[MRCG] Poor conditions in Eureka

[Alexander Seddio]

Too late to chat?

Sent from my iPhone

> On Sep 7, 2014, at 9:33 PM, Tim <timsamm at gmail.com> wrote:
> 
> 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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