Tube Amp Identification

[haggy38]

Hi guys,

I just found this tube amp and I can't find any type of information, please help me identify this thing, year, manufacturer. Is a good find??

Gustavo

 

[BillWojo]

Don't know anything about the company but it looks like a nice little integrated amp. I think 40 watts is being pretty optimistic , maybe 30 watts. Do all 4 output tubes say Telefunkin?
I see you have it powered up, make sure you read the stickys at the top of this forum on bring a long dormant tube amp back to life. I hope you have a load connected, never run a tube amp without speakers or some kind of load.

BillWojo

 

[haggy38]

Hi,

Thanks, just one tube say Telefunkin, I just power it up couple of minutes. I will read the stickys, its my first tube amp.


Gustavo

 

[gadget73]

Can't tell but the sockets look like they may be held in with screws. If so, that may indicate a kit, or a very low production.

Date you may be able to guesstimate from the numbers on the transformers or can capacitor. There is usually a 6 or 7 digit string on there that contains the manufacturer ID code and a date code.

http://www.triodeel.com/eiacode.htm

I'll wing it and say late 1950s based on those knobs and the gold color though.

20+20 watts is pretty unrealistic, but a very common claim from EL84 amps. 12-15 watts per channel is definitely closer to reality. Still, it looks like a nice amplifier. Big transformers, Telefunken tubes, lots to love about that.

 

[LexDM3]

That looks like a potential winner. As stated above, be sure that you bring it up right. You don't want to blow anything up and ruin this very promising amp.

 

[thorpej]

Can't tell but the sockets look like they may be held in with screws. If so, that may indicate a kit, or a very low production.

Date you may be able to guesstimate from the numbers on the transformers or can capacitor. There is usually a 6 or 7 digit string on there that contains the manufacturer ID code and a date code.

http://www.triodeel.com/eiacode.htm

I'll wing it and say late 1950s based on those knobs and the gold color though.

20+20 watts is pretty unrealistic, but a very common claim from EL84 amps. 12-15 watts per channel is definitely closer to reality. Still, it looks like a nice amplifier. Big transformers, Telefunken tubes, lots to love about that.

Yah, this amp was probably made before the world mostly-settled on RMS power. 20W peak (per channel) ~= 14Wrms, which is perfectly reasonable for an EL84 amplifier. Looks like they did a nice job with layout, as well (it's laid out similar to the Eico HF-87, and follows the tried-and-true practice of "keep the small-signal tubes away from the power supply").

Those output transformers look pretty respectable, so I'd say you have a winner on your hands. I have a similar-in-spirit Heathkit AA-151 rated about the same power-wise, and it absolutely sings with a pair of Klipsch RB-61II bookshelf speakers (95dB @ 1W/1m). I recommend pairing with speakers of similar sensitivity, and I wager you'll be pretty happy with the result.

 

[battradio]

It has a Stancor power transfomer , the yellow label is a dead giveaway , if you're lucky the output transfomers will also be Stancor .

The yellow label , also means it was most likely made in the early 60's .

 

[haggy38]

Thanks guys for your feedback, tomorrow more pics so see internal details and take a decision what to do with this amp.


Gustavo

 

[haggy38]

Hi guys,

More pics of this amp, its worthy for a restoration ??

 

[s-petersen]

Certainly, it looks like 70's style parts inside

 

[gadget73]

I would. Its a little messy inside but nothing terrible.

 

[haggy38]

What type of speakers?? and how do I connect them?? and last but not least where to start??

 

[s-petersen]

Speakers connect between com and whatever ohms rating your speakers are.

 

[haggy38]

But no more than 15W each right?

 

[s-petersen]

You can use higher wattage, less efficient speakers, but they just won't get as loud as efficient ones will,
start with a cap replacement, one at a time,take many pictures of "before" so if you make a mistake, you can find it

 

[haggy38]

Any type of cap in special?? I mean brand... Thanks

Gustavo

 

[gadget73]

I use a lot of Nichicon for electrolytic caps, and Illinois MPW to replace paper caps. If it has film currently (the yellow flat ones may be) they might be fine.