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Discussion in 'Glowing Bottle Tube Amp Forum' started by Wicked-T, Sep 17, 2017.
Cool amp! I have a TV front 5A3.
What are those red/orange octal "cans?"
They look like an adapter to allow use of a 12ax7 type tube.
It's for using 9 pin tubes.
It's there I take a picture of it.
I found by google it's a output transformer for a 40 watt 4 ohm amp like a
Tremolux, pro reverb, vibrolux and the like.
Re: your O/T. That stinks. Needs to be 8 ohms, of course. I know they're slightly pricey but Mercury Magnetics is good about winding to original specs.
Great amp, great project.
Their a bit pricey I think Classictone.com are a bit better on the prices, but
Here you go!
Maybe the amp is a transition amp, the 5B3 has .05uf in the first two caps
mine has .1uf like in the 5C3 or I could be wrong.
The serial number indicates a production date of 1953. Is that a faded ink-stamped date code right above the 9 in the serial number. It appears that I can make out a 'C' for the first letter...which is 1953.
It has been rather poorly recovered. The Cesar Diaz tag is kind of cool. Considering the recover, the OT, and the missing speaker; I would hope that the cost of the amp was appropriately adjusted. It is in the player category because of those 3 aspects. These can be great amps. I would suggest a P12Q or higher true Jensen. A P12P or N would make the amp 'bigger'.....a Weber Vintage series 12A150 for a new speaker.
Thanks for the info, let's just say it was less than a kit you put together from Mojotone.
I'll most likely use for now a 1990's Weber VST P12Q.
Good buy....great speaker. Ime, those PIO caps...tone and coupling....have outlived their useful life. All of the resistors are suspect. I would suggest checking all of them. There is an electrolytic bypass cap that needs to be changed, Ime and imho.
Would anyone know what the voltage's are at pin 8 and 3 on the 6V6's. I measured
390volts and 340volts. I also measured the the bias resistor at 253ohm and it's
dropping voltage as 19.55v in which using the bias calculator on the web (Rob's)
it's about 12.4 watt's, If that's a bit high could I lower that by a higher resistor?
I did have a bit of crackling noise but it was one of those 6SC7 tube and it was
I have yet to try or own any Deluxe earlier than a 5E3. I sure hope to find one some day! I did repair an old 40's Regal amp with octal preamp tubes. It sounded sooo good! I'd love to get my hands on a 5A3, 5B 5C, or 5D3.
I'd love to slam my ES-335 thru it and hear that baby sing.
Congrats on a great amp. I'm certainly covering it.
It's sounding good but need to change the caps motorboating!
Any amp that is motor boating is NOT sounding good. It is on the verge of failure and cannot possibly sound as it should. Once that amp is recapped and properly serviced, then one will understand that simply making some sort of sound come out of a speaker cannot be 'sounding good'. Even if it were not motorboating, thiose old electrolytics cannot provide voltage in such a manner as to allow the circuit to produce proper and good sonics, Ime.
I ordered some F&T's 20uf and a few Sprague 25uf 50v today, should get them
in a few day's
Great amp -- congrats!
In an amp that old, think of the electronics renewal as musical rescue and recovery, not museum restoration to display under glass.
There's a big thing about that in the guitar world don't change anything even if
it's bad, but look a lot of these amps are pushing 60 years now and even if we
would love to keep it all original sometimes you can't the caps really start to
leak. In mine the volume was very scratchy sounded and it was the coupling
caps which I replaced and it's better.