The Amp Garage

Find a 1 amp circuit breaker and solder on some clip leads to clip across the fuse socket so you don't keep wasting fuses. :idea: rd ooo ooo ooo, very interested! I've counted down my remaining fuses and my money troubleshooting, got a Mouser link for one of these things? Here's the kind I have, wa...

thank you very much guys!!i checked the heater wiring in the sockets and everything is fine. The two green wires coming out the PT have zero resistance.i'm doing the 2nd step tomorrow,cos i don't have such fuses right now and i'll post the results.Thank you very much again Find a 1 amp circuit brea...

The single ended Class A amp is biased such that the zero signal idle current and the maximum output current drawn from the high voltage supply is nearly the same. There's no "sag" when going from low volume to high volume playing. Steve, I acknowledge that the above is the case for regular audio a...

Hi, I have ordered 1 Watt 470 resistor from Mojotone for my screen-grid, and here is the resistor I have received (in blue). It is smaller in size compared to the original (gray). Are those wrong wattage? May I used them safely or re-order correct ones? I really do have trouble finding them online....

Structo wrote:This is Tim Allen's '68 Camaro.
427cui

And here I thought Tim was a Mustang guy.
I have a picture of him with my brother at a Mustang show.
That was the big show in Charlotte when Bill Clinton showed up with his '67 Mustang.

rd

The single ended Class A amp is biased such that the zero signal idle current and the maximum output current drawn from the high voltage supply is nearly the same. There's no "sag" when going from low volume to high volume playing. The amp is basically operating at full current draw when at idle. In...

Yes the output tubes will run hot, Class A. That's because this type of inverter only works if the first tube amplifies the whole waveform. If the waveform goes into cutoff the second tube looses it's drive. So at or near clipping the whole scheme falls apart. There's some inherent imbalance in the ...

Treasure trove is right, they have the Radiotron Designer's Handbook both third and fourth editions.

NEWB ALERT - go immediately to the site and download RDH4 and start reading. ;->

rd

Looks like 3 and 6 are jumpered. I'd start by disconnecting the leads and seeing what has continuity. This makes me think maybe it's a "universal" output transformer, where different impedances can be selected by jumpering and/or selecting various taps. If so, the primary may also have one or more ...

I'm finding 11.125" dia. Sound right? JD Newell 1x12 combo - 10.5" MusicMan 1x12 combo - 10.75" 1980 Deluxe Reverb - 10 5/8" Inside diameter of the gasket on several different 12" Fender speakers - 11" It doesn't seem too consistent (or critical), just match it to your speaker's gasket I.D. edit: E...

If you want a nice smelling cab try Cedar.
Of course you don't want to go and hide the aroma by covering it with nitro or worse Tolex.
Problem is getting boards wide enough to fit anything but the smallest chassis.

Someone want to make me a Cedar cab ?
(I don't do woodwork ...)

rd

I like green.

That's teal green metallic right ?
I have a Strat (and a car) that color !

rd

and out of far left field ...

JC Superstar meets Jimi:

https://www.youtube.com/watch?v=ZPdLBD9s8HI

rd

SAFETY FIRST I guessed an unplugged amp cannot electrocute you :lol: but really, if there will be the need of checking anything while the amp is working, I have less than one error at my disposal. "learn over time" is not an option, LOL. Thanks a lot. This is a very dangerous guess !!! Once a high ...

Signal is traveling through your chassis. It can be power amp tube grounds from the cathodes, OT secondary to the speaker ground, PI ground or NFB ground (if present). These all need to be grounded to a common point (i.e. "power amp ground point") and not have the signal/power grounds use the chassi...