[MRCG] Clatternet Schedule for Sunday 8/3/2014 20:30 TONIGHT

Tim timsamm at gmail.com
Mon Aug 4 00:10:38 EDT 2014


hi Tom - Tnx for the report, that must have been us!  good signals and a
little buggy (mostly operator error on my end as I relearn this stuff...)
the prc-47 seems to be doing fine and I can copy Mark with it but something
is "off" a little - I can copy him fine with the R390A and fldigi driving
my sound card (a great system BTW)...I am receiving Mark with the rain
gutter on the front of my house and it works great, transmitting on an
inverted L NVIS style...

Jim up in Eureka was also hearing us but not decoding just yet - he'll get
there...

Anyway, good QSO - hope you can get something going....

73, Tim

73, Tim


On Sun, Aug 3, 2014 at 9:03 PM, Thomas Murphy <tpmurphy at sonic.net> wrote:

> I heard you guys, very strong signals but I have no means to decode.
>
>
>
> Tom, W6TOM
>
> -----Original Message-----
> From: MRCG [mailto:mrcg-bounces at mailman.qth.net] On Behalf Of Mark J.
> Blair
> Sent: Sunday, August 03, 2014 7:27 PM
> To: West Coast Military Radio Collectors Group
> Cc: Jim Falls
> Subject: Re: [MRCG] Clatternet Schedule for Sunday 8/3/2014 20:30 TONIGHT
>
> UPDATE! It was pointed out to me that the frequency I picked is just over
> the digital sub-band edge. So, we'll QSY 50 kHz lower this evening. We can
> discuss a better frequency later if that's not an optimum one for any
> reason.
>
> Updated announcement:
>
> Folks, Tim N6CC and I plan to try another Clatternet tonight at 8:30 PM.
>
> This setup was chosen for best compatibility with the military gear likely
> to be used on Clatternet.
>
> Mode:
> * RTTY, 5 bit Baudot code, 45.45 baud
> * 850 Hz shift
> * Mark low (this is opposite of normal ham band convention)
>
> Actual transmitted frequencies:
> * Mark  3551.575 kHz (+/- QRM in 1 kHz steps)
> * Space 3552.425 kHz
>
> Tune a PRC-47 or GRC-106 as follows:
> * Indicated freq 3550 kHz. USB, of course.
> * Mark tone  1575 Hz
> * Space tone 2425 Hz
> * Centered around 2000 Hz
>
> For a modern SSB rig with a sound card modem, this setup might work better:
> * Indicated freq 3550.5 kHz USB
> * Mark tone  1075 Hz
> * Space tone 1925 Hz
> * Centered around 1500 Hz
>
> A true FSK rig like a GRC-46, GRC-26, etc. would tune to 3551.575 kHz (LOL!
> Just zero-beat one of the SSB-based rigs on the net!).
>
> I'll be using a Yaesu FT-450D tonight, with a SigaLink USB interface and
> running fldigi on my Mac. Getting my vintage RTTY gear running is on my
> long
> list of to-dos!
>
> --
> Mark J. Blair, NF6X <nf6x at nf6x.net>
> http://www.nf6x.net/
>
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