Green Ringer

eggman6 · June 09, 2008, 06:41:17 PM

Built a Green Ringer on prototype board, it works, but it doesn't. It seems to act as a booster and no octave, i finished it not so long ago and so will check it properly tomorrow since its quite late. I initially forgot the 100uf electrolytic, but putting that in didn't change much. Probably a silly mistake i've made somewhere, but it does seem a bit confusing.

eggman6 · June 09, 2008, 06:44:52 PM

Okay just came to me this second, i bet i've put the diodes in wrong. I'm not generally this stupid.

Yea went in wrong way round, could this damage the transistors, or the diodes?

petemoore · June 09, 2008, 07:10:21 PM

Shouldn't have damaged anything...
Check the transistor orientation, notice which way the emitters are pointing, it uses PNP and NPN transistors..

eggman6 · June 09, 2008, 07:24:01 PM

Yea i made sure i got the tranistors right, downlaoded the spec sheets, but me being me completly forgot about the diodes.

petemoore · June 09, 2008, 07:45:08 PM

No matter, stick 'em in there the right way round...

eggman6 · June 10, 2008, 05:29:09 AM

Hmm no luck only works when one diodes are facing opposit directions (the initial mistake i made), just going to rip this apart and start again. Maybe i should just stick with amplifiers.

eggman6 · June 10, 2008, 02:48:06 PM

ok, is it possible that any wiring error could damage the transistors or diodes? The only way i can get any signal is if each diode is pointing in a different direction in relation to the other.

Only other factors i can think of is that the battery is low, reading at 8.40v dissconnected. I cant imagine it being a ground problem since everything is grounded apropiately, i haven't grouped or organised the grounds in any perticular way but then i didn't think something such as this would be as touchy on ground placement as amplifiers are. I've got plenty of 2n5089s, but only one spare 2n3906 and no diodes.

eggman6 · June 11, 2008, 01:32:14 PM

Problem solved.

foxfire · June 11, 2008, 01:38:55 PM

so what was it? rylan

eggman6 · June 11, 2008, 02:06:05 PM

Went from the 560k, to the 160k without going to pin 2 of Q1. I'm the worst for these mistakes, i built a soldano style preamp and spent a day wondering (losing my mind) why it wouldn't work, when i had just forgot to ground the input.

I noticed the tonepad green ringer has a 2m2 input resistor instead of the 1m5 on GGG, what difference does this have?

MikeH · June 11, 2008, 02:57:45 PM

The difference is 1, maybe 2 hills of beans. It's just a pulldown to keep the switch from popping. Anything above 1M will work.

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Green Ringer