[ARC5] ARC-39

[Scott Johnson]

It has one 6159 in the final , with two modulating.  It only runs 400V B+,
and , like the ARC-5, is designed to match a very short antenna.  10-15 W
carrier is pretty typical.  Not about to hot rod it for no good reason, it
works well as is, and I have plenty of rigs that will run more power.  BTW,
I have been trying to compile a matrix of SAC HF equipment installed on
bombers and tankers, and it is a nightmare.  ARC-21, then ARC-65 on the
early models, ARC-58 on the G/H, the H now has the ARC-190, Tankers (KC-135)
had all three radios, (ARC-65, ARC-58, and now ARC-190), KC-97s had ARC-21,
then ARC-65.  I assume B-47s had ARC-21/65 as well.  Still don't understand
why SAC had only single HF system, when almost all MAC assets had two.
Especially since SAC depended on Big Talk/ Giant Talk.

 

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> 

 

From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf
Of D C _Mac_ Macdonald
Sent: Sunday, May 3, 2020 1:51 PM
To: arc5 at mailman.qth.net; Doran Platt <jeepp at comcast.net>
Subject: Re: [ARC5] ARC-39

 

With a pair of 28V 6146s (maybe modulators instead of RF amps) it should be
able to give you 75 and 40 meters with a fairly respectable signal all in
one box!  I'd also like to have one!

 

I believe the early B-52s HF may have been ARC-21s (AM) that were replaced
by ARC-65s (SSB) which were what were in the B-52F models I flew in back in
63-66.

 

73 de Mac, K2GKK/5

Since 30 Nov 1953

Oklahoma City, OK

USAF, Retired ('61-'81)

FAA, Retired ('94-'10)

 

  _____  

From: arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net>
<arc5-bounces at mailman.qth.net <mailto:arc5-bounces at mailman.qth.net> > on
behalf of Doran Platt <jeepp at comcast.net <mailto:jeepp at comcast.net> >
Sent: Sunday, May 3, 2020 15:30
To: arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net>
<arc5 at mailman.qth.net <mailto:arc5 at mailman.qth.net> >
Subject: Re: [ARC5] ARC-39 

 

Re-thinking my earlier post, it appears obvious now that the ARC-39 replaced
the ARC-2 for reasons other than progression of nomenclature.  It was in the
early 50's that aircraft radios used in both MIL and civil operations needed
to comply with the newer RTCA standards.  Radios like the ART-13 with the
Comco crystal modification and the intro of radios such as the Bendix
RT-series HF, the Collins 18S-4, and thence to the ARC-38, etc.  The old VFO
transmitters simply could not provide the required accuracy and stability.
So, its entirely possible/probable that the ARC-39 replaced the ARC-2,
illuminated by the fact that the airframes they were installed in were the
same.  I'd like to see/have an ARC-39.  Something new!!! 

Jeep K3HVG 

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