[Hammarlund] nuvistaplug mod for sp600?

[Edward B Richards]

Hi Eugene;

Yes. There is a device you can use. Search the catalogs FOR A TEST
ADAPTER THAT PLUGS INTO THE CHASSIS SOCKET AND HAS ANOTHER SOCKET ON TOP
WITH CONTACTS TO THE PINS FOR TAKING IN-OPERATION VOLTAGE MEASUREMENTS.
(damn cap lock) .You would probably discard the upper socket. Hope this
helps. HNY

73, Ed Richards K6UUZ
Simi Valley, Ca 93065
Home of the Air Force 1 pavilion


On Thu, 29 Dec 2005 18:15:45 +0000 "Eugene Hertz" <ehertz at tcaf.org>
writes:
> Thanks to everyone who replied about this mod. Looks like 
> Nuvistaplugs are pretty much unobtainium so it looks like I will 
> have to build my own, two questions:
> 
> 1. I see on ebay that the tested Gm's of 6DS4 nuvistors vary some 
> between 8000 and 9000. What is the implication of GM to my

> application? Does a higher GM mean more gain? Does a lower GM mean 
> more noise? (or vice versa) Does any of this matter?
> 
> 2. Since it looks like I might have to build my own, does anyone 
> know where I might locate a 9-pin base that I could wire the circuit 
> onto and then plug into the V1 tube socket?  I wonder if there is 
> some kind of base that one can buy to allow prototyping on top of.
> 
> Thanks
> Eugene
> 
> 
> 
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