[MRCA] ACR-5 Mobile

[Al Klase]

Thanks Meir,

I think I'm leaning in the direction of #2.

Regards,
Al

wf2u at starband.net wrote:
> Al,
>
> There is no MD-7 dynamotor for 12/14 Volts...
>
> Your options are:
> 1.  Install a 24 VDC genearator in your vehicle, with a charging system
> for 24 V batteries (independent of your original 12 V system), and use
> that to power up your 24 V radio equipment.
>
> 2. Get a military surplus (they appear on ebay quite frequently) 12 V to
> 24 V solid state inverter - they have 15 A current output if I recall -
> feed that through a diode to 24 V batteries (as to prevent the batteries
> to pump voltage into the inverter and to trickle charge the batteries) and
> feed that to the ARC-5. The starting current of the dynamotor is way
> higher than the 10 A max steady state current - it can be easily 5 times
> or more momentarily - so you want those batteries connected, because
> they'd supply the starting current.
>
> 3. Find the 12/24 VDC input dynamotor supply for the TCS and feed the
> ARC-5 modulator/TX and RX with the high voltages from that supply
> (kluge...) but you'd also have to rewire/retube the ARC-5 equipment for 12
> V...
>
> You should get at least double the 15 W rated power output (the rating
> means guaranteed for 15 W minimum at the minimum  voltage of the battery,
> before recharging).
>
> Good luck and have fun!
>
> 73, Meir WF2U
> Landrum, SC
>   
>> Troops,
>>
>> I'm starting to contemplate taking a stock AN/ARC-5 mobile so people can
>>  see and hear it.  This would be a single transmitter and receiver,
>> probably on 75 meters, plus an MD-7 modulator, RE-2 antenna relay, and
>> control boxes as needed.  I have all of above, but need a single
>> transmitter rack and mount, MT-68/69.
>>
>> Does anyone know the actual output of the TX?  Manual sez 15 watts
>> carrier, but I suspect a pair of 1625's with 550 on the plates should do
>>  at least twice that.
>>
>> Also, there the issue of primary power.  I'm looking for a good way to
>> get 28 volts at about 10 amps from 14 volts with enough reserve to spin
>> up the TX dyno.  I don't suppose anyone has 12/14 volt dynomoters for
>> MD-7 and RX lying around?
>>
>> Any help or suggestions appreciated.
>>
>> Regards,
>> Al
>>
>> --
>> Al Klase - N3FRQ
>> Flemington, NJ
>> http://www.skywaves.ar88.net/
>>     
>
>
>
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>   

-- 
Al Klase - N3FRQ
Flemington, NJ
http://www.skywaves.ar88.net/