RadioBanter - View Single Post - RCA tube #UY-227 question

December 6th 04, 05:15 AM

In article ,
(Nc183d) writes:

I have a few N.O.S. RCA UY-227 tubes. Is there any use for these anymore or
am
I holding onto them for no good reason? Are they worth anything at all? I
think
that several years ago, I heard them referred to as "heater" tubes. I didn't
know that anything got hotter than a good old metal 6L6 tube....

The '27 was the first commercial indirectly-heated cathode (hence "heater")
triode, as opposed to tubes whose filament emitted the electrons (26, 45, 71A,
etc.).

A 27 doesn't get very hot. They make good audio preamps and drivers (in late
1920s to early 30s radios) and also RF amplifiers and above all, oscillators in
superhets.

They're common enough not to be worth a lot, BUT, since you mentioned "UY", you
probably have the "globe" or "ballon" shaped glass envelope, which makes it
more valuable (maybe $10) to an antique radio restorer, who wants the vintage
look. I really love that old glass shape.

Anyway, try to sell them to a vintage radio guy. Advertize them in
rec.antiques.radio+phono, or put them on eBay. --Mike K.

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