[Boatanchors] Re: [Hammarlund] correct manual for SP-600 JX-26

[James A. (Andy) Moorer]

The JX-26 is a later version of the "Direction Finder" model. It is the same 
as a later-model R-274C. It appears that all the later SP-600 serial numbers 
are either the DF design or the JX-17 "Diversity" model. There are a number 
of manuals that describe this receiver. Supplement A of the Hammarlund 
manual Issue-4 (October 1952) specifically covers models JX21 through JX26. 
It is also described (though not by that name) in TM 11-851. The schematics 
are in Figure 102 of TM 11-851. It is called "R-274C, serial number 1570 and 
above". The serial number they refer to is the Signal Corps numbers - not 
the original Hammarlund serial number.

All these manuals may be downloaded for free (requiring only great patience) 
from my SP-600 page:
http://www.jamminpower.com/main/sp600.jsp

Enjoy!
James A. (Andy) Moorer
www.jamminpower.com



----- Original Message ----- 

> Hi All,
>
> I just received a restored JX-26 from Phil Atcherly which is a great 
> receiver and he does great work BTW unfortunately mine is the last big 
> receiver he'll do I guess, something about back and ouch?. What is the 
> correct manual for this radio, I see many for JX-21's but none for this 
> one, were they ever made? Should I just get the generic TIM etc. manual 
> for it? Can this radio be run with a balanced antenna? I now know why 
> everyone raves about these things, what a great radio.
>
> Bob Young
> Millbury, Ma
> assorted anchors, most Hammarlund
>