[ARC5] U.S. WW II equipment

[J. Forster]

The smallest I've seen are about 2.5" OD and 5" long. And yes, 26/28 VAC @
400 Hz is right AFAIR.

-John

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



> Also seems to me we used to call the tiny inverters that powered the
> instruments "Peanut inverters" as they looked more like tiny servoes.  I
> think they supplied 28v at 400 Hz.
>
> 73,
>
> Sandy W5TVW
>
> That's been better than 60 years ago!  I must be getting old!
>
> -----Original Message-----
> From: J. Forster
> Sent: Monday, July 01, 2013 10:52 PM
> To: Mike Everette
> Cc: ARC-5 List ; Roy Morgan
> Subject: Re: [ARC5] U.S. WW II equipment
>
> 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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>
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