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I’m not getting any signal, bypassed or engaged.
It’s obvious that some repairs were done to it prior to my purchasing it. You can tell because some of the tracing at the top was peeled off, so a white wire with blue strips was soldered on to bridge the gap.
Can anyone tell me if this appears to be wired correctly?
To see the photos in full screen, just right click on the photo and say open in new window:
Here’s the innards of my Attack Decay:
Hoping it’s somehow helpful.
With Mr. Davis focusing his time on developing new pedals for a different brand, this thread may become more and more important in keeping some of these rare old pedals going. The AD I was working on was given back to it’s owner some time ago.
I ended up having to reach out to some others for more input, as I was beating my head against the wall trying to figure out what was causing the “no effect” problem I was having. Instead of taking the time to look at what each part of the circuit was doing, I was just looking for bad parts, etc. Bad form on my part. When I was signal tracing with my o-scope, I was just picking up noise, not signal. Initially, it was a bad coupling cap after the first 4558 stage that was tripping me up. Once that bad coupling cap was figured out, I had a bit of an “Ah HA!” moment, and delved into what each ICs function was and things moved along quicker. Replaced a few ICs, then replaced the tants and ‘lytics, as a couple new chips went bad. After that, I spent a lot of time trying to get rid of extra noise that I thought was an indication something still wasn’t right. A few folks pointed out that, due to the compression early in the effect, they were just naturally noisy, and likely couldn’t be made quieter without significant modification.
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