[Milsurplus] SC-901X questions

[Bob kb8tq]

Hi

One of the fun things growing up was an outfit named Glenwood Sales. From the name you 
would *think* they were in the business of selling stuff …. not so much. What they did was 
store stuff for the Stromberg Carlson / General Dynamics / Whom Ever empire. Much of it
was very obscure. You could wander around the aisles and pick up this or that. You then 
went up to the counter to find out if it could be purchased (or not) and what the price might 
be today. If the price was a bit high or it wasn’t for sale, the drill was to try again in two weeks.
It’s been almost 50 years since I was last there, I’m sure it’s been gone a long time. My guess is 
that whatever one needed for a SC-901 repair was somewhere on some shelf ….

Bob

> On Mar 26, 2018, at 1:11 PM, Jim Whartenby <antqradio at sbcglobal.net> wrote:
> 
> Hue
> Per WB6NVH, circa February,2010:
> "SC-901 and the 900 series as a whole were the prototypes (of the R-1051 family of radios by General Dynamics) designed around 1961 by Stromberg Carlson.  They were typically installed in ICBM silos and you will see them in some of the photo collections on the web.  For example, that silo south of Tucson, Arizona, now a museum, still has them in place. Presumably SC- means Stromberg Carlson."
> Geoff
> 
> According to Wikipedia, SC was bought by General Dynamics in 1955.  Interesting to note that the SC-901 was designed only a few years after the ARC-58 / KWT-6 / URC-32 family of radios went into production.
> 
> Not really aware of any overheating issues other then the extra heat produced by the regulated power supply when the power transformer tap is not properly set.  Same can be said of the FRR-21, 22, 23 and SRR-11, 12, 13, all of which run much cooler when the power transformer tap is adjusted to the actual line voltage.  The latter will run even cooler when the 400 cycle power transformer tap is also used.  From my measurements, the 6.3 vac filament are at just above the minimum spec of 5.8 vac when the line voltage is 123 vac.
> Jim
> 
> 
> From: Hubert Miller <Kargo_cult at msn.com>
> To: Military Surplus Mail List <milsurplus at mailman.qth.net>; "armyradios at yahoogroups.com" <armyradios at yahoogroups.com> 
> Sent: Monday, March 26, 2018 4:26 AM
> Subject: [Milsurplus] SC-901X questions
> 
> Found an SC-901X exciter that I'd quite forgotten I owned.
> 1. What to do for a manual? Google finds nothing.
> 2. Is it worth trying to get working?
> ( Yes, I have in the past read about the overheating failures. )
> thanks-  Hue
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