calling Doug H...firefly qs...

[swt]

Hey! Doug!. I think that pre/pedal/distortion is AMAZING for practice/recording. I'm planning on building one. Have a couple of qs. Can i just use a 220v to 10v transformer as the audio one?. I know there's no interleaving in a power tranny, but just for practice purposes...is it possible?. How about current draw, primary and secondary?. And also...current draw for the power one?. Thanks a lot!!
PS: forgot to mention that i also find the distortion boxes great. Specially the vox exp. You should patent them and make some deal with some company. Truly..they're really good!

[Ansil]

i didn't try the exact transformer you were talking of but i have used a 120 to 12.kv transformer and got good results..   could have been better, but not bad much better than anyone would lead you to beleive..

[swt]

what speakers load are you using?. Isn't that too mismatched?. As far as i know it's like 1600 into a 16 ohms load. And the schem shows 8k. How does that sound?.

[Ansil]

i didn't do any math on it.. .lol, or i probally would have still had it on the pen and paper stage.    i just plugged it up and hoped it didn't explode.

it had a nice crunchy sound,  although there was a slight metallic overtone that would occure sometimes..  maybe a harmonic..  maybe a meltdown..

[Doug H]

Note that I made a change to the schematic. I'm now wiring up my 125a output transformer for a 22.5k primary impedance. I like the sound of it. It firms up the mids and smooths out the sound. I also adjusted the conjunctive filter cap to open up the highs a little more, since I lost some with the higher impedance.

You can use a power transformer for an output transformer if it has the impedance ratio you want to use. I have never tried it though, so I don't know how it sounds.

Doug

[Peter Snowberg]

I've heard some tube folks talking about using 120:6.3VCT transformers for outputs. All the references were on hi-fi sites and they talked about the lack of bass, but that may not be much of problem here.

-Peter