[ARC5] ARC-39

[Steve Gomez]

Ten years ago I was re-installing the radio operator's position in a C-47
inside of a wooden WWII hanger in Frederick, OK. BC-375 and BC-348. The guy
assisting me was an airline pilot and after we fired up the receiver on the
original liaison wire antenna he asked if it would receive frequencies
around 8 MHz. I said sure so we listened to some sideband chatter that was
actually airliners giving Gander Newfoundland their mid-Atlantic position
reports. We were both rather taken aback sitting there in our time machine.

 

From: arc5-bounces at mailman.qth.net On Behalf Of David Stinson
Sent: Saturday, May 02, 2020 6:10 PM
To: Scott Johnson <scottjohnson1 at cox.net>; 'ARC-5 Mail List'
<arc5 at mailman.qth.net>
Subject: Re: [ARC5] ARC-39

 

HF aircraft radio continues to this very day.  It was still very active
outside the U.S. in the 60s.
That said, HF's long service in aircraft is finally in its twilight.  When
we sacrifice enough human lives to the God of Technological Advance, maybe
they'll rethink casually discarding simpler systems that have worked for 100
years.  But I doubt it.

On 5/2/2020 12:59 PM, Scott Johnson wrote:

I figured there has been a lot of talk lately about various ARC-5 precursors
and derivatives. But not much talk about one of the coolest of ARC's
creations, the ARC-39.

 

Here you have the equivalent of a full complement of ARC-5 HF gear in one 1
ATR ARINC box, with presets, and internal power supply.  Everything you
needed for a command radio function, about ten years too late.  I often
wonder what the Navy did with this radio.  It was apparently deployed on
training aircraft such as the T-34, T-2, etc., as well as the P3A and UH-43.
I have three examples, all were built under a 1959 navy contract. Does
anyone know why this radio was contracted?  I sure is cool, with 12 preset
crystal controlled channels in the 2-9.1 MHz range, two 6159s (28V heater
6146) modulating one 6159. Balance of tubes are 7/9 pin miniature. Modular
construction, typical very high quality gold plated ceramic wafer connectors
internally. 10-15W carrier with 95% plus modulation.  Can be operated
locally or remotely.  Very sensitive, selective receiver.  Any old Navy
Airedales out there that know anything about the application of this set?
Seems much too late for HF interplane or air to ground.

 

Scott V. Johnson W7SVJ

5111 E. Sharon Dr.

Scottsdale, AZ 85254-3636

H (602) 953-5779

C (480) 550-2358

scottjohnson1 at cox.net <mailto:scottjohnson1 at cox.net> 

scott.johnson at ieee.org <mailto:scott.johnson at ieee.org> 

 





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