[ICOM] Use a RTTY filter in SSB on IC751a?

[Mel Martin]

It's been a while, but I believe the 751A will use the CW filter in the RTTY
narrow position. It would be lot easier, and preferable, to implement FSK
keying in your 751A for RTTY. For the modern Sound Card DSP modes, there is
no practical way to do it  without modifying the radio. Remember, that radio
pre-dates Sound Cards! However, you can narrow the pass band considerably
and this is usually sufficient except in a contest.

Mel, VE2DC

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I use a soundcard with MTTY to operate RTTY on my IC751a (radio set to 
SSB mode).  In a RTTY contest such as this weekend, the QRM is 
unbearable, and I'd dearly love to use a filter such as the FL-52A to 
kill off the adjacent channels before the AGC squashes the quieter 
signal that I am trying to pull out.

A buddy suggests that I could plug the FL-52A 500 Hz RTTY filter into 
the SSB socket to fake out the radio.  From the manual, I doubt that 
this would work.  Can anybody on this list clarify?  If not, what do you 
suggest to implement a tighter filter for SSB-soundcard RTTY?

Thanks and 73,

Jim
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