Help required with - R/T Remote Control GRA 990

[Barrie Richards]

R/T Remote Control GRA 990
C-991

Help !

Can some one please tell me what this is ?

I have acquired one but don't know what it does.
I 'assume' it is a remote control for a PRC25/77 ?

If so how do the two connect ?
What is the cable/plug which connects to the 'Remote' socket ?

Thanks, in anticipation
Barrie
S.Wales.

[Barrie Richards]

I thought somebody on here would know ?

[wa5cab]

Barrie,

Check the nomenclature again. At best, what you wrote is incomplete and has typo's. The remote control set normally used with AN/PRC-25/77 and AN/VRC-12 family was AN/GRA-39. Main components of which were C-2328/GRA-39 and C-2329/GRA-39. AN/GRA-nnn never got much above 100 (and most were antenna groups). Yet C-99n/xxx range was reached circa 1954.

Unless the items are foreign, in which case respondent sayeth nought.

Robert

[Barrie Richards]

Robert,

Thanks for the reply.

The metal case of the unit is the same size as a PRC25/77 and uses the same battery box.

Mine still contained a 13.2 volt rechargeable ni-cad. Battery was quite dead and when opened up contained 11 'D' cells.

The front of the unit has a speaker to the left. Across the lower front a 'power' switch marked 'ext/off/Intl', an orange 'call' light, standard PRC25/77 'audio' socket and a '24 VDC' three pin input socket, twin 'line' plug.

Across the top, left to right, An 'alarm' switch 'on/off', 'rotary Volume' control 'Function' control marked 'Radio/Tel/Ring' and a 'remote' multi pin socket.

Between the Function control and the Multi pin Remote connector is a small metal flap which opens to reveal two switches. The top is marked 'SENS', lo/mdm/hi. The lower is marked 'RF LVL' lo/hi

On the top edge of the unit there is a data plate, which looks 100% original and clearly reads -

'R/T Remote Control GRA-990
C-991
MFG No. 6499100 Serial No. 2107'

Thanks for any info

[wa5cab]

Barrie,

OK. I haven't a clue, except that I can see why you thought it might be an AN/PRC-25/77 accessory. I don't do much with what I consider the later radios (despite the fact they're 40+ years old!) but maybe someone with a clue will read your detailed post and respond.

Robert

[Bill Strangfeld]

Robert's suggestion that it's non-US may be right. Google found a listing for the GRA 990 here, next to one for the GRA 39B:

http://www.zuritc.com/catsheet300.html

Crawling up the directory to Zuritc's home page shows that Zuritc is an Israeli company which sells parts for obsolescent communication items.

http://www.zuritc.com/

So the GRA-990 might be Israeli. Are there any manufacturer's tags externally or internally which add info? Tadiran would prove it's Israeli.

[Barrie Richards]

Bill,

Thanks for the reply. That was all I could find on a 'search'.

Haven't opened the unit up yet however all the exterior labelling is in English. [American!]

Wrtitten on the blanking plug for the multi pin connector and 24 volt input blanking plug is 'Glenair Inc'

Don't know if that helps at all.....................

[wa5cab]

No. Glenair, Inc. is a connector manufacturer in Glendale, CA.

[Barrie Richards]

I don't know if this will help ?
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[Barrie Richards]

One day I will get the hang of these photo's !!!!!!!!!!!!!!!!!!!!

[Barrie Richards]

Hunting thro' the garage yesterday I came across this unit and thought I try and find some info, again....

Imagine my surprise when the only thing 'Google' bought up was this post from ten years ago !

Anyone any ideas ?

[brian in denver]

found this in google books
https://books.google.com/books?id=SfbbA ... IQ6AEIKDAA