[Collins] R-388/51J mods

[Dr. Gerald N. Johnson]

On Tue, 2007-11-06 at 06:05 -0600, kingwood wrote:
> Greetings to all,
> 
>        Does anyone have any information on what was called the "Band 1 mod" 
> for R-388/51J's by Dallas Langford?  I have a receiver here that has way too 
> much gain on "Band 1".  I would like to find out what this mod consisted of 
> before I start tearing into the receiver.
> 
> 73 de K5JV
> 
> Lon W. Cottingham
> 1110 Golden Bear Ln.
> Kingwood, TX 77339
> 
> 281-358-4207
> 281-358-4234 FAX
> 281-795-1335 CELL
> 
http://www.geocities.com/amlogbook/newmembers/reprint.htm
offers to sell the article in a CD-ROM collection.

Says

> M054	51J/R-388 Band 1 Mod and AGC Mod (1) Dallas Lankford.  Improvement of Band 1 (BCB) sensitivity is 
> 	addressed, as well as a simple modification to improve AGC on AM.  7/90
> 
referring to the DX Monitor magazine, apparently July 1970, published by the International
Radio Club.

http://www.nrcdxas.org/catalog/reprints/ calls it reprint R64 and offers
to sell it for 20 cents.

That would probably involve the extra mixer stage used for the broadcast
band. Not what makes my 51J squirrelly.
-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer