[MRCA] [MMRCG] Clatternet East? Military RTTY

Fri Apr 3 18:05:29 EDT 2020

Hi Ray - that should work with these tones...Eg:  With the PRC-47 running
AFSK, the Window Frequency is 7087 kc.  As a USB radio that is the
suppressed carrier frequency.  The system generates fixed audio tones for
mark = 1575 cps and space = 2425 cps in the audio filter passband.

The RF freqs are as follows.  I think a pure FSK transmitter could be set
up like this, I know it works with the T-195 and GRC-106 RATT systems, they
have been on our nets:
Nominal Channel Frequency 7087 kHz *as indicated on a USB AN/PRC-47*
Mode RTTY, 850 Hz shift, MARK LOW, 5 bit, 45.45 baud
Actual Mark Frequency 7088.575 kHz (channel + 1575 Hz)
Actual Space Frequency

7089.425 kHz (channel + 2425 Hz

On Fri, Apr 3, 2020 at 2:46 PM Ray Fantini <RAFANTINI at salisbury.edu> wrote:

> I was doing 850 Hz shift today with Nick (K4NYW) and know he was using old
> school 28 teleprinter and knowing him some Navy TU, I don’t have a
> mechanical teleprinter now but will get one at some point but I was running
> 850 Hz shift on 7.087 USB feeding the RF-350 ASFK via the patch port.
>
> Using MITTY you can use the AFC function and as long as the shift is
> specified the AFC will modify the tones to what ever frequency you want,
> not like the days of having to have fixed tones. So I am going to listen
> for Net Control, set my Mark frequency to 2125, turn the AFC off and tune
> my radio there. I would assume that will put me right for the other
> stations on the net? If not 2125 Hz for Mark what then?
>
> Not trying to be difficult just curious.
>
>
>
> Ray F/KA3EKH
>
>
>
> ------------------------------
> *From:* Ron Boltz <rl.boltz at mhsdesign.com>
> *Sent:* Friday, April 3, 2020 5:32 PM
> *To:* Ray Fantini <RAFANTINI at salisbury.edu>; mrca at mailman.qth.net <
> mrca at mailman.qth.net>; MMRCG at groups.io <MMRCG at groups.io>;
> milsurplus at mailman.qth.net <milsurplus at mailman.qth.net>
> *Subject:* RE: [MRCA] [MMRCG] Clatternet East? Military RTTY
>
>
> I’m ready but suggest we use 850 shift, mark low, military tones.  Those
> of us with mil gear can operate this way.  I can do others but would need
> to go with the RF-350K and even with mine which has the AFSK board is mil
> spec shift and tones. Or I have the ST8000A which can do anything.
>
>
>
> Ron Boltz
>
>
>
> *From:* mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> *On
> Behalf Of *Ray Fantini
> *Sent:* Friday, April 3, 2020 4:01 PM
> *To:* mrca at mailman.qth.net; MMRCG at groups.io; milsurplus at mailman.qth.net
> *Subject:* Re: [MRCA] [MMRCG] Clatternet East? Military RTTY
>
>
>
> Have modern RAT Rig all ready to go using RF-350 K and PC that I put
> together running XP and a sound Blaster card using MTTY software.
>
> Last year got feed up with UGC-74 and the 850/85 Hz only MD-522 and got
> rid of them. Now I find myself jonesing for a mechanical teleprinter again.
> Years ago I had a UGC-129 or maybe or maybe I can find one of the Mite
> teleprinters? Hell of a time for all the Ham Fest to be canceled.
>
> Just don't have the floor space for something big and impressive like a
> model 28
>
>
>
> Ray F/KA3EKH
>
>
> ------------------------------
>
> *From:* MMRCG at groups.io <MMRCG at groups.io> on behalf of W2HX via groups.io
> <w2hx=w2hx.com at groups.io>
> *Sent:* Friday, April 3, 2020 2:04 PM
> *To:* MMRCG at groups.io <MMRCG at groups.io>
> *Subject:* Re: [MMRCG] Clatternet East? Military RTTY
>
>
>
> Wonderful!
>
>
>
> *From:* MMRCG at groups.io <MMRCG at groups.io> *On Behalf Of *Nick K4NYW
> *Sent:* Friday, April 3, 2020 1:10 PM
> *To:* MMRCG at groups.io
> *Subject:* Re: [MMRCG] Clatternet East? Military RTTY
>
>
>
> Yay!
>
> Ground-breaking RATT QSO between Ray and me just now.
>
>
>
>
>
> On Fri, Apr 3, 2020 at 12:26 PM John W8SDA (ex WD8INC) <
> jcaldwell at rbcos.com> wrote:
>
> Nick,
> On Saturdays, we usually start early around 9:30 so as to hold the
> frequency for the 10AM net so that may not be the place to test RTTY at
> that time.  Since Ray appears to be your clatternet partner in crime, how
> about you guys work to what suits your schedules to prove this out.  From
> there you guys can name a time and frequency and post it to the group.  We
> can also put it on the groups homepage and the website.  This is the
> motivation I need to dust off some of the RTTY gear that keeps following me
> home.
>
> John W8SDA
>
> --
>
> Nick England K4NYW
> www.navy-radio.com
>
> _._,_._,_
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