leads that risk crossing.

I did wind up replacing the TL072 with an NE5532. I don't know why, but making that change has made both this circuit and a Nurse Quacky I built last week work much better. Anyone have a theory?

Anyway, since I really liked what I heard while it was working, and I don't have a true vibrato circuit in my collection, I started doing the perf layout they recently posted this morning. I'll let you guys know how it goes once I finish. For the time being I am doing my best to emulate our buddy Freq Central...Uh, it just isn't coming out as neat as his work. But I am checking as I go, and so far so good.
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Ben N
Posts: 3357

Ben N. - really! Now Israel, once Baltimore


Re: New at runoffgroove.com: Tri-Vibe
« Reply #105 on: January 07, 2010, 06:04:35 AM »

I did wind up replacing the TL072 with an NE5532. I don't know why, but making that change has made both this circuit and a Nurse Quacky I built last week work much better. Anyone have a theory?
Was there something buffering your input?
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doc_drop
Posts: 247



WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #106 on: January 07, 2010, 02:57:18 PM »

Nope. No buffer. Guitar to circuit to bench amp. Does the NE5532 work better with buffered inputs?
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Ben N
Posts: 3357

Ben N. - really! Now Israel, once Baltimore


Re: New at runoffgroove.com: Tri-Vibe
« Reply #107 on: January 07, 2010, 06:20:45 PM »

Generally, yes. It has a low input impedance, and it loses its noise advantage when fed a high impedance signal. But, you know, lo-Z-in can sometimes be a good thing, in terms of taming harshness, etc. So if the 072 was too right or something was getting saturated in the circuit with it, the 5532 may be just the ticket. Did you try any other BJT-input opamps?
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doc_drop
Posts: 247



WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #108 on: January 07, 2010, 06:30:00 PM »

To tell the truth, breadboarding this created such a rats nest that my issues may have been caused more by that than the op amp. I am about 1/2 through perfing it up, and I am using sockets for the op amps, so I will be able to experiment more scientifically in a few days. I will post my results once I have them. I didn't try any other op amps, but I will once I have it put together, just out of curiosity.

But, it was a night and day difference with my Nurse Quacky. With the TL072 there was no envelope sweep at all. With the NE5532, it has a sweet resonant sweep. I got the idea from another post on here, so I am not alone in having that experience. I was surprised since I have read claims that the op amp doesn't make that much of a difference, but in certain circuits it definitely does.
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maximee
Posts: 193



Re: New at runoffgroove.com: Tri-Vibe
« Reply #109 on: January 08, 2010, 06:36:47 PM »

i'm almost done with the build on perf, but i'm still waiting for some parts in the mail to be able to finish it. man, that was a pain to do on perf. i'll post pictures as soon as i have it working Smiley
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El Heisenberg
Posts: 833



Re: New at runoffgroove.com: Tri-Vibe
« Reply #110 on: January 08, 2010, 06:43:29 PM »

Yes ive noticed op amps make certain circuits actually work, when some that should operate fine, don't. In Dr. Quack, the NE5532 did sound much different. However, in my MXR noise gate, it wouldn't work with a NE5532, any that I tried. Only with a TL072.
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"Your meth is good, Jesse. As good as mine."
doc_drop
Posts: 247



WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #111 on: January 08, 2010, 07:12:10 PM »

Maximee,

No kidding. I've been at it for a few hours, and I'm barely 1/2 done. And I am a pretty capable perf dude. But, since it is quite complicated, I am taking my time and doing continuity testing as I go to try to make sure I don't screw anything up. (Of course that would never happen!) Hopefully I'll have a working circuit by the end of the weekend. And hopefully you will as well once you get the parts.

El Heisendberg,

Interesting. I am definitely going to make sure I try several op amps with any build I am having problems trouble shooting. Luckily I have a little stock pile of the usual suspects now...
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maximee
Posts: 193



Re: New at runoffgroove.com: Tri-Vibe
« Reply #112 on: January 09, 2010, 08:23:47 AM »

To get this far took me about 6 hours. I also triple check every connection cause this beast is going to be a pain to debug.
That's how it's looking so far. It's my 3rd perf build, so let's hope it all works out Smiley





I don't know how you guys do it, but during my last build (professor tweed) i found it really helpful to have the layout loaded in photoshop and draw along while soldering. that way i have 2 or 3 layers on top of the layout where i draw in missing parts, substituted values or areas where there may be a problem later. really helpful to not get lost!


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rocklander
Posts: 46


Re: New at runoffgroove.com: Tri-Vibe
« Reply #113 on: January 10, 2010, 01:28:28 AM »

Here's my PCB design and partslayout for the runoffgroove Tri-Vibe:


Hi there. just etched this, and was starting to populate it when I noticed what I think are indescrepencies between the layout and the schem.
(u4=lm13600)
in the layout on u4 pin 5 goes to a 1n5F cap, but in the schem it's pin 8 that goes to the 1n5F
in the layout on u4 pin 8 goes to a 1uF cap, but in the schem it's pin 9 that goes to the 1uF
in the layout on u4 pins 10+12 go to a 22nF cap, but in the schem it's pins 5+7 that go to the 1uF


does it matter that they're different and has the layout been verified and tried? TIA
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Andre
Posts: 329


André Schaap, Netherlands


WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #114 on: January 10, 2010, 03:54:15 AM »

Because of PCB design reasons I changed the order of the 2 OTA's in the LM13600.
The layout has been verified by me and at least one other forum member.
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rocklander
Posts: 46


Re: New at runoffgroove.com: Tri-Vibe
« Reply #115 on: January 10, 2010, 03:58:10 AM »

Because of PCB design reasons I changed the order of the 2 OTA's in the LM13600.
The layout has been verified by me and at least one other forum member.

awesome.. I hoped it was the case (I haven't a real clue what I'm doing, just soldering by numbers ;-).
thanks for that  will continue as per the layout. icon_biggrin
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Jered
Posts: 667


Re: New at runoffgroove.com: Tri-Vibe
« Reply #116 on: January 11, 2010, 08:17:57 AM »

  Finished and boxed up my Tri Vibe last night using Andre's layout. Sounds great! Thanks ROG/Andre. Very well thought out. With no need to adjust/tweek voltages to get it working properly makes this thing a breeze.
  Thanks guys.
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rocklander
Posts: 46


Re: New at runoffgroove.com: Tri-Vibe
« Reply #117 on: January 12, 2010, 04:16:53 AM »

+1. just finished populating mine with equivalent parts (lm324 and lm358) and it's awesome!
just waiting for parts (right opamps and pot) and I'll houe htis up to take pride of place on my board. nice stuff ROG/Andre! icon_cool
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Ben N
Posts: 3357

Ben N. - really! Now Israel, once Baltimore


Re: New at runoffgroove.com: Tri-Vibe
« Reply #118 on: January 12, 2010, 06:22:13 AM »

But, it was a night and day difference with my Nurse Quacky. With the TL072 there was no envelope sweep at all. With the NE5532, it has a sweet resonant sweep. I got the idea from another post on here, so I am not alone in having that experience. I was surprised since I have read claims that the op amp doesn't make that much of a difference, but in certain circuits it definitely does.
I'm not looking at the schematic of either effect right now (working, so I might as soon open porn as a schematic...), but the other big difference between a TL072 and an NE5532 besides input-Z and noise (sometimes) is z-out. The 5532 has a very low z-out, so much so that it can be used as an audio amp to drive, say, headphones. Most opamps can't even think of doing that. So, depending on what the load is that they are driving, that may be the difference in certain effects. The claims that you read concerning opamps not making much difference were probably about distortion effects, where the effect may be a function pretty much entirely of the circuit design, e.g. clipping diodes and e.q. elements, and the the opamp is pretty much there just to amplify within a very restricted part of its frequency and gain ranges, and where the in/out functions may be handled by other devices, such as the buffers in a Tubescreamer. But I doubt anyone with a clue would say that as a blanket statement. 
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doc_drop
Posts: 247



WWW
Re: New at runoffgroove.com: Tri-Vibe
« Reply #119 on: January 12, 2010, 11:36:55 AM »

Alright, scratch the previous info. I finally finished perfing this guy up, and I am having some strange issues. But, it is working best with the TL062's and the TL072 as spec'ed by ROG. But, it is doing some strange things. Instead of a nice steady pulse, I get a volume dip when I first hit the strings, then an uneven and very light vibrato effect. The only things I did differently are I used an LM1700 instead of the LM1600, I used a film cap for one of the 1uF caps since it is shown that way in the schematic, but not on the perf layout, and I figured a big fatty would add to the mojo, and I had to double up 2 electro caps to get the bidirectional one. It is shown that way in the schematic, but not on the perf layout. Oh, and I used a B type rate pot.

I did check the connections twice, and I am "pretty" confident I built it right. Does anybody have any ideas what to try? Should I try to get my hands on an LM1600?

Thanks!
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