I like very much DrBoogey, but i've built it without the tonestack, as i don't like to many knobs, so i was trying to associate another kind of tonestack. I've breadboarded a tone+contour pots (i think those are the AMZ presence control), and will try others as well, with max 3 pots.

I hear the sound  of the boogey (without the TS) as well equilibrated, at the moment. Also, had luck, cause i built it on veroboard and didn't have oscillations problems.. I don't usually play mesas, so i can't speak for the similarity with those.

My carvin legacy emu has way much bass, btw...

Will look at the LM3886 schem, thanks very much !

Thanks !

I would like, in particular, to build a 50/70W guitar power amp (for powering my vooduvalve preamp) that uses a normal, say, marshall 4x12 speaker.

Is this possible using an IC (main powered, obviously) ? I mean, would the circuit be very difficult or some specific IC would provide the same simple schematic as in the LM386 amp circuit ?

I've read about many TDA20xx, but i'm a little confused about which TDA would do the job.

To build a poweramp for guitar (and already having a preamp as my rocktron) should i look for specific guitar poweramp or any poweramp (as the hifi ones and car radio ones i've seen) would be fine ?

Last question: would my already built stompboxes (BSIAB2, CarvinLegacy JFET emulation, Dr.Boogey, or even the Tillman JFET preamp) work as a preamp for such a kind of poweramp ?

I'm from Italy and we have 220V mains.


Thanks once again; i think i will make many other questions in the beginning, so please be patient.

Have a nice time

Hi there, i'm new to this forum, and rather new to electronics; till january 2009 i have been exploring mainly stompboxes, and i have successfully built some of them: a BSIAB2, a Tillman JFET preamp, a Carvin Legacy JFET emulation and a Dr.Boogey (MesaBoogie Rectifier JFET emulation);

I would now like to explore the power amp part of this fantastic hobby; but i am really afraid about high voltages, and so on...

I have a Roland Microcube (which i like very much), and i've seen the ROG LittleGem and Ruby projects (and also i tried to build a Ruby, but it doesn't sound right to me... maybe something wrong with my wiring);

But, mainly, i have some questions:

1) for battery powered amps, i've understood that only the LM386 will do the job, is that right ?
2) for mains powered amps, do i always need a trasformer and some heatsinks ??
3) what's the max power i can obtain for a battery powered amp (say, using 9V) ?


Sorry for the many and not ordered questions..... Just want to clarify a bit.


Thanks in advance.

Demy