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Smokey amp vII
... continued from Smokey amp vI
20101103: worked on the amp tonight on a breadboard. Well, I understood a few more points, by testing and looking at other schemas of smokey-amp like (in the link section):
20101108: made version 2 on Friday evening. No cap on the input, but a ferrite. Is it a crime or something great (or just useless) ? Dunno. Put also a BIG FAT cap (470 uF) on the power rail and that's a killer : barely no more noise and sound is much more clean. Also important. this one has a gain control pot (10k, too big but I have nothing smaller currently) which is very good : full power you still have noise, but if you just lower it a bit, then bye bye noise and enjoy a clear sound that is plenty sufficient for playing at home on the sofa. Schema coming soon...
20101110: found some guy's comment on blueguitar.org. I copy the guy's comment on a separate page to keep it. Thanks for sharing, that will be most useful I guess.
20101118: well I tried many tricks, tried to implement many alternate Smokey amp like the Smokey Tone Amp of BeavisAudio, variations found on internet ... same : I've got lots of noise. A pot on the gain and a big cap between power rails make things better but no miracle here, I've still got lots of distortion and a background noise. Impossible to get a clear and clean noise.
20101128: it's not because sound is not perfect (hum hum ... far from it in fact) that I should not use it and case it into something. As you can see on the right hand picture, I cased it in a metal "hot lemon tea" can. The plug is in the top cap, and the speaker at the bottom. I tried to fix the speaker with nut and bolts, but to fix the nut to the speaker I soldered it but it didn't stay in place once a little force is applied. Maybe with an arc soldering tool I could, but nothing like that at home, so I will replace it with steel wires, should do the trick.
Only interresting stuff is that now - from power goes to the middle section of the 6.3 mm plug and goes back from the top (not the tip, the other side). Benefit ? Well, no need for a switch, if nothing is plugged in, the circuit is open and battery unused. Got the idea by seing a real SmokeyAmp once.
... continues on Smokey amp vIII
Version 2, with gain pot and tone control (useless)
Version 2, case into a metal can of hot lemon drink.
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