http://elecraft.85.s1.nabble.com/K3-Audio-routing-question-tp5257517p5266832.html
I'm not speaking opinion and I'm not speaking from theory ... I have
an amateur. That first hand experience has confirmed as absolute
... Joe, W4TV
>
> That's NOT the case. If anyone would actually try turning on the Mix
> feature that Lyle gave them access to via the utility terminal they
> would quickly discover for themselves that it DOES work, and it works
> VERY WELL. Especially when using a Beverage and Vertical antenna
> together. It can lower the noise ratio very effectively. Furthermore
> if you have 2 antennas that are working perpendicular directions on
> the same phase the L-R mixer will help increase the signal strength.
> It does NOT always cancel out signals. It does NOT cause picket
> fencing either, and you do not need to offset your Freq. either.
>
>
> For goodness sake people, try the thing, Stop making all these
> assumptions. Things on paper aren't always what they are when you
> apply them to practical situations. I'm sorry that Joe feels
> differently, and he's welcome to it, but this opinion is coming from
> someone that has not even bothered to try this feature out, because
> his theory on paper tells him otherwise. As someone that has, and IS
> using this feature on the K3 (though the Elecraft utility terminal
> window !EEFF;) I can say with FACT that it DOES work, and it works
> well for SOME, not all, situations. Some times it's easier to just
> try something than letting others tell you something isn't going to
> work.. No matter how smart they are or how convincing their theory is
> (and yes, I am giving Joe credit for being an intelligent person).
>
>
> Finally, I'll only ask that Joe doesn't make any more personal
> attacks on here because my views differ from his. This is a
> discussion with more than one opinion. I have 25 years of experience
> using Radio, doing design work, repairs, and I've been using
> Diversity mode with and without mixing for MANY years, regardless of
> what he thinks.
>
>
>
>
>
>
>
>
>> Date: Wed, 7 Jul 2010 13:10:26 -0400 From:
[hidden email] To:
>>
[hidden email] Subject: Re: [Elecraft] K3 Audio routing
>> question
>>
>> I think it is finally beginning to sink in here. Yes DIVRSTY mode
>> would be one way to lock both receive VFOs together, with the
>> transmit VFO on a separate frequency. (Another way would be to LINK
>> the two VFOs and use RIT.) I can now see why you might want to use
>> DIVRSTY mode even for non-diversity receive.
>>
>> As Joe described, you can use CONFIG:L-MIX-R to mix both receivers
>> into both ears in dual receive, but not in DIVRSTY mode, and you
>> can then use the BALANCE control to adjust the relative strengths
>> of the two receivers. Before doing this in the heat of battle,
>> though, you might want to experiment with it with the receivers
>> LINKed and on the same frequency. Others have already pointed out
>> that there will be "picket-fencing" in the frequency response, and
>> you can actually see this for yourself.
>>
>> With both receivers having matched roofing filters and both tuned
>> to the same frequency and LINKed, using a single antenna, I observe
>> a fairly pronounced "picket-fence" effect in the audio response as
>> I tune past a carrier. In fact, I can hear notches in the band
>> noise as well as in signal strengths as I tune up and down the
>> band. This suggests to me that L-MIX-R would only be useful when
>> the two receive VFOs are tuned to different frequencies. The
>> frequencies must differ by at least a few 10s of Hz - if they are
>> only a few Hz apart, I hear a very annoying, more or less rapid,
>> beat or flutter in the audio. This, of course, only confirms what
>> has already been pointed out (which is a consequence of the basic
>> physics of the situation), but just in case you want or need to see
>> it for yourself, you can easily give it a try...
>>
>> 73, Rich VE3KI
>>
>>
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