[RTTY] Improving receiving performance

[Jerry Pixton]

Don, et al

Is the "multi-path" profile what you are calling "ground wave" profile? Or 
is there another profile that could be entered and saved. I always have to 
pick my times to work Mike, K4GMH, about 80 miles away.

This past wpx I was also cranking the RF Gain way down on the 756 Pro II 
and experimenting with an external sound card (which my impression, without 
a side by side comparison, is it did not work as well as my Santa Cruz).

On the Icom 756 Pro II, I always use the RTTY Filter turned on - it has 
much better skirts that the regular rtty mode  filters. I have the 
bandwidth set to 250 hz. But, unlike most of you I would guess, I have 
turned the Twin Peak filtering off because there was just too much audio 
hiss in my radio. On the rare occasion, I really want a Twin Peak filter, 
my external audio DSP  MFJ-784B is sitting on a Twin Peak position so I 
only have to push one button.

However in playing with the Attn control, I have discovered what may be a 
failure on my radio. The 6 dB position drops the signal appropriately but 
the 12 dB and 18 dB positions put the signal down in the grass level. I 
don't recall this ever happening in the past what I was making transmitter 
isolation measurement, etc.

Jerry

At 06:15 PM 2/16/2007 -0600, Don Hill AA5AU wrote:
>#1 - I usually adjust my RF gain to show between +5 to +20 and sometimes 
>higher on 80 meters when signals are strong.
>
>#2 - I use the default settings in MMTTY (Standard profile) most of the 
>time and occasionally use the flutter profile on fluttery
>signals.  With KK5OQ, I sometimes have to use the ground wave profile.

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Dr. Jerry R. Pixton, PIXOS Designs LLC
http://www.pixos.com/designs/RadioTuner/
jpixton at shentel.net
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