[Amps] WTB: Matched pair of 8122 or 8122W's

[Carl]

Several manufacturing issues. Pre mid 1967 the screen was not supported and 
when running current would lean into the anode.
Other problems were incomplete gettering and a short try at pink ceramic 
which RCA used OK with even larger tubes. I doubt they told anyone at 
National the full story but it gave the amp a very bad reputation.
Burle took over around the late mid to 80's when RCA went belly up.

Carl
KM1H


----- Original Message ----- 
From: "Randall, Randy" <Randy.Randall at uchealth.com>
To: "Carl" <km1h at jeremy.mv.com>; <amps at contesting.com>
Sent: Thursday, September 19, 2013 5:47 PM
Subject: RE: [Amps] WTB: Matched pair of 8122 or 8122W's


Just out of curiosity, what is the issue with RCA 8122's in the 60's other 
than age?  Were there manufacturing issues???

Thanks,
Randy

Please note:  Upcoming Vacation: December 21 - January 5, 2014



Randy E. Randall AB9GO
Network Architect
UC Health
Randy.Randall at UCHealth.com
Phone 513-585-7146
Fax 513-585-7159

-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Carl
Sent: Thursday, September 19, 2013 3:12 PM
To: amps at contesting.com
Subject: [Amps] WTB: Matched pair of 8122 or 8122W's

Burle and Eimac preferred, NOS in sealed boxes or guaranteed good, full 
output used OK with no screen current drift.

RCA's must have stable screen current, NOS or used, no 60's date codes.

To be used in a fully rebuilt NCL-2000.

Carl
KM1H

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