[Milsurplus] Mystery Circuit

[Mike Feher]

Looks like it may be a 6U8 or 12BY7. Yep, 6AQ5s and 5763s. 73 – Mike 

 

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

908-902-3831

 

From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of mstangelo at comcast.net
Sent: Saturday, June 22, 2024 8:59 AM
To: B. Smith <smithab11 at comcast.net>; Milsurplus <milsurplus at mailman.qth.net>
Subject: Re: [Milsurplus] Mystery Circuit

 

A conversion of a type 42 amplifier into an 80 meter MOPA. The question is what type of miniature tube?  

  

I used to build 6AQ5 MOPA's in my pre-solid state QRP days. 

  

Mike N2MS 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20240622/a8730d3b/attachment.html>