Re: [Milsurplus] Question(s) about TMC receivers
- You can find the STR-5 sales brochure here -
and the manual here
Here's my understanding:
Lots of HF links were fixed frequency - Military and govt. RTTY &
voice, the airlines overseas SSB channels, weather fax broadcasts,
etc. So the STR-5 might show up at airports, weather bureaus, local
and state emergency operations centers, embassies, as well as probably
more esoteric places. In larger Comm Stations there'd be a separate
receiver facility which might not be located where the operators were.
Volume & maybe BFO tuning were remotely controlled.
Normally they'd just leave a receiver at a particular frequency and
select among receivers to change channels. A receiver frequency might
be changed to make a substitute for maintenance purposes or perhaps
for some frequency changes from summer to winter (just guessing at
FYI - here's a Navy comm station with a wall full of TMC's earlier FFR
receiver, which was tunable but usually operated in crystal-controlled
fixed frequency mode.
On Mon, Feb 21, 2011 at 12:36 PM, <radioman390@...> wrote:
> I have a pair of TMC-made STR-5 "strip" receivers which I hope to
> soon. Basically its a rackmount HF receiver which uses plug-in
> subassemblies which control the frequency and mode. The plug-ins are
> rather sophisticated with a big crystal oven and a demodulator section.
> I've tried to figure out where and how they were used. I assume the
> receiver/power supply portions were permanently mounted in the
> operations are, and nearby (maybe under lock and key?) was
> a rack which contained multiple subassemblies, powered up to keep the
> ovens hot and the frequency stable. They'd change the plug-ins
> according to the mission need. Maybe they changed frequencies according
> to DEFCON levels?
> So I figure Cheyenne Mountain or maybe a WHCA site, but does anybody
> know for sure?
> The TMC website has the receiver listed, but the link to the photo is
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