[Milsurplus] Re: [ARC5] What did they talk to ??

[Bob Macklin]

In 1956 during the Suez crississ, our wing (27th SFW F-84Fs) was flying
cover for 12th AF B-47s out over the Carribean. The F-84s were flying at
39000 and the B-47s were probably about 45000.

We were in Austin, Tx. The B-47s were from McDill at Tampa. Our radios were
ARC-27s(UHF), The Wing CO of the F-84 Wing called the tower at McDill and
told the controller to inform the 12th AF CO that if the B-47s did not come
down to 39000ft theat the fighters were going home.

We copied this exchange in the radio maintence shop at Bergstrom, AFB,
Austin, Tx. That was a good example of how altitude effects the range of
VHF/UHF radios.

If I recall correctly the finals in the ARC-27s was a pair of 2C39s. Anyway
they were not large tubes.

Bob Macklin
K5MYJ
Seattle, Wa.

----- Original Message ----- 
From: "Mike Morrow" <kk5f at earthlink.net>
To: "ARC-5" <arc5 at mailman.qth.net>; "Milsurplus"
<milsurplus at mailman.qth.net>
Sent: Monday, May 02, 2005 7:37 PM
Subject: Re: [Milsurplus] Re: [ARC5] What did they talk to ??


> >Also the question was asked about the max range of the SCR-522 on VHF.
>
> Many of the WWII airborne VHF set operating instruction manuals contain a
graph of line-of-sight miles vs. aircraft altitude, and that range was
pretty much independent of the power output of the transmitters.  The graph
that's in the manual for the AN/ARC-4 (AN 08-10-245), for example, gives the
following:
>
> Altitude (ft)     VHF LOS Range (Statute Miles)
>
>   1000                  40
> 10000                 115
> 30000                 210
>
> Mike / KK5F
> _______________________________________________
> ARC5 mailing list
> ARC5 at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/arc5
>