The Amp Garage

I suspect you've got a leaky capacitor in the audio path. no it isn't unfortunately, I went through every component and tested every cable, resistor , pot , cap , jack all the way from the input jacks to the 220k mixing resistors and still no change. Decided to spend a day on it , mystery amp wins.

You're right , I had a great scope for many years, It was a loaner that I thought the owner had forgotten about , but he asked for it back a few months ago and I've been avoiding buying one to replace it .... slack I know , but I think it's time ...

Hi folks , This one has me stumped ... I have a 70's Master Volume Pull Super Six Reverb in for service, All issues it came in for have been resolved apart from 1 - the Normal Channel is about 1/2 the volume of the Vibrato Channel, It's doing my head in. Voltages on both channel preamps are identica...

Just fired up the Express Build , Loving this PCB , I squeezed it into a Hammond Aluminium Chassis and it's turned out a treat . Sounds fantastic , I did some slight changes as I didn't want it the same as my Barwatt Express Head , And I had an old JTM45 OT spare so I went with that and used KT66's ...

Thanks for your reply , I've ordered two from your site and a Dumblator PCB as well

regards
Mark

The first Fender Deluxe? Whose schematic is this? I couldn't find anything prior to the 5A3, whose supposed schematic (according to ampwares) shows a 5M grid leak resistor on input - if I read well :? The 1st Fender Deluxe was the Model 26 , called "woodies" by collectors, It was housed in a wooden...

Hello boys and girls! As part as a new product line for my PCBs, I've decided to venture into a Trainwreck style PCB! Took me a good couple of months to get everything sorted but here's the final result! I'm planning to send this out to the manufacturer next week, and it will then available on my w...

Thousand thanks! Did you really made for an 0M grid leak resistor option on input? I don't think that would be sustainable... :? It's the only switch I had in my stash , I'll swap it out eventually , though it doesn't seem to cause an issue at the moment, many early 40's amps didn't have it, the fi...

Thanks! I'll have to study how that behaves. Seems that you are satisfied with it, at least. It was to fit in with the single tone tweed deluxe guise layout of the faceplate . It's Rich Gordons mod, I simply incorporated it , I haven't played with the values yet though it seems pretty good with Ric...

Perhaps what you want is more like this: Express_AMW_2.GIF Thanks for fixing that for me , I get what you're saying now I changed it to an on/off/on toggle so It gave options ,1M, 0 , 2M It's very subtle , but it's there . I have a close friend who put his harmonicas through it , definitely needed ...

ChopSauce wrote: ↑Sat May 06, 2023 11:39 am Thanks for summarizing "things" ...

If you don't mind one question from an ignorant: how about that tone control?

Not sure what you're asking , it's an alternative to the standard TMB tone control

Here it is , I really like the 2M input , over the standard 1M ... As drawn, the input impedance is 63.9K on either input. The grounded resistor on the jack is the 'input resistor.' It sets the amp's input impedance to 1,000,000 ohms (1M) or 2,000,000 (2M) to boost the signal voltage from the guita...

I really like the 2M input , over the standard 1M ... Why, may I ask? cheers, It adds a little sparkle overall, It's not like a bright cap , just an audible difference which I like, hard to explain but you can definitely hear it . I first saw it my 1946 Fender Model 26 Deluxe , It was on the Mic in...

Here it is , I really like the 2M input , over the standard 1M ...

Is anyone interested in the schematic of my musings .... after many hours of changing the values of components, chopping /changing and trying all the possibilities I can think of , I have finally come up with my own recipe for this amp. You may find a better recipe. It's combining the Rich Gordon de...