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How can I tell if a vintage receiver has tube amps
#325827 10/17/10 02:27 PM
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I'm looking for a receiver for the office and ran across an old Technics SA-505. I've found a reasonable amount of information, but nothing as to whether it is tube or solid state. When looking at some of these older units, how can I tell from the specs?

Scott


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Re: How can I tell if a vintage receiver has tube amps
a401classic #325836 10/17/10 02:51 PM
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Scott, here's a unit for sale out in Calgary, complete with specs. I don't know if it helps, or not....


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Re: How can I tell if a vintage receiver has tube amps
Adrian #325837 10/17/10 02:53 PM
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It's 63 WPC, built in 1980, and not made by McIntosh or one of the other esoteric brands. It's pretty safe to say it's not a tubed receiver.


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Re: How can I tell if a vintage receiver has tube amps
a401classic #325844 10/17/10 03:43 PM
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To add to what kcarlile said, it's my experience that mainstream builders of amplifiers sold and distributed in North America like Technics and other Japanese brands were entirely solid state from the 1970s onward.

In specs for a tubed unit, you might read the phrase "output taps for 4 ohms, 8 ohms, 16 ohms" for tube amplifiers that used output transformers, many of which did.

Alan


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Re: How can I tell if a vintage receiver has tube amps
alan #325872 10/17/10 11:42 PM
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Thanks. That's the kind of info I was looking for. I saw the one listed in calgary, but there was also one listed here in New Orleans, which prompted the question.


Scott

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