sticky1138
Well-known member
Just finished this FuzzDog Recurring Nightmare, which is a DBA Echo Dream clone. Fired it up and it’s not functioning properly.
There is no dry guitar or delay effect coming through, but there is oscillation that responds according to all the controls. Volume/Mix/Fuzz pots each affect the oscillation volume, Rate/Time/Depth control the shape, switches have some audible effect, etc.
My first thought was a fake/bad 2206 chip, but it is from Jameco, which appears to be a reputable dealer. I also tried a couple from Amazon (!) for shits and giggles, and they behave the same.
To anyone familiar with how PT2399 circuits work, based on the output I’m getting, what should I be investigating?
• I am using my usual test rig. It functions normally with every other working circuit.
• As far as I know, referencing pics of others’ successful builds, my components are correct.
• Tilting up the pots, I don’t see any cold joints or bridges, but I haven’t removed them for a deep inspection. (Not looking forward to that because I used lead-free solder!)
• It’s looks like a tight fit, but that 5817 is not touching the pot legs.
There is no dry guitar or delay effect coming through, but there is oscillation that responds according to all the controls. Volume/Mix/Fuzz pots each affect the oscillation volume, Rate/Time/Depth control the shape, switches have some audible effect, etc.
My first thought was a fake/bad 2206 chip, but it is from Jameco, which appears to be a reputable dealer. I also tried a couple from Amazon (!) for shits and giggles, and they behave the same.
To anyone familiar with how PT2399 circuits work, based on the output I’m getting, what should I be investigating?
• I am using my usual test rig. It functions normally with every other working circuit.
• As far as I know, referencing pics of others’ successful builds, my components are correct.
• Tilting up the pots, I don’t see any cold joints or bridges, but I haven’t removed them for a deep inspection. (Not looking forward to that because I used lead-free solder!)
• It’s looks like a tight fit, but that 5817 is not touching the pot legs.
