[MRCG] WW2 vhf ground mobile (More)

[Tim]

Hi Bob - Well, I was one of the guys trying to work AF6IM while he was
parachute mobile with his BC-611.  He was approx 19 miles from me (home
QTH), optical line-of sight, and I worked him easily with a 1 watt HT on 2
meters FM.  Several times on a couple of jumps during the Pacificon events..

During the BC-611 jump I was running a GRC-9 to a reel antenna wire in the
back yard but I did not work him - and I tried pretty hard - I could not
hear his signal, even while the BFO was on listening for his carrier - no
joy, and I had a low local noise level during the experiment.. I don't know
if he heard me though, he reported QRM during the test.  I could hear a
station in Palo Alto (?) trying to call him ...
So that didn't work for me, although 19 miles, clear optical LOS is still a
stretch with a few hundred milliwatts from a very inefficient antenna (and
no "ground" nearby, LOL)  .  A great experiment nonetheless.... Many miles
LOS over seawater should be very easy and has been reported on by others.
Ground-to-air over very short distances (like to Tac aircraft) should
technically work but I think at a practical combat level, I'm doubtful it
would be useful....

Glider radios : weren't they employed because the twisted pair phone line
wound around the glider tow rope chafed through and failed on takeoff?  So
that link was glider- to- tow plane if I remember correctly?...You guys
know...

Sorry to hijack John's VHF jeep radio thread!

Tim
N6CC

On Sat, Sep 13, 2014 at 12:20 PM, Robert Burmeister <raburmeister at gmail.com>
wrote:

> Probably not. The technical manual (TM-235) does show a figure on P. 17
> showing one in use with planes (bombers) flying overhead, but this is not
> really close air support.
>
> FYI, we did an air-ground QSO with a BC-611 from a parachutist at Pacificon
> - see:
>
> https://www.ermag.com/index.cfm?v_link=product_detail&v_key=639
>
> A variant of the BC-611 was the main radio of the gliders in use in WW II.
>
> Bob
> AG6QL
>
> On Sat, Sep 13, 2014 at 12:03 PM, Tim <timsamm at gmail.com> wrote:
>
> > While we are at it, would a BC-611 been at all effective in Ground-Air
> > comms?  Particularly with close air support aircraft?   Methinks "not so
> > much".....
> >
> > Tim
> > N6CC
> >
> > On Sat, Sep 13, 2014 at 12:38 AM, Dennis DuVall <duvallddennis at gmail.com
> >
> > wrote:
> >
> > > John, et-al,
> > >
> > > The "official" system was the VRC-1 and included a jeep mounted (HF)
> > > SCR-193 (BC-191 xmtr, BC-312 rec.) and a 12 volt version of the (VHF)
> > > SCR-522.  Didn't come into use until Normandy and beyond.  Hard to
> > believe
> > > but up to that time there was no way for the grunts on the ground to
> > > communicate directly with the tactical support aircraft flying above
> > them!
> > >
> > > Information from the "Green" Books.
> > >
> > > Dennis
> > >
> > > ***************
> > >
> > > On Sep 12, 2014, at 6:56 PM, mac via MRCG <mrcg at mailman.qth.net>
> wrote:
> > >
> > > > The first use was with kluged up configurations utilizing SCR-522s
> > > "midnight requisitioned" from the Air Force.  The Signal Corps jumped
> in
> > > belatedly with an "official " version of the setup.  Don't remember the
> > > nomenclature off the top of my head but sure someone will jump in here
> > with
> > > that.....
> > > >
> > > > Dennis D. W7QHO
> > > > Glendale, CA
> > > >
> > > > ************
> > > >
> > > >
> > > > On Sep 12, 2014, at 5:34 PM, <boatanchor at martasystems.com> wrote:
> > > >
> > > >> Just starting to research what TX/RX equipment would have been
> correct
> > > in a WW2 Jeep for VHF aircraft communications. Anyone know or have
> ideas
> > ?
> > > >>
> > > >> Thanks
> > > >> John WB6AZP
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