PSL? Please help Identify - I'm stumped

[grimmie]

So, I picked up this tube amp(?) at an estate sale with the intention of reselling it - but I can't find any information on it. (I'm a Sansui guy). Has anyone got a clue what this 60Lb beast is? Someone mentioned perhaps Phillips Sound Lab but I can't find anything on the either.
Located in Melbourne, Florida.

Thanks for any help!
Grimmie

 

[p_mouse]

No idea what it is exactly, but the wiring makes me sad (especially the heaters)
Almost makes me think it's a DIY project to be very honest (NOFI)
Caps are also all over the place and color wiring coding around mains connector don't seem to be according standards (little difficult to see)

 

[peterh]

My guess is a mono OTL amp ( transformerless ) Try trace the other one, two are used for stereo.

 

[Lavane]

It looks home built to me looking at the parts used.

 

[zackthedog]

Yeah, homebrew OTL amp. Too bad there's only one! It's a kind of a boat anchor without the other channel.

 

[p_mouse]

Bunch of 6AS7 for OTL makes a lot of sense.
Just google for 1 sec, and you will find plenty of schematics that look a lot like this amp.
Can't see what the pre-amp tubes are.

 

[grimmie]

One of the pre-amp tubes is a Sylvania 6SN7 GTA, the other tube with a brown base has nothing on it to identify.

 

[century tek]

On that PSL amp, how many speaker connections are in the rear? If only one, then mono.

The brown base is also a 6SN7. Just a different brand and more rugged.

 

[gadget73]

looks like one input jack and one pair of outputs. Mono.

OTL amps are interesting in concept but boy is that a lot of tubes to feed.

 

[zackthedog]

On that PSL amp, how many speaker connections are in the rear? If only one, then mono.

The brown base is also a 6SN7. Just a different brand and more rugged.

That brown-base tube looks very much like a Sylvania JAN 6SL7, judging by the short plates.

 

[century tek]

looks like one input jack and one pair of outputs. Mono.

D'oh! Smack on the forehead! I saw that! It's back to decaf.

It could still be a 6SN7 tube. Its the tolerances inside that really make a difference. Look at the 12AX7 and 12AU7. Same length. Probably bad example with the 12AT7 and all.