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[AMPS] SB-230 8877 Tube availability

To: <amps@contesting.com>
Subject: [AMPS] SB-230 8877 Tube availability
From: Hans_Brakob@adc.com (Brakob, Hans)
Date: Thu, 7 Dec 2000 13:25:38 -0600

Unless it's free, the SB230 would be real low on my list 
of amplifiers.  It's a very wimpy amp, maybe 500W CW, 900W 
SSB PEP.  I melted one down in a single weekend of SS CW
contesting back in the late 70's.

It runs a single 8873 (not 8877) conduction-cooled tube, and uses 
a dangerous (poisonous) beryllium-oxide block to thermally couple 
the tube to the heatsink. I think Eimac still makes the 8873, but 
it is spendy.  There might also be a Svetlana version.

Changing out to a different tube like a 3CX400A is probably not
a viable option, due to need to add a blower and air-plenum, plus
modify filament voltages, etc.

Save your money.

73, Hans, K0HB

-----Original Message-----
From: Carl Hyde [mailto:cshyde@yahoo.com]
Sent: Thursday, December 07, 2000 12:30 PM
To: AMPS
Subject: [AMPS] SB-230 8877 Tube availability



I have an opportunity to acquire an SB-230 that has not been used for four or
five years. It was working when last used. I am concerned over the availability
of the 8877 tube as I have heard that they are very hard to find and very
expensive. Can the SB-230 be converted to another tube and how bad is the 8877
situation? Thanks

=====
Carl HYDE
W2CSH
Remember, the opposite of PROGRESS is CONGRESS

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