Don't post in this forum asking is there is a schematic or layout or info on XXX pedal.
There is a subforum setup for requests already. It is located here:
REQUESTS FORUM
Any requests posted here will be moved to proper sub forum, and I'll also make nasty remarks about your mother. :mrgreen:
also, if you have a problem with your build, post it in the WORKBENCH. these threads are for circuit analysis only. by all means, if you discover something we should...
Anybody have a schematic for the Digitech PDS 8000? I have one that produces no effect and the infinite loop is locked on. I will at times get a digital squeal when the effect is engaged (and the infinite loop is too obviously) until I go back to bypass.
No, the VD does not stand for venereal disease . It stands for vintage delay .
There's a Cool Audio V3205 under the hood. The clock chip is marked CD3102GP, which is NOT made by Cool Audio. Does anyone recognize the manufacturer logo on it?
Bottom side has a shit-ton of SMD, as expected.
I managed to eek out a bit more than 300ms out of it by dicking with clock trimmer. But it's a very tight range that sounds good (to me).
For the money, it's a pretty good short analog delay. The filtering...
I just received this crazy heavy beast , it's pretty rare apparantly . It's a standart snarling dogs wah combined with a ring modulator based on a LM565 , the same presented in the Anderton's book (the electronic projects for musicians). (The big metal cylinder is the inductor ) I took some pics of the guts :
(I also put a schematic from Jc mailet's site for the ring mod part)
I bought this pedal for £40 and I am impressed with how quiet it is even when I use a crap 9V supply that I know gives hum ripple. Looking at the Boss circuit my question is does this bit work or is it an error? It has a cap connecting base to ground so is the bias just the resistor? I have never seen a circuit like this.
Another curious question of mine, are claims of a BBD chip inside true? This is the cheapest 4-knob flanger I could find so I grabbed it for $10 shipped.
Inside I found an MN3207 BBD, an MN3102 Clock Generator, 2 x RC4558, and an 062C. Three trimpots all with the index mark at exactly 6:00 and 12:00, which makes me wonder if they'd been adjusted after assembly at all. I'm still playing with it before I dare adjust those.
Searches didn't clear up whether this was an optical compressor or not, so I had a look. I am guessing the big black cylinder with a triangle on the board next to it is the LED and photoresistor--does that seem right?
To save some squints, I observed a TL072 opamp, LM358 opamp, and a OP275G JFET. Seems to be some tantalum caps too. Transistors labelled 1AM (MMBT3904 from my searches).
Sorry for the lack of additional details, I just had it open and wanted to check it out....
The schematic:
As you can spot it is a Ross Compressor clone; as I marked in RED the changes they made to the schematic. These changes don't sound really good...... my unit was really bright and 'Boring' sounding!!
Does anybody have the schematics of the EBS Multidrive perhaps or else some information about the signal switching?
I'm actually not so much interested in the internals workings of the drive but more the switching arrangement and input/output stages because it pops when enabling it.
The foot-switch seems not to be true bypass but a simple one pole switch. This probably implies that the switching is done electronically and that the foot-switch provides a logical 1 or 0 to the electronic...
Usually suprised at the quality of their pedals. I have their v3 ep or bp comp, black one, and it’s pretty good. I’ve attached a pic of the version before mine as the last pic. I’d have to take mine apart and haven’t felt like it. Actually the comp is first. Have no clue what the goop is covering. It’s optical. Supposed to have an EP style boost.
For component values I cannot make confirmations as all is on quick notes and some scans made over a year ago. As for the schematic I could check and re-check for possible errors. However, whatever I will do, AG will pick out a few more. Let's say I'm lazy and will just wait :lol:
I recently received a broken Danelectro Cool Cat Transparent Overdrive V2.
Since no actual schematic seems to be available I have tried to create one using Kicad.
Most capacitors are smd, were removed and measured with RLC meter.
The Cool Cat Fuzz V2 input buffer seems similar.
The FET clipping is not yet drawn properly, suggestions welcome.
>> Update rev 0.2: Cleanup input, output, value R8
>> Update rev 0.3: tone pot wiring double checked and updated after check by bmxguitarsbmx
>>...
I have one of those puppies in house Quick google scanning shows no schematic. Do we need one? I could try to do it. This one is not working, my friend left it to fix it by me (haha!).
Hello,
I know usual practice is use larger/double value caps in bass version pedals, but In this case I'm thinking to mod the CS-3 input buffer as hi-pass filter, copying the input circuit from MusicMan onboard preamp:
(the first 2n2 cap to ground is specific to MM pickup and will be omitted)
Hi! I've picked this one up used, and it's an older, not status LED model. Sounds decent, and a good range of speeds available. Anyone saw a schematic for it, or should we try and trace?
Apparently it is a Klon, haven't been able to test it properly, because it whines so hard the signal is indiscernible, both when active and when in bypass (true bypass?).
I did open it up yesterday evening, but did not take pictures, will do that tonight.
It's got two TL072's (SMT, like most of the components) and a 7660, IIRC. Might just get rid of the 7660 and use a higher voltage wallwart.
Anyone else have issues with theirs? Would think that these pedals are more popular than they are...
I think we all pretty much know what this is, but as I have one sitting here, I thought I'd take a few shots.
Outside.JPG
Outside is actually a really nice gold finish. Not at all cream, the way it looks on the website
Switch.JPG
I've seen this somewhere before... Not great soldering on the wires. I might have to beef that up.
Inside1.JPG
Underside Shot
Inside2.JPG
All of the pots that control EQ are 100Kb. I'll get some better pictures up once I get home.
Ok I got a RACK VERSION of a rev1 chandler tube driver...BUT...this has been modified by the previous owner
He's an acoustic guitar master and used this ONLY as a preamp...so asked a tech to modify this to REMOVE any drive or distorte signal
I can provide gutshots of everything inside but its modified so the request is
ANYONE HAS a PCB LAYOUT/PHOTO/ or actually a rack like the one I have...just Open it and give me some info
i cant really see any sign of mod (apart from some new resistor or...
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