[MRCG] Poor conditions in Eureka

[Tim]

Hi Mark - well my CV-2455 filters could be mistuned.  I'll try to figure
out how to test the tone freqs to see if there is a detectable problem on
this end.  There's gotta be knobs in there someplace!  On receive, it was
working fine...  But it IS 50 years old.....

I also had the R-390A driving my desktop fldigi as a backup in case my mil
gear was still hosed (it wasn't).  The R-390 was connected to the 80 foot
aluminum gutter up on the roof as the antenna - so I was using Space
Diversity - and it worked well.. Garbles on one receiver was usually OK on
the other and vice versa...

Perish the thought, but fldigi and a sound card is a really powerful tool
for detecting slight issues on TX signals. And the AFC works great too...
Fun!
Tim

On Sun, Sep 7, 2014 at 9:23 PM, Mark J. Blair <nf6x at nf6x.net> wrote:

> Regarding "Somebody running about 40 Hz wider.": I think that was Tim
> N6CC. In my waterfall display in fldigi, I could see that his shift was
> just a tiny bit over 850 Hz; I didn't measure carefully, but 40 Hz looks
> about right. That didn't cause any problems for me copying him, though; his
> signal was nearly 100% clean copy here in Riverside tonight. I suspect that
> your trouble copying him was due to local noise, since he reported copying
> you just fine, and I had no trouble copying him. I think that the slightly
> wider shift might have slightly degraded SNR, depending on how tight the
> receive modem filters are, but probably not enough to be a problem all by
> itself.
>
> I've found that I need to crank my Tx audio well below 100% power to avoid
> reports of audio spurs, which surprised me. I've set it for 50W PEP out of
> my 100W PEP rig, and that seems to make my signal clean. The Tx level pot
> is set really low on my audio interface even with 15dB Tx audio attenuation
> in fldigi, so maybe I need to fiddle with some more settings in my silly
> newfangled radio's menus? Or maybe I just need to get off my butt and get
> FSK working on my T-368C. :)
>
> Once I'm running proper green gear on Clatternet, I might still set up
> fldigi hooked to an auxiliary receiver to serve as a station monitor to let
> me monitor my Tx signal spectrum.
>
> --
> Mark J. Blair, NF6X <nf6x at nf6x.net>
> http://www.nf6x.net/
>
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