[MRCA] GRA-39 Gilbert Ops Walt Started this

[B. Smith]

I would certainly try the group of 9 volt batteries, certainly it would 
hold up enough for the duration of the rally.  A single 9 volt battery 
is a great energy source.
Incidentally I tried using 9 volt batteries in the GRA-39 and it worked 
great.
A lot easier than stuffing 6 dollar store D cells in the box.

On 8/29/2014 12:17 PM, KA1LHZ wrote:
> Does anyone have experience with building a BA-414 to use in the 
> remote of a GRA-6. I'd like to use mine with my MSC-37 comm shelter. I 
> thought about using a series parallel group of 9 volt batteries but am 
> not sure what the current draw is. I want to try using the GRC-106 
> remotely through the SB-22 switchboard. I did have the C-434 mounted 
> under the radio with the old style slide in mount but removed it for 
> weight reduction.
> Steve
> KA1LHZ
>
> On 08/18/2014 08:14 PM, Walt Skavinsky wrote:
>> 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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>
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