Edwynn
Posts: 4105
Joined: 10/26/2008 Status: offline
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quote:
ORIGINAL: njlauren There are sites on the web that have manuals for old audio units, I found the manual for an old Harman Kardon tube AMP I am trying to get to work. Good news is there are places to get replacement tubes if the ones in it blow, and they aren't prohibitively expensive. If you decide to try the turntable, make sure to get a new stylus for it. If it's an old unit, definitely replace the rectifier tube, before all else. But then save the tube and take it in to a qualified tube amp technician and have him test it. In the highly unlikely event that its a Western Electric 274B tube, you've got $200-400 in hand, right there. Just shows you how crazy the market is for some select tubes designated as 'GOD!' by the Japanese audio nut cases. Fortunately, as you say, the vast majority of tubes available today are reasonably priced. In any case, my aunt and uncle bought a Zenith tabletop radio set (which included inputs for turntable, microphone, tape machine, etc.) in 1955. In 2003 the thing stopped working. They took it in to the local repair shop, wherein the current techs found themselves utterly bewildered. They called up a retiree from that shop. He drove in, looked at it, did the "usual suspects" of metering this and that, and replaced the rectifier tube. Didn't touch anything else. Viola. The radio still plays, every day, here in 2013 and likely for a good while beyond.
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