[MRCG] Clatternet 12/28/14

[boatanchor at martasystems.com]

Tim -

This Dovetron is a MPC-1000T (Tempest) unit - still has a USCG tag on it. 
Jim knows much more about these than I do - there were many differences in 
the various models, even those with the same model numbers.

I have at least 5 other types of terminal units to try, all audio units. 
Sounds like a TU shoot-out and report is in order.

BTW, I often run polarization diversity with (2) R-390A each on separate 
antennas (vertical & dipole) for the AM net. It's fun to watch what 
happens...

John



-----Original Message----- 
From: Tim
Sent: Monday, December 29, 2014 19:15
To: West Coast Military Radio Collectors Group
Cc: w6jve at arrl.net
Subject: Re: [MRCG] Clatternet 12/28/14

Hi John - I am not familiar with the Dovetron gear.  Was it used by the
military?  The few photo's that I have seen - looks like civvy gear.
Sounds like it works very well in comparison.  That "50 miles" spec is
interesting - presumably for reliable max groundwave range versus selective
fading issues from skywaves....

With your dual terminal setups maybe you could try some space diversity
with a second receiver & antenna?

In addition to the PRC-47/CV-2455 I also run a second setup with an R-390A
driving a sound card/FLDIGI system for backup.  Interesting to watch - I
think the sound card has superior audio filters but sometimes it produces
receive garble when the CV-2455 gets good copy, and vice versa... Probably
due in part to the separate antennas used...

It's all good!

Tim - N6CC
NNNN

On Mon, Dec 29, 2014 at 9:49 AM, <boatanchor at martasystems.com> wrote:

> Tim -
>
> Thanks for running the small net last night.
>
> I was using the GRC-19/46 setup (T-195/R-392 etc), with the CV-278 IF
> discriminator demod driving the Kleinschmidt TT-119 I just resurrected, 
> and
> transmitting with the same machine thru the MD-203 FSK unit.
> Simultaneously, the R-392 audio was driving the Dovetron and M28 ASR.
>
> Results - the Kleinschmidt printed well only with the strongest signals,
> and little or no QRM. Any noise seemed to kill it. The Dovetron/M28 combo
> printed nearly 100% from both you and Jim, even during the worst QRM.
>
> The manual states the reliable range of the GRC-46 as 50 miles, and last
> night provided some evidence to support that.
>
> John WB6AZP
>
>
>
>
> -----Original Message----- From: Tim
> Sent: Monday, December 29, 2014 02:20
> To: West Coast Military Radio Collectors Group
> Cc: w6jve at arrl.net
> Subject: [MRCG] Clatternet 12/28/14
>
>
> Hi guys - had a good but small net tonight.  Just WB6AZP in Santa Paula 
> and
> W6JVE in Fayetteville AR,  The band held up fine, pretty much 100% print
> from both stations here.  John's Kleinschmidt was working well, "sounds"
> great HiHi.
>
> Looks like that concludes MRCG Clatternet Ops for 2014 - a good year to 
> get
> this net back into operation.  Hope more of you-all can get some gear 
> going
> and check in too.
>
> 73 to all and Happy New Year
> Tim, N6CC
> NNNN
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