[ARC5] AN/ARC-3

[Bob Macklin]

When I was in Korea in 53/54 the ARC-3 was the command set in use in the Far 
East.

The crystals were not changed very often. We were told what the channels 
would be by 5th AF HQ. One channel was always 121.5.

I guess I'll have to watch eBay more often. Just what I need ! MORE JUNK!

 We also had ARC-5 VHF sets in the support aircraft.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>
To: <arc5 at mailman.qth.net>
Sent: Thursday, March 28, 2013 2:38 PM
Subject: [ARC5] AN/ARC-3


> Bob asked:
>
>> Has anyone ever seen an ARC-3 on eBay?
>
> They show up rather frequently, at least the R-77* and T-67*/ARC-3
> portion.  And going prices are typically very low...a few months
> ago I bought an almost NOS R-77B/ARC-3 with eight crystals for
> $30 plus shipping...typical prices for a set not highly sought.
>
> I admire the AN/ARC-3 design...it must have been a wonder for the
> radio techs, since it self-tunes with minimum tech intervention.
> In fact, it does that every time the channel is changed.
>
> If it had the guard channel and ten channels of the AN/ARC-1, it
> would have been almost perfect for the era, and much easier to
> re-crystal than the AN/ARC-1.  OK, maybe it would have also been
> better to require only one crystal per channel, and have everything
> built in one box including dynamotor supply too, just like the
> AN/ARC-1.
>
> There was an external guard receiver that was developed for the
> AN/ARC-3, and many R-77, all R-77A, and all R-77B/ARC-3 units
> had the RF connector for it.  But I've never seen any technical
> details, and it appears that it was dropped as a project.  Without
> doubt the shift to UHF-AM for military comms reduced the value
> of a guard channel for the AN/ARC-3, -36, and -49, even though
> some of those units stayed in USAF service at least into the
> late 1960s.
>
> Mike / KK5F
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