7199 tubes
David Suess
: Can someone verify this? A local tube amp shop says that the Russian
: 7199's work great (although their speciality is guitar amps), and I have
: both a ST70 and a Crown open reel deck that really need some new
: sets.
: In lieu of 7199's I was going to drop the Sound Values 6GH8A board into
: the 70, but I am at a loss at what to do for the Crown. Anyone know of
: a source for NOS 7199's?
Don't know much about the Crown RR deck, but it should be a simple matter
to reqire the tube sockets to accept either the 6GH8A or the 6U8A. Note
that both of these tubes have the same pinout, but slightly different
charasterics. The main difference between them and the 7199 is
availability.
If anyone is interested, I can/will post the tube pinout modifications
to accomplish this.
+---------------------------------------------------------------------+
david suess (david...@medtronic.com)
medtronic. inc. (t374)
7000 central avenue ne "Carpe a body that will last as long
minneapolis, mn 55432 as your will to run..."
+---------------------------------------------------------------------+
Dirk Wright
: I can also verify that 7199's, and the 6GH8A's that they can be replaced
: with (following a little pin-play) aren't reputed to be worth a hoot.
: They're both "television tubes", not "audio tubes". (To me, they look like
: "vacuum tubes", but they don't fit in my Hoover.) I have yet to do any
: sort of comparison, but I'm actually using 6GH8A's right now, and they
: sound good enough to keep me content for a few months.
Yo! wait a minute! The 7199 was specifically designed for AUDIO! The RCA
adds at the time the 7199 was introduced were directed at audio designers.
Regards, Dirk Wright
jj, curmudgeon and all-around grouch
>Yo! wait a minute! The 7199 was specifically designed for AUDIO! The RCA
I'll verify this. My RCA recieving tube book mentions that it is
particularly designed to be quiet for audio use.
My experiences aren't that positive though, the triode barely
has enough voltage swing to be a good phase splitter, which is
what it's marketed (was marketed) for.
It was supposedly a HiFi amp tube, pentode input stage and
triode splitter in one package. I once built an amp using
it and a pair of 7868's. It worked. It was out of an old
rec. tube handbook, and it had mega-problems with the stupid cathode
bias it used for the output stage as well.
I still have this huge, wonderful old T-M output transformer it
used.
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