This entry was posted
on Friday, June 8th, 2007 at 7:02 am and is filed under Projects.
You can follow any responses to this entry through the RSS 2.0 feed.
You can leave a response, or trackback from your own site.
what transistors should I use for this? The schematic says 2SC828 and 2SC539, but I can´t find them.
The newer version on the univox homepage says 2N2222 and 2N3391. But where should I place them?
I guess that the 2N2222 replaces the 2SC828 and the 2N3391 replaces the 2SC539. Is that correct?
I finally got transistors for this. You can still find 2SC828s, Small Bear (US) and Banzai (EU) both stock them.
They have a different pin-out than ‘regular’ transistors so make sure you insert them in the correct way, find a datasheet to confirm.
Is this pedal verified.I built it and I cant get any sound from it ,the led works bypass works but no sound at all .Usually when a pedal works you get a little hum or hiss but I don”t any thing at all . Also some schematics have the 10mf cap and 22k resistor in reverse order for the input.The 10mf goes last .
Were you able to find the fault? I am having the same issue, no sound…though it might have been a dodgy transistor but they’ve all tested ok. I’m wondering if the schematic was designed for the original 2SC828 and 2SC539 transistors which have non-standard pin outs – ECB rather than EBC? Or possibly one of the polarised caps could be wrong way? Unfortunately, I’m not really skilled enough to read schematics to be able to tell…