[ARC5] U.S. WW II equipment

[Sandy Blaize]

As I remember (correctly?) the ARN-7 was nothing more than assignment of 
later AN number to the old SCR-269G radio compass set.  The ARN-6 was a much 
better set and smaller and easier to work on.  Seems like we had ARN-6's in 
the F-86D interceptors.  Only thing that used the old SCR-269G and ARN-7 was 
our C-47 gooney bird.


73,
Sandy W5TVW

-----Original Message----- 
From: Mike Everette
Sent: Monday, July 01, 2013 10:12 PM
To: ARC-5 List ; Roy Morgan
Subject: Re: [ARC5] U.S. WW II equipment

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:
>
> >  ...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"  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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