tubes age 73
Subject: Re: [R-390] Tube questions
Thanks. The only references that I have are the Sam's Substitution books 5 &
14, RCA Receiving Tube Manual, and an unknown manual that is very good but
has the covers torn off and I have no idea of the publisher. Still has a lot of data
though. Only some of the first few introduction pages are missing. I went back
and checked on the tubes that I was sorting through this weekend and noticed
that the GB tubes are Sylvania Gold Brand. GB 6DJ8, GB 5654, and
GB 5728. I guess I had so many new tubes that I didn't notice the few that were
in the Gold Brand boxes. I came across a lode of free tubes on Friday and
spent Sat and Sun sorting them out. The ends of the boxes are stamped with
the numbers as well as the tubes. Thanks to everyone for the help on the
scope tubes and the GB prefix.
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Date: Mon, 27 Aug 2001 09:19:12 +0000
Subject: Re: [R-390] Tube questions
Thanks. I guess I'll keep these as they are used in power amps and scopes.
Maybe I'll run across a VHF xmitter one day. The guy who donated these tubes
also has a Bogen M-120 tube amplifier. I forgot to ask what he wanted for it, but
it has 600 ohm down to 8 ohm inputs. He wasn't giving that away for free.
Didn't see the tube layout. The metal case is scratched up and has surface
rust. If he doesn't want too much I think I'll buy it to restore and use for the
boatanchors. It should be just right for R-390As and SP-600s.
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Date: Mon, 27 Aug 2001 11:58:49 -0500
Subject: Re: [R-390] Tube questions
I run a Bogen R-60 stereo receiver/amp in the shop, all tube early stuff.
Outstanding receiver. The boatanchor receiver rack is switched (3 inputs) to a
Bogen 30 watt tube PA amp with a huge Vu meter on the front. It sounds great
with the two 390A's and the JX-17. A fellow just can't take all that full, warm tube
sound and put it through a bunch of cold devices made from burnt sand!
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Date: Mon, 27 Aug 2001 20:58:12 -0500
Subject: Re: [R-390] Tube questions
One of the tube companies used the GB as "their" identifier kind of like
Amperex used Bugle Boy, GE used Five Star, RCA used "Command" etc. I don't
remember which one but if you don't get a reply from anyone, holler back and I'll
(14 pages)
(10 pages)
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