[Hammarlund] first SP-600 JX-26

[Les Locklear]

The model or "suffix" number has nothing to do with it may or may not have 
black tubular capacitors. The serial number is the key indicator. Any SP-600 
with a serial number of 175XX or higher came from Hammarlund with ceramic 
disc capacitors. All SP-600's were built with consecutive serial numbers 
independent of model/suffix number.

Many times you will see a JX-14 with a higher serial number than say a 
JX-26. They built the majority of them from 1951 to 1960, then production 
slowed way down. The last ones built were the rare JX-21A with 22 tubes and 
a product detector.

Les Locklear
Monitoring Since '57
Located On the Gulf of Mexico
Gulfport, MS.
http://www.hammarlund.info/homepage.html

----- Original Message ----- 
From: "Bob Kulow" <kulow at epix.net>
To: <hammarlund at mailman.qth.net>
Sent: Wednesday, March 08, 2006 5:37 PM
Subject: RE: [Hammarlund] first SP-600 JX-26


<snip>
 If I'm not mistaken, JX-26's generally
> have all ceramic disk caps, and no (or few) "black
beauties".

I have a 'JX-26 and it was just /loaded/ with
BBOD's.  It took 2 weekends to replace them all (I
suspect I may have missed one or two, but it still
works after 17 years) but it was well worth it.

Don't even /think/ of trying anything to it until
you replace the caps.  Don't even use the set until
you do.

73
Bob WA2UEH

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