[ARC5] U.S. WW II equipment

[J. Forster]

The inverter was needed to power the loop indicator(s) and servo motor.

-John

============


> The only low plate voltage tubes in the ARN-6, as I recall, are the 28D7.
> The rest are normal 12 volt filament types like 12SG7, etc.
>
> And, the ARN-6 uses a vibrator to make high frequency AC for the antenna
> and indicator selsyns.  Except it's not all that high; maybe 130 cycles if
> I remember right.  It's been quite a while since I worked on an ARN-6; but
> I remember that it was a darn fine radio... much better than the ARN-7
> which it replaced, despite being lower in the nomenclature table.  And the
> 6 was a whole lot smaller and lighter.  Plus, it didn't have that
> screamin' meenie inverter to provide 115 volts at 400 cycles to run the
> receiver!
>
> 73
>
> Mike
> W4DSE
>
> --- On Mon, 7/1/13, Roy Morgan <k1lky at earthlink.net> wrote:
>
>> From: Roy Morgan <k1lky at earthlink.net>
>> Subject: Re: [ARC5] U.S. WW II equipment
>> To: "ARC-5 List" <arc5 at mailman.qth.net>
>> Date: Monday, July 1, 2013, 5:19 PM
>>
>> On Jun 29, 2013, at 5:04 PM, gordon white <gewhite at crosslink.net>
>> wrote:
>>
>> >Â  ...the Air Corps in early 1933 ... fly the air
>> mail in opencockpit biplanes in winter, and had a hard time
>> finding Cleveland, while at the same time those terrible,
>> "corrupt"Â  private air lines were doing the same routes
>> very well, …
>>
>> I just read "Wind, Sand, and Stars" by Antoin de Saint
>> Exuprey.  He tells about the some 7 years in the 30's
>> he was a pilot for the French mail service, flying in Europe
>> through (between, not over) the Alps, and later to and
>> across Africa.  The reader can get a very strong sense
>> of pride and admiration for the abilities, bravery, and
>> suffering of those pilots and crew.
>>
>> He does not say what aircraft they flew, but does mention
>> that they had no radios, and depended on lights at the
>> landing fields to find their way in.  They apparently
>> had damned little survival supplies, according to the tale
>> about how they flew into the ground in the desert, and
>> walked out for 4 days with no water.  They memorized
>> every "stone and stream" of their routes in order to
>> navigate.
>>
>> I have used dead reckoning to get back to the carrier from
>> 150 miles away in the mid-Atlantic with all navigation aids
>> and radios silent, the ARN-59 to find the beacon on
>> Nantucket from the same distance at seat night, and Gulf Oil
>> company maps to fly around New England on nice days.  I
>> can sympathize with the mail pilots trying to find
>> Cleveland.
>>
>> Boat anchor content:
>> The ARN-6 ADF radio used low plate voltage tubes, and ran
>> entirely on 28 volts DC.
>> Does anyone know of an on-line manual?
>>
>> Roy
>>
>> Roy Morgan
>> k1lky at earthlink.net
>> K1LKY Since 1958 - Keep 'em Glowing!
>>
>>
>>
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