Will try to do that but it’s such a bitch to get it out of the enclosure and I hate accidentally pulling wires ?? What value resistor is ideal for R22? Thanks for the suggestion.You could reduce the value of R22 to get some more gain out of the last stage
Once you get it pulled, and the pads clear, try a few different values. I'd start with 1k, nd adjust as neededWill try to do that but it’s such a bitch to get it out of the enclosure and I hate accidentally pulling wires ?? What value resistor is ideal for R22? Thanks for the suggestion.
IMine's pretty freakin' loud. This is the unity volume setting on my Ungula with fairly hot humbuckers. It's pretty damned bassy too.
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I did change my LEVEL pot to A100K. I respect Jamie Stillman's designs, but a 1M volume pot makes no sense to me. Whatever follows your Ungula may be loading it down. A lower value LEVEL pot might just fix that. You can up the gain in the last stage as DGWVI suggested, but you should adjust the bias if you change R22. Otherwise, you'll lose some headroom. Where did you get your 2N1308s? You might want to check the bias on those, in case they are too leaky. The 2N3108s are biased hot in this circuit, and if the leakage is too high, they'll saturate before the LEDs can conduct. On mine, the collector voltages for Q2 and Q3 are approx 2.7V. If they get under 2V, then there's a problem. If you want to try upping the gain on the last stage, you can use some clip leads and temporarily jumper a 2.2K resistor in parallel with R22. See if that gets you where you wanna go without pulling the board.
nice build! I don’t know how to measure or bias things. I can follow instructions and diagrams. Got my tranny’s at usource.net they’re based in China. They get bad reviews but what do I know? All I know is the transistor(s) I bought worked for the pedal. I’m gonna try to do all suggestions likely tomorrow or Sunday. ?Mine's pretty freakin' loud. This is the unity volume setting on my Ungula with fairly hot humbuckers. It's pretty damned bassy too.
View attachment 1612
I did change my LEVEL pot to A100K. I respect Jamie Stillman's designs, but a 1M volume pot makes no sense to me. Whatever follows your Ungula may be loading it down. A lower value LEVEL pot might just fix that. You can up the gain in the last stage as DGWVI suggested, but you should adjust the bias if you change R22. Otherwise, you'll lose some headroom. Where did you get your 2N1308s? You might want to check the bias on those, in case they are too leaky. The 2N3108s are biased hot in this circuit, and if the leakage is too high, they'll saturate before the LEDs can conduct. On mine, the collector voltages for Q2 and Q3 are approx 2.7V. If they get under 2V, then there's a problem. If you want to try upping the gain on the last stage, you can use some clip leads and temporarily jumper a 2.2K resistor in parallel with R22. See if that gets you where you wanna go without pulling the board.
No problem. And thanks for always being helpful as wellThanks for the lead! I just placed an order for some GE trannys at UTsource. I'll let you know how it turns out.
After some back & forth, UTsource refunded me the cost of the 18 bad transistors. I will not recommend them, there are too many good sources for Ge transistors. I have yet to find a good source for 1N34As. The ones I got from from Tayda and Guitar Pedal Parts are fugazi.
I haven’t tried those particular ones but I’m sure they’re legit... everything from him I’ve got has been good... takes him awhile to ship your stuff out though...Thnx. You told me about those guys before. 4head smack for me.
After some back & forth, UTsource refunded me the cost of the 18 bad transistors. I will not recommend them, there are too many good sources for Ge transistors. I have yet to find a good source for 1N34As. The ones I got from from Tayda and Guitar Pedal Parts are fugazi.