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Re: [Amps] NCL-2000 retube

To: Paul Decker <>
Subject: Re: [Amps] NCL-2000 retube
From: Radio WC6W via Amps <>
Reply-to: Radio WC6W <>
Date: Thu, 18 Aug 2022 22:13:41 +0000 (UTC)
List-post: <>
Hi Paul,
 Hmmm ...

 The physics of such a transplant would be problematic. The 4CX1500B is quite a 
bit larger in all dimensions than the original parts. 

 You might consider a pair of 4CX350A's. A socket change would be required. 

 The pair, with the heaters run in series, might just work with the existing 
heater transformer; or a small series R may be required to set the proper 

 I don't know, here in the inflationary 3rd millennium, whether 4CX350A's are 
any more available that the old 8122's.

73 & good afternoon,
 Marv WC6W 

     On Sunday, August 14, 2022, 05:22:22 AM PDT, Paul Decker 
<> wrote:  
 I have an NCL-2000 that both 8122's are bad.  I've also got a pair of 4cx1500b 
and sockets.

On paper, it looks like a single 4cx1500b would be a heater transformer.

Has anyone tried this?  comments, thoughts?

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