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I got a 500C at a garage sale for cheap a while back. Did a mild tune-up on it before realizing that the power transformer was shot. Stuck it in the corner in disgust and went on to other projects. But it is in nice shape and I would like to fix it and put it in the bedroom system. Can anyone suggest a Hammond or Edcor power tranny that would supply the necessary voltages/current? I realize it won't be "original", but I am more interested in playing it than selling it.
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Its used these things hardly ever fail unless you don't change filter caps.
Honest amplification is better than excessive 2nd order distortion anytime.
EIA mfg + date code seems to be: 9263507 (926?)
Parts inventory number = T991-115C ?
Thanks!
Thordarson or Triad most likely.
Honest amplification is better than excessive 2nd order distortion anytime.
Triad = 830. I've seen plenty of Triad irons in old tweed era Fender amps. They usually have their name on label.
"926" is a mystery. Maybe, a secondary (sorry for the pun) company winding for Thordarson? Would be interesting to find the history.
Do your Fisher amps have "926" EIA stamped onto the trannies?
Do your Fisher amps have "926" EIA stamped onto the trannies?
I never looked. Steve,sometimes companies that bought parts like transformers and chokes would stamp their own part numbers on the case.
Many of those end bells were standardized sizes and the company would do that made them would do that for proprietary reasons.The RCA 119834 flyback transformers were made by Thordarson for RCA but RCA stamped their own part number on them..Coming from an industrial automotive town as I do I see this a lot.
Honest amplification is better than excessive 2nd order distortion anytime.
all of the 1950s Fairchild amps (Raymond Lowey cosmetic designs). Also, Todd OEM "top shelf" trannies for many of the late 1950s and early 1960s Fisher units and all of the same vintage Madison-Fielding amps.
Besides the Fairchild 255, 265, 275 amps,
Fisher brass faced amps and receivers, including the 101, X-101, X-101-ST, early 202 amps, Fisher 500B and most 500C receivers, they also made trannies for the rare
Madison Fielding 320 and 360 int amps. Todd made some of the best !
IT, much thanks! Add EIA number, manufacturer, and info to my list.
Remember, the unit uses a "full wave" voltage doubler B+ supply. I don't think any Edcor or Hammond stock item will do.
Talk to Heyboer about a rewind.
BTW, talk to Jim McShane about PSU upgrades. Another (IMO) good tweak is to replace the bass shy Fisher phono section with a tweaked RCA setup.
Eli D.
You could get the bad one rewound - Gary Brown does them, he's at the link below.
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