[OKDXA] RTTY Elmer?

[Robert Redmon]

Charlie,

Welcome to RTTY contesting! It is very much fun once you get the hang of 
it. It seems you are doing everything you can do with the radio you 
have, but using the attenuator when necessary will certainly help with 
the front end overload. The most troublesome problems are caused by guys 
running afsk who don't have their radio's adjusted properly or who leave 
their compressor on resulting in very broad signals. When that is 
amplified by a big amp, big problems result. The guys on PSK 31 police 
that pretty well, but the RTTY crowd seems oblivious. When you run 
across one of those signals, a few khz off it sounds almost like bad key 
clicks.

73, Bob K5SM



Calhoun, Charlie wrote:
> Happy New Year all!
>
>  
>
> I ran the RTTY Roundup for the first time this year.  It was a lot of
> fun.  It wasn't a stellar effort.  I didn't work the entire period due
> to the kids being sick, so I had to take several breaks to help them.  I
> also got off to a slow start learning N1MM, which I hadn't used before
> but it seemed to be time to put CT behind me and move on to a test
> logger with more functionality, namely a digital interface.  I did
> manage to beat last year's Oklahoma SOLP entry, so I was pleased with
> the first time effort during this test.
>
>  
>
> I have a question, though, that would help me with my operating practice
> for this contest and others in the future.
>
>  
>
> I don't have a big fancy rig, I'm running a Yaesu FT-847.  It has DSP
> and I can adjust the high and low cut separately.  I've learned to do
> that and use it to the best of my ability.  The problem I found I had
> was with strong adjacent signals.  I adjusted the DSP so I had a band
> pass about the width of the RTTY signal.  I also adjusted the band pass
> filter on the rig to one side and worked near the edge of that side and
> that helped greatly with adjacent signals to that side.  But that still
> left the other side open.  The built in BPF in MMTTY also helped some
> but didn't do anything for the adjacent strong signals.  When I had a
> strong signal on the open side of the pass band it would overload the
> front end and I would lose the weak signal in my DSP pass band.  
>
>  
>
> Is there anything else I might try to attenuate signals out of the
> passband so they don't overload the front end?  One thing I didn't try
> was the attenuator.  With some suggestions, I'll try some things during
> NAQP CW this weekend.
>
>  
>
> I also have an older Icom IC-736, but I don't use it much for 2 reasons.
> It doesn't have DSP and I don't currently have it hooked up for Rig
> control, but if suggestions are made to try it in comparison, I can do
> that too.
>
>  
>
> Thanks in advance for any help.
>
>  
>
> 73
>
> Charlie Calhoun, K5TTT 
>
>  
>
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