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Using a scope, is the hum present in the +9 (Vcc ) or the -9v?

And the compression. I can recall distortion mode of my Sholtz Sustainer had healthy levels of compression (not the clipping kind).

I appreciate the offer! And that was what i thought, although I didn't expect auditioning 100's. That is brutal!

Is there a way to purchase said values or you have to buy a bunch, test and weed out until you find the correct Vgs?

I noticed the Proposition uses a FET for compression, which the build docs suggest requiring a select FET and the parts list has Q1 as a J201 and the schematic suggest a 2N4339 (which has a different pinout from the J201). Which is correct and what is the FET being selected for?

Looks discontinued.

Does PedalPCB have a build something like the MXR Rockman X100 pedal? My 'sound ' from 1987 to 1992 was a Rockman Sustainer Preamp into a Marshall Jubilee 2553 (small box 50w). Both have long been out of my fold. It was a pretty dated sound, but every once in a while I am nostalgic to jam on...

Interesting. I just asked AI to troubleshoot a pedal and it responded with a countdown of 'Skynet becoming aware,' then told me life is short and to just build another pedal.

Are you getting indicator lights? I recommend starting with checking the B+ power to the tubes. What is the recommended power supply for that pedal? I assume it would need to be capable of high current switching supply to go from low voltage to 250VDC while also supplying the tube filaments...

The battery leak may be coincidental, and your lack of vibrato may be something else. Do you know if you are getting vibrato signal at the mixer?

I was wondering why you don't just add a quality EQ pedal to the end of your PB chain, put that into a Class D power amp? I'd personally go with a splitter (to front of house and that EQ pedal), into a used EHX 44 Magnum, Duncan Power Stage or a QSC GX3, into a used passive full-range PA speaker...

Yes. And setting up expectations with contacting today's Ampeg, my experience has been they do not have the ability to be helpful on the prior owner's designs. Only the products they currently produce.

Yes, again according to SLM specs. SLM often did not connect the return braid of the coax cable to ground, hence it receiving its ground shielding from the tank chassis. SLM also liked to have parts common across its products. Hence if 79-214-02 reverb tank was the 'chosen', it got used in...

I was one of the very few PA area St. Louis Music repairman from the 80's to 2000's. It has been a long time since I have seen an Ampeg SS-140C, which is the predecessor to the VH-140C (they are essentially the same amp, sans a few changes in select components). I still have all the...

I find I occasionally make mistakes with the blocking holes ('cuts') or miss a small link.

You shouldn't have to isolate power supplies. For the Tone Vendor MKII: IC1, C7 and C4 should adequately isolate the positive and negative ground circuits. Since output jacks of many if not most pedals are tied to signal ground via chassis ground, that design has to be sufficient to allow...

Trace through your grounds and ensure your PNP style Tonebender has blocking caps on the input and output, as well as from circuit ground to chassis ground (which includes raw 1/4" jacks).

I am not familiar with the Hydra and there isn't a published schematic.

TY for the typo correction. IDK why I typed 15. At least I got the right resistor number!

Congrats! I was concerned as EPROMS are sensitive and do not standup to deviations. Since it is tied to the FV-1, I thought there was a good chance that would need to be replaced. If you want to expand your pedal to include the 7 effects inherent in the FV-1 chip, I believe I posted a...