small valves - test-drb@ccmp.vtda.org

22 Apr 2005

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Subject: Re: small valves
   From: "Bob Shannon" <bshannon at tiac.net>
   Date: Fri, 22 Apr 2005 19:00:24 -0400
     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at
classiccmp.org>

I've not been into R/C stuff, but I am into 'submini' tubes.

I recently built a 5-tube regenerative receiver for the 49 meter band using
5678's for the 2 stage tuned RF amp, detector, and first audio amp.  A 5676
serves as the final audio driver. 
Can you send me a schematic you used?  I must have 20 of those, as well
as 1AD4 and 5672s. I was forturnate that someone gave me a bunch of them
and I've found them fun to play with. I've done a single tube regen (160m)
with it and stuffed in a small tin.  I run it on an AA cell and three 
9v batteries. 

...
 This is my fourth tube based radio.  A friend was
joking that these 
recreations sould be known as 'bunker buddies' 1 thru 4, as they
use no semiconductors at all. 

;)  I have several tube sets I've built as a result of parts being 
avaiable.  They are interesting to me.  I started my career with 
tube, hybrid and full solid state commercial two way (VHF/UHF) equipment
so this is retro for me.  A different challenge than solid state,
fun none the less.

Allison
KB1GMX