The Amp Garage

I have rebuilt quite a few and that’s what the original transformers look like. Those tube shields do not look original to me though. They are not the most noise free amps when turned up loud since while the wiring is beautiful some of the grounds are daisy chained . Another flaw is that the PI sect...

I don't understand going this route.
If you have the room and with how cheap wire wound ciramic's are you can near double the wattage ( for extreame longevity and stability) and still be under the cost of those.

Give me your mailing address and I will send you a few!

These simple testers only test the emission level of the tubes cathode, so as such they are fine for testing out rectifier tubes but will not tell you how well a audio tube will amplify signal level. Like testing a rectifier tube these testers in terms a audio tube will tell you only how much life i...

With the ability you have displayed in the great reserection of the chassis you should be able to make a cab for the head easy! You might check out North coast music, as they have,or had repro cabinets. No Zobel network added to the output stage for safety? It seems everything back then was rated fo...

That’s not what the first reply to your post was questioning.

You referred to a 12AX7 as a pentode when it’s not, in fact the whole large number of the 12A series of tubes ( 12ax7 av7, au7, at7 and others) are all duel triode tubes.
They can perform 2 separate amplification functions in other words.

The main difference you would find with 34s is that the output stage will clip sooner . 34s have more gain then a 6L6, and of course this also translates into a tad more touch sensitivity. This may help to float your boat or maybe not? One other thing you can try is a set of Groovetubes 6L6 tubes . ...

It does not make a lick of sense to me other then two 50 Uf caps are likely cheaper then one 100 Uf and the same might go for all the 40uf and 8 Uf caps being cheaper then one 50 Uf, but I don’t know with todays prices! All of the added voltage storage area as with the way it’s drawn might make the ...

Tubes pull millamps when at idle, not mv even though your reading mv . Besides that, something does not seem right for the TS tubes to be pulling 50% more current yet the B+ dropping only 5 volts. Does your heater voltage change between having the JJs or the TS’s in the amp. Also note that the TS tu...

Yes, all the silverface 70 and 135 watt amps where Ul and as such not what you want it your looking for a true Deluxe playing feel and response .

Let's look at the numbers. Four 9 pin preamp tubes need 1.2 amp of heater current, then add to that another 1.8 amps for the heaters in the 6L6 type tubes for a total of 3 amps. NOW Take the at same 1.2 amps of preamp tube current and add the 3 amps needed for the 34s and your needs are now 4.2 amps...

Yes, that’s another good possibility stated in the above post.

Use a clip lead jumper to go right to the output leg of a pot that might be suspicious.

Simple continuity test that follows the signal flow Plath will tell you what's going on. I can tell you from my own experience and in fact more then once,( like 3 times ) it would not be the first time that what looks like perfect new wire had a break in it, or even in terms of stranded core wire wh...

Do a search on here, as I thought I recall some questions about a Matamp a few months ago, I forget which section though!

Hi RG! Oh yes I know, but with mine only kicking out the low 18 rms that it does I did not thank that the original where stressed all that much where a silicon would be a big advantage. Now in the bigger amps I know it’s a life giving up grade. And by the way, thanks for all the knowledge sharing yo...