Here's the link. This amp was discussed in Wallace Marx' article that appeared in the 8/10 issue of Premier Guitar. According to Mr. Marx, this amp was Guild's first effort at a top of the line amp with some 'hi-fi' attributes. It runs on two sets of three 50L6s with each set ganged in series. One group handles the positive half of the waveform and the other the negative half in a push/pull design. The amp does not have a conventional power transformer / rectifier configuration; instead it has selenium rectifiers on each leg of the incoming power (ID'd in pics below).
Auction: seller mentioned that he thought it been re-covered ....
W. Marx Premier Guitar article re/ Guild amps 8/2010: but it doesn't look like it's been re-covered.
Chipped corner on side of auction amp:
W. Marx Premier Guitar article re/ Guild amps 8/2010: chassis view - notice two red/orange rectifiers:
Auction amp chassis pics; right (notice brown wire sticking up in the air at the extreme right) and the two rectifiers; the squarish blue green box in the middle of the pic and the smaller / gray one on the right:
... and middle
... and left:
The speakers ... and fine ones they are ... early Jensen Alnico 5 'PM' (permanent magnet) P12Ps wired together with a pair of 4" Jensen tweeters. Notice the 2 brown capacitors in the upper right acting as a 'crossover'; a first order filter blocking low frequencies from reaching the tweeters.
The tweeters can be switched in and out of the circuit via a switch on the control panel.
The market long ago stopped supporting the 50L6; maybe you can find some used ... who knows. The rectifiers are selenium; in trace amounts good for your health; these have to be replaced immediately - selenium in this form is poisonous. Seller acknowledges this one doesn't work but offers:
"This may be a perfect amp to restore because i have never seen one."
I don't know about you but I'm sold ... after all, if he's never seen one, it's gotta be worth the trouble. :wink: Without a new power transformer, a new output transformer, and four new tubes to match the new OT (leaving the other two power tube sockets empty), this amp - even if it worked - wouldn't provide much power, tone, or reliability.
Edit: remark about power transformer edited.
Auction: seller mentioned that he thought it been re-covered ....
W. Marx Premier Guitar article re/ Guild amps 8/2010: but it doesn't look like it's been re-covered.
Chipped corner on side of auction amp:
W. Marx Premier Guitar article re/ Guild amps 8/2010: chassis view - notice two red/orange rectifiers:
Auction amp chassis pics; right (notice brown wire sticking up in the air at the extreme right) and the two rectifiers; the squarish blue green box in the middle of the pic and the smaller / gray one on the right:
... and middle
... and left:
The speakers ... and fine ones they are ... early Jensen Alnico 5 'PM' (permanent magnet) P12Ps wired together with a pair of 4" Jensen tweeters. Notice the 2 brown capacitors in the upper right acting as a 'crossover'; a first order filter blocking low frequencies from reaching the tweeters.
The tweeters can be switched in and out of the circuit via a switch on the control panel.
The market long ago stopped supporting the 50L6; maybe you can find some used ... who knows. The rectifiers are selenium; in trace amounts good for your health; these have to be replaced immediately - selenium in this form is poisonous. Seller acknowledges this one doesn't work but offers:
"This may be a perfect amp to restore because i have never seen one."
I don't know about you but I'm sold ... after all, if he's never seen one, it's gotta be worth the trouble. :wink: Without a new power transformer, a new output transformer, and four new tubes to match the new OT (leaving the other two power tube sockets empty), this amp - even if it worked - wouldn't provide much power, tone, or reliability.
Edit: remark about power transformer edited.