[MRCA] 10 meter FM freqs.

Dennis spike.dennis at yahoo.com
Fri Dec 17 12:49:11 EST 2010 

FYI the defacto Mil 10mtr FM freq was established a long time ago as 29.6mc 
because of the ability to use the VRC-12 family radios here. Nick-named "Red 
Flag" channel, many VRC-12's will tune down one click under the normally 
30mcLPF. This resulting in a red flag popping up in the freq window. This was 
used a "party channel" in Vietnam by those who knew that it existed(not many 
people did).

In later years, k9wt, wa4vag, ki0pf & others, used it as their coast-coast 
intercom freq when the band was open. All of them using RT-524s. Note, not all 
RT-524's are capable of this.

Please correct me if I have any of this wrong.

 Dennis Starks
Military-Radio-Guy
KB0SFP
Monitor(all USB): 
3996, 5403.5, 7296, 14342.5, 18157.5



----- Original Message ----
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> Sent: Fri, December 17, 2010 11:00:48 AM
> Subject: MRCA Digest, Vol 80, Issue 7
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> Today's Topics:
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>    1. Re:  10-Meter FM (B  Smith)
> 
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> ----------------------------------------------------------------------
> 
> Message:  1
> Date: Fri, 17 Dec 2010 08:52:13 -0500
> From: "B Smith" <smithab11 at comcast.net>
> Subject:  Re: [MRCA] 10-Meter FM
> To: "MRCA" <mrca at mailman.qth.net>
> Message-ID:  <D3C3B3F4D1A0443F97384308BAC9ED47 at Dell560>
> Content-Type: text/plain;  format=flowed; charset="iso-8859-1";
>      reply-type=original
> 
> I don't think any fed agency really cares about 
> wide band FM below 29.0, If it bothers you just 
> either turn the  deviation down  when transmitting 
> or  don't talk too loud.  I  seriously doubt if the 
> Feds are monitoring for this  violation.
> 
> --------------------------------------------------
> From:  "Gene Smar" <ersmar at verizon.net>
> Sent: Thursday,  December 16, 2010 11:56 PM
> To: "Al Klase" <al at ar88.net>; "Military Radio 
> Collectors  Association" <mrca at mailman.qth.net>
> Subject: Re:  [MRCA] 10-Meter FM
> 
> > Al etal:
> >
> >     Before we  jump into 10 FM using milrads, 
> > remember:  these old green
> >  radios are wideband FM.  That modulation is not 
> > permitted on Ham freqs below
> > 30 MHz.  We can get away with it on 6M and 
> >  above.  I'll check the FCC Rules
> > over the weekend (it's nearly 12M  here now.) 
> > But IIRC, the Rules section on
> > permitted modulation  describes the math used to 
> > determine index of
> > modulation or  some such thing which must be less 
> > than 1 below 30  MHz.
> >
> >     Stay tuned.
> >
> >
> > 73 de
> > Gene Smar  AD3F
> >
> >
> > ----- Original Message  ----- 
> > From: "Al Klase" <al at ar88.net>
> > To: "Military Radio  Collectors Association" 
> > <mrca at mailman.qth.net>
> > Sent:  Thursday, December 16, 2010 8:33 PM
> > Subject: [MRCA] 10-Meter  FM
> >
> >
> >> The recently released MRCG (West Coast MRCA) 
> >> field day video sparked a
> >> 10-meter FM discussion on  today's C/LRRP Net.
> >> http://www.youtube.com/watch?v=aUKl9BdsvUc
> >>
> >> So,  we'll try to support such operation at 
> >> future MRCA  gatherings.
> >> We're talking the "armor" frequency range 27.0 
> >> to 38.9 MHz.
> >>
> >> Candidate  Radios:
> >>
> >> SCR-608/628:         BC-683,  BC-684 (Tank Sets)
> >> SCR-609/610:         BC-659  (Jeep Sets)
> >> SCR-619:                 BC-1335
> >> PRC-9
> >>
> >> OK, what did I  miss?
> >>
> >> Frequencies:
> >>
> >> The standard  mil channels were at 100 KHz 
> >> intervals.  29.6 seems to  be
> >> the "official" FM calling freq.
> >> I think we're loing  at 29.1, 29.2, 29.3, 29.4, 
> >> 29.5, and 29.6.  We
> >>  probably should zero in on one or two.
> >>
> >>  Crystals:
> >>
> >> Tank Sets:  FT-241 Channel 291, 292, 293,  294, 
> >> 295, and 296 TX, RX is
> >> not crystal  controlled.
> >>         Divide frequency by 72 for  actual xtal
> >> freq.
> >>
> >> Jeep Sets:  FT-243  (One crystal only for 
> >> TX/RX.)
> >> Channel 291 - 6200  KHz
> >> Channel 292 - 6225 KHz
> >> Channel 293 - 6250  KHz
> >> Channel 294 - 6275 KHz
> >> Channel 295 - 6300  KHz
> >> Channel 296 - 6325 KHz
> >>
> >> So, who's this  crazy?
> >>
> >>  Al
> >>
> >>
> >>
> >>
> >> -- 
> >>  Al Klase - N3FRQ
> >> Jersey City, NJ
> >> http://www.skywaves.ar88.net/
> >>
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