[ARC5] Simple Question Arc-5 receiver power supply requirements?

[J. Forster]

I have probably missed it, but what is the 24 V current for the heaters in
a Command Set?

Actually, if anyone has the data handy, I'd like to know:

Filament current
Dyno current
Voltage at which the above are measured.

Thanks,

-John

========



> The output rating of all of the A.R.C. WW-II vintage single-band Command
> Set receiver dynamotors (i.e., RAT, RAT-1, ARA, SCR-274-N, AN/ARC-5 and
> AN/ARC-5X plus AN/ARR-2 and AN/ARR-2X) is 250 VDC @ 60 mA, not 80.
> According to
> some pubs, 10 mA of that was earmarked for auxiliary equipment like the LM
> and ZB or AN/ARR-1.
>
> In a message dated 12/04/2012 16:55:59 PM Central Standard Time,
> kgordon2006 at frontier.com writes:
>> On 4 Dec 2012 at 14:19, Bruce Long wrote:
>>
>> >and ebay and build multiple different power supplies, I decided to do
>> >a clean design from the ground up using ordinary Mouser- Digikey type
>> >parts which will allow me to make several identical supplies.
>>
>> Good ideer...
>>
>> >I thought the simple part would be to look up the voltage-current
>> >requirements but my efforts turned up a wide range of values.    The
>> >median seems to be 250vdc-80 mA and 28vdc - 400 mA obviously for
>> >receivers still wired for 28vdc filaments.
>>
>> IMHO, that 80 mA is the capability of the dynamotor, not necessarily the
>> requirement of the
>> receiver. The current drain for the B+ is dependent on too many things,
>> but mainly audio
>> power output. I recently checked several receivers here which I am
>> working
>> on. The
>> maximum B+ current drain at 250 VDC was 50 mA when both audio and RF
>> gainis were set
>> ot maximum. If you shoot for 80 mA, you will have ample reserve.
>>
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>