#16
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I agree that tubes are difficult to find these days, with everything being solid-state, surface-mount components and such. However, it is possible to find old tubes (even real oldies such as 01As, et al.) if you look around. John Kendall's Vintage Electronics (www.vintageelectronics.com) in suburban Baltimore has many vintage tubes currently for sale at dirt-cheap prices; I've purchased tubes on that site for my vintage sets that I might not have been able to find elsewhere. I don't know if John Kendall has 01As or anything older than the late '40s, but he does have tubes from the '50s to the end of the tube era. One warning: While the price of the tubes on vintageelectronics.com may be low, the shipping charges, depending on where you live in relation to the Baltimore-Washington, D.C. area, could be quite high. I live in northeastern Ohio near Cleveland and found a shipping charge of something like $8 for my last order of tubes purchased from the site; the tubes themselves cost only about $2.25. This is shipping for tubes sent to Ohio; of course, shipping to other areas, especially to the West Coast, will be higher. Note as well that single tubes, even miniatures, will be shipped in large boxes, to survive the rigors of the USPS's automated sorting system. The reason tubes are not shipped in mailing envelopes, even padded ones, is precisely because of the automated sorting machinery. I was advised some time ago by an AK member that tubes sent in mailers would be crushed and/or smashed on their way through the sorting equipment, resulting in the customer receiving an envelope full of smashed glass and crushed metal.
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Jeff, WB8NHV Collecting, restoring and enjoying vintage Zenith radios since 2002 Zenith. Gone, but not forgotten. |
#17
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and the other filament string which has the 150 ma. filament tubes (50HK6, 50C5 and 12DT8 plus a resistor). I didn't learn till fairly recently that the 50HK6 has part of its filament as a fusible resistor for the silicon diode B+ supply (I know in other radios this is how the 50HK6 is used and presumably in this one too). I never could figure out as a kid why putting in 2 50C5's caused there to be no power. Even in 1984 although Radio Shack did have a tube tester and tubes in stock they still had to special order the 50HK6 tube for me. |
#18
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I kind of figured that out based on the shape of the plate. I looked up the 20EZ7 some time ago out of curiosity and found that it is indeed similar to the 12AX7. Makes me wonder why no one has bothered using them for home-made amps as a 12AX7 alternative. I bought a couple from AES and they were cheap as dirt.
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#19
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Several years ago, I had a big Motorola table AM/FM stereo radio with phono input. It was in a wooden cabinet with two fold out speakers and a built in center channel speaker. I think it used 6BM8's for output tubes. The dial glass on mine was cracked in several places and I ended up selling the radio on epay when I thought I needed money.
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#20
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Not exactly tabletop, but I got this last week. This one is stereo, but needs a rebuild.
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My gear- Sansui 500-Fisher 800c-HK Ballad-Eico HF-60-Dynaco MkII-HK ST-7- BIC 960- Mission TT and a bunch of other crap Last edited by sloober; 09-27-2009 at 10:46 PM. |
Audiokarma |
#21
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Growing up leads to growing old and then to dying, And dying to me dont sound like all that much fun... -John Mellencamp |
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