Guard Channels (was [Milsurplus] RE: Nutso (RE: WW2 B-29 VHF radio?)

Tue, 5 Feb 2002 10:07:53 -0800

Hi All, that would likely be because many of those Guard Channels 
are still in use. As such, even if there previously were 'unclassified'
copies of the frequency matrix for guard channels, they would now
be 'destroy' or 'recover' status. 
        Likely you won't find it except some of the lend/lease gear that
is still bouncing around. We used, for example, some of the guard
frequencies
currently assigned to MARS operations during the initial response phase
of
9/11. 

73 de John
John Jewkes, W6HNC/AAA0OR OR
State Director Oregon, US ARMY MARS
ARES/RACES/MARS liaison Officer

On Tue, 5 Feb 2002 08:41:54 -0500 "ROBERT W. DOWNS"
<[email protected]> writes:
> Mike, Marty, Group
> 
> The RT-18/ARC-1 and RT-58/ARC-12 both have two complete receiver 
> front ends
> (RF Amp, Mixer & HFO/Multiplier Chain), the outputs of which are 
> paralled
> into the 1st IF Amp.  However, nowhere in either manual can I find 
> a
> mention of the actual frequency or frequencies of the guard 
> channels.  They
> just say that the guard channel subassemblies cover a narrow range 
> of
> frequencies, and that the radios come from the contractor set up on 
> the
> guard channel frequency required by the contract.
> 
> The AN/ARC-3/36/49 manual mentions a modification to the R-77/ARC-3 
> and
> R-428/ARC-36 adding a connector for the purpose of connecting the 
> 12MC
> output of the guard channel converter (no nomenclature given that I 
> can
> find).  The receivers became R-77A and R-428A.  That's all that I 
> found on
> the subject.
> 
> 73
> Robert Downs
> <[email protected]>
> Houston
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> 

John Jewkes, W6HNC/AAA0OR OR
State Director Oregon, US ARMY MARS
ARES/RACES/MARS liaison Officer
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