Messages

Is there a way to determine the forward voltage drop of a germanium diode from a datasheet? All of them seem to state that the forward voltage drop is 1v which cant be right. Im running low on OA126 diodes which I love as clipping diodes, but they seem to have disappeared from ebay, so I was trying to see if there is an equivalent, in the russian D9 series, or other commonly ebay-able and cheapish diodes, and dont really want to order 10 different diodes just to get 10 functionally identical for clipping diodes.

Its just a resistor to drain off the caps when bypassed, so you dont get a pop when turning it on. If you get a pop, try a 1M or greater to taste.

I left the zener diode off, with no ill effects, if the powersupply is 9v or regulated, I cant see it mattering.

Thank you, Increasing R12 to 1M improved matters significantly.

And thanks, that was the kind of resource I was looking for.

Oh, and R12 is 750k, R20 is 200k as recommended in the build doc.

Hi all, I built the cave dweller dub ed, and it sounds great except when I have the dwell pot past half it starts to go into runaway oscillation increasing in volume. Any ideas on the possible cause?

I checked for solder bridges, remelt,  and checked values against the BOM. I built two and they have identical problems. Its not boxed.

I did not implement the mix mod. And left the pads open.  I had to substitute a 27pf cap for C6 (22pf) cause I forgot to order them and it was as close as I could find. I didnt think it was a big enough difference to matter.

(Also, Is there a good resource for the PT2399 based circuits, I understand half  of whats going on from the datasheet, but is there anything more comprehensive? )