N1MM+ & K3/K3s & Diversity

[Gary Smith-2]

I worked the ARRL 160 this last weekend,
ran QRP. I had a couple technical problems
that came up, one relates to the K3s. I'm
asking here first if someone has  
experienced this.

I prefer running the K3s in Diversity in
the contests. I find it is more helpful to
take the -3 dB loss (or whatever it is)
when using diversity than to hear louder
when only using the one Rx. Diversity
helps in the tough times to allow me to
hear almost undecipherable details when
the band condition collapses.

During the contest the K3s would slip out
of diversity and leave the Rx at a
previous point and I would also hear the
VFO A frequency. It got confusing when
this happened and no, I didn't bump the
diversity button accidentally. I was using
the Marker A & encoder on the P3 to
navigate me through the signals, not the
VFO A knob.

I never saw it happening, it would be a
discovery when I would hearing a call I'd
worked earlier while onto a new station to
listen to and I'd see the diversity light
was not flashing but the sub RX was still
engaged. I never looked to see if it was
the last station I worked or back farther.

The one possible time I might have noticed
something happening was when I heard the
the effect of listening to the VFO B knob
turning on the crowded band while
listening to a fixed signal on VFO A. I
noticed the effect, looked at the K3s and
sure enough the diversity had somehow
unlocked. (What I have no idea of is if
that sound was someone QSYing or my radio
QSYing) This happened 5-6 times in the
contest. It never has happened before that
I remember.

Also using Win4K3Suite (good program) &
K1EL's USB winkey at the same time with
N1MM.

Any idea what might be happening and how
to prevent it from doing this again?

Thanks & 73,

Gary
KA1J
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]

[alorona]

That is purely an N1MM problem, Gary. The same thing happened to me a few times. It was annoying. I bet I could tell you exactly what button pushes caused it to do that, but I'd have to go think about it some.

By the way, the 3 dB loss at that frequency that you incur from the diversity receive setup is totally inconsequential. You do not give up any sensitivity whatsoever. In fact, it's probably desirable to have the ATT on all the time on 160 anyway, in addition to any splitter loss. See a previous post I made concerning this very question: http://elecraft.365791.n2.nabble.com/When-do-I-need-atten-or-preamp-td7616174.html#a7616249 

R,

Al W6LX



________________________________
From: Gary Smith <[hidden email]>
To: [hidden email]
Sent: Sunday, December 3, 2017 9:10 PM
Subject: [Elecraft] N1MM+ & K3/K3s & Diversity



I worked the ARRL 160 this last weekend,

ran QRP. I had a couple technical problems

that came up, one relates to the K3s. I'm

asking here first if someone has  

experienced this.


I prefer running the K3s in Diversity in

the contests. I find it is more helpful to

take the -3 dB loss (or whatever it is)

when using diversity than to hear louder

when only using the one Rx. Diversity

helps in the tough times to allow me to

hear almost undecipherable details when

the band condition collapses.


During the contest the K3s would slip out

of diversity and leave the Rx at a

previous point and I would also hear the

VFO A frequency. It got confusing when

this happened and no, I didn't bump the

diversity button accidentally. I was using

the Marker A & encoder on the P3 to

navigate me through the signals, not the

VFO A knob.


I never saw it happening, it would be a

discovery when I would hearing a call I'd

worked earlier while onto a new station to

listen to and I'd see the diversity light

was not flashing but the sub RX was still

engaged. I never looked to see if it was

the last station I worked or back farther.


The one possible time I might have noticed

something happening was when I heard the

the effect of listening to the VFO B knob

turning on the crowded band while

listening to a fixed signal on VFO A. I

noticed the effect, looked at the K3s and

sure enough the diversity had somehow

unlocked. (What I have no idea of is if

that sound was someone QSYing or my radio

QSYing) This happened 5-6 times in the

contest. It never has happened before that

I remember.


Also using Win4K3Suite (good program) &

K1EL's USB winkey at the same time with

N1MM.


Any idea what might be happening and how

to prevent it from doing this again?


Thanks & 73,


Gary

KA1J

______________________________________________________________

Elecraft mailing list

Home: http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/mmfaq.htm

Post: mailto:[hidden email]


This list hosted by: http://www.qsl.net

Please help support this email list: http://www.qsl.net/donate.html

Message delivered to [hidden email]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [hidden email]