Its fairly simple to convert the NCL-2000 to either a single 3CX800A7 or a
pair of Russian 4CX400's.
The last time I looked RF Parts had new Burle 8122's for around $450. The
USAF has released many Eimac 8122W's on the market, tube dealers were
bidding on bulk lots.
----- Original Message -----
From: "Manfred Mornhinweg" <email@example.com>
Sent: Tuesday, August 14, 2007 10:16 PM
Subject: Re: [Amps] Amps Digest, Vol 56, Issue 19
> Hello Sulaiman, John,
>> Another option you might consider is that the 8122 tubes are in
>> demand by people who are restoring old amps, like the NCL-2000.
> John has a good point there. I own a NCL-2000, which is working great,
> but I'm using it on the basis that if I kill the tubes, I will have to
> build or buy a new amp, because new 8122 are unreasonably expensive (a
> German company quoted it at 2500 Euros!).
> That's a consequence of RCA discontinuing this tube so long ago. I don't
> know if Burle is still producing it. They seem to have been the last
> manufacturer for it. In any case, if they still make it, they have a
> So it would hardly be a good idea to use this tube in a new design.
> Better make someone happy by selling him the tubes for his NCL-2000 or
> one of the few others that used it, and get some more current tube for
> your project!
> Visit my hobby homepage!
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