The Amp Garage

I tend to believe that the VVR is best if you intend to play mostly at low volume levels. At least, mine is working fine in this case, but I couldn't get rid of some extra noise when cranked. Out the top of my head, I could read some post(*) which suggests that the grounding scheme is rather picky w...

& now I need to build one for playing guitar inside my van ... (-;

Too bad, indeed. Désolé Phil !

I suggest you do some yoga. Even scarce, good vibes are contagious.

Enjoy the journey!

In my book there is no such thing as an expert claiming that he knows everything in his field. On the contrary, as soon as he starts to think that he knows everything he ceases to learn and starts to loose something of his expertise - when dealing with Dumble's stuff, especially ... precaution seems...

@Francisco : I sent you a PM

Thanks for the insights. You might as well edit your previous message to make the reading more seamless.

By the way, does anyone see what the tone cap is?

Great. I'm glad I discovered that, but am I the only one puzzled by the "separate grounding" of the caps, as per

I'll take (much) care. Thanks for the advice ...

Could you measure something to explain the noise?

NB I'm asking not to confuse you, just for I am not sure about my board. I couldn't measure anything on it but I'm suspecting it anyway ...

Sounds like the easiest fix would be to rivet the sides of a basic chassis...

By the way, I think I could read that the TT chassis is not just true to the dimensions of an original Dumble (maybe due to conversion of dimensions to metric ? )

With apologies for deviating from the original question ... :? minus poles after rectifier (anodes of diodes) should not be grounded to chassis! should go directly to negative terminal of the electrolytic cap! chassis in amp building need to be considered as if it were made of plastic, not connectin...

Dimarzio did it ... :lol: (or at least managed to... :? ) I meant how far from your country can you enforce trademark protection ? Not sure a lot of companies would manage to protect their trademark on the internal market of China, for example, plus from outside the US, US citizens appear to be fair...

I drilled, cut and filed by hand and it was a hell of a lot of work but well worth it. I'm not sure if HAD used a CNC, looking at a few of the amps from that era, I suspect he took the same route as I did. You did it by hand ?!. I was convinced that you had a CNC milling machine. That is great work...