[MRCA] 10 meter FM freqs.
B Smith
smithab11 at comcast.net
Fri Dec 17 12:59:03 EST 2010
I second the vote, 29.6 has all ready been used at
military meets and hamfests. Every RT-524 that I
have seen that is "properly aligned" will work on
the red flag
frequency but may have slightly reduced output.
Z
--------------------------------------------------
From: "Dennis" <spike.dennis at yahoo.com>
Sent: Friday, December 17, 2010 12:49 PM
To: <mrca at mailman.qth.net>
Subject: [MRCA] 10 meter FM freqs.
> 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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>> <mrca-request at mailman.qth.net>
>> To: mrca at mailman.qth.net
>> 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)
>>
>>
>> ----------------------------------------------------------------------
>>
>> 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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