The Amp Garage

Since Santana got enough money to have many amp on stage, this may be his scream only machine, eventually it might get nicely clean using guitar vol only. Anyway, interesting amp.

Pots positions make me feel that this amp might be kind of HRM without fenderish TS after 1st stage (drive is first then BMT).

Personaly, me thinks that it's easier to build a nice sounding tube amp rather than SS - less time required for designing, although SS can sound nice, just my 0.02$.

So let's start from reverb, I think that it look far more better shown below. Now I wonder about this yellow wire marked 1. That is definetly an error, maybe it should go from cathode ? Hm but the signal seems to be in faze then ...

When I saw yesterday this schematic I desided to redraw it - man, it was pain in my a**. I'm not sure if it's all right, I'm not really sure if first filter is ok, the second should be fine, also the reverb was drawn so tricky that I had to think a bit, here's the schematic made in Eagle PCB (.sch f...

I've built myself RF Drive (aka Robben Ford Drive) which was supposed to be kind of D in a box. In fact it was just Zen with diode clipping, I must say that it didn't sound good to me, it had nothing to with smooth tone I was after, so I have modified it and now it sounds good, however, nom I'm look...

You can use source followers using for example IRF830 instead of extra tube, some may say that this is not "true", that you should use tubes only... but it was proven that there is NO difference between tube or solid follower.
http://www.geofex.com/Article_Folders/m ... tfolly.htm

Is it me, or there is EF86 feel ?

I would add source follower on IRF*** to drive tone stack, I think that buliding a preamp is a cool thing, I always thought of designing a pcb for such thing, also a cab simulator would be nice too, then pack it all to 1U rack chassis.

Delete please

AFAIK, if all parts have CE certification, than the wole amp should have, but I'm not expert, all this CE just kills small manufactures.

Structo wrote:Paul he mentioned that it was a design goal to use axial caps and be able to service the amp later without lifting the board.

Ok, sorry, I did not red that too carefully

Nice pcb, why did you used axial caps instead of "classic" snap-in ?
I was always wondering, why I haven't seen anyone here doing a pcb dumble, I was even thinking about designing own pcb.

jelle wrote:Why does it say Dumble on it?

Chassis says Dumble which may offend someone but it was what I could get my hands on at the time.

...

'smooth' often reffers to more scoped highs tones, you could try adding extra cap between signal path and ground, for example vol pot out and ground, start from 47p and go higher (I would even start from 120p).