[Elecraft] K3 - AFSK anamoly? No replies, try again

[Mike Murray]

Bob, Joe, Bill & Mike,

Since I'm new to RTTY, I probably didn't describe my question in correct
terminology - I mainly only operate CW.  I'll try again....

I'm using DATA A/AFSK A, setup for low tones (915/170) and the RTTY dual-PB
filter.  To illustrate what I'm hearing/seeing, imagine tuning down from
14.090 until you hear and can decode an RTTY signal.  Then continue tuning
down 915 Hz (to what I probably erroneously referred to as zero beat) and
then down another 915 Hz, I can now hear the same signal but inverted
(slightly weaker, but definitely there).  It is not decodeable, but it is
definitely there.  I assumed (yeah, I know) that the opposite sideband
should be suppresed, but I think that's what I'm hearing.  Any advice will
be appreciated.

Mike - W0AG

On Wed, Jan 6, 2016 at 12:28 PM, Bob McGraw K4TAX <rmcgraw at blomand.net>
wrote:

> Seems strange to me.  Don't or haven't noticed it with my K3S.   I would
> think they perform about the same in this regard.
>
> 73
> Bob, K4TAX
>
>
> On 1/6/2016 10:40 AM, Mike Murray wrote:
>
>> I played a bit in the RTTY RU this weekend with my new-to-me K3 to learn
>> the
>> operation and iron out any kinks in my setup. Everything worked well
>> except
>> for a problem (?) on receive.  I was able to easily tune in signals and
>> copy using MMTTY, but when I tuned to the other side of zero beat I could
>> easily hear the same signal.  Obviously, it was inverted, but I was
>> surprised
>> to even hear it at all.  Is this normal or do I have something setup
>> incorrectly?
>>
>> Mike - W0AG
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