[MRCA] GRA-39 Gilbert Ops Walt Started this

[Walt Skavinsky]

Breck,

I plan to bring my gra39 and have it connected to the shelter with my prc25.   I have a new addition to the project I just got a gra6 set and after a little TLC it is working.   I plan on connecting it to a prc47 or a prc41 not sure yet.   So if we can hook it into the switchboard that would be great I too am short of wire but I have been  substituting speaker wire.   I am also interested in experimenting with a retrans kit with a diplexer cu2194.    

Walt



On August 18, 2014 3:09:57 PM EDT, "B. Smith" <smithab11 at comcast.net> wrote:
>          I was impressed and inspired by Walt's GRA-39  setup last 
>year, so he gets credit for having the first GRA-39 operation at 
>Gilbert. He used one to go from his inside ops to his commo trailer 
>outside the building to run a VHF set. (I have his demo on video if I 
>can every finish the Gilbert 2013 web pages) I pulled my sets out last 
>month (purchased several years ago at Gilbert for $5 bucks a box) and 
>did some testing. Bad thing about the operations of each unit  - - the 
>remote and the local control require 6 D cells each. I found one really
>
>corroded battery box but found a replacement on ePay. The sets uses a 
>1500 cycle tone for control so a "direct pair" line is not necessary.
>
>During my testing I found that each unit can easily run off of a small
>9 
>volt battery, current draw on the 2329 Local Control  was nil on
>receive 
>and 20-25 ma on transmit (relay closes), so that 9 volt battery should 
>last quite a while. On the  2328 Remote the current draw is a little 
>higher, 10 ma on receiver and approx 30 ma on transmit.  Both sets have
>
>On and Off switches to conserve power, the manual ringer/buzzer still 
>works without power to alert the operator to turn his set on.
>
>A couple things I would like to try is see if you can parallel two
>Local 
>Control units.  In addition I would like to try the wiring interface 
>between the GRA-39 Remove Control and the SB-22 and use the switchboard
>
>to connect the system to different "subscribers" (that's teleco talk) .
> 
>And to use the set for HF ops. See diagram below.
>
>Speaking of batteries, I need to hit the local dollar store and scoff
>up 
>a supply of cheep D cells for all the phones etc.     :-)
>
>GRA-39 to SB-22 diagram below.
>
>Z

-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.
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