Without diversity I couldn't do my 144 and 432 MHz moonbouncing the way
I do. It's perfect for Xpol's since I can decode both H and Vpol and the
very same time. Thats a huge advantage against other rigs. Love it, a
great feature.
73 Udo, DK5YA
http.//www.dx7eme.de/
Am 29.10.2017 um 14:24 schrieb Victor Rosenthal 4X6GP:
Almost the only time I don't use diversity is when I need the
subreceiver for split pileup operations (and often it's enough just to
watch the P3, so even then I use it). It can make a huge difference.
My antennas are only about 15m apart, but one is a dipole and the other
a (vertically polarized) Pixel Loop.
The loop has a relay that disconnects it when I transmit so there's no
danger to the subreceiver.
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 29 Oct 2017 02:11, lmarion wrote:
I have been trying along time to get buyers to go for it and get the
sub rx for its many pluses. One that is kind of not obvious is the
diversity receive. I knew about it from my years of working on FAA
radars, and military search RADARs maintained by the FAA. All search
radars from way back have diversity RX, because it will find those
small target weak reflections. And some specialized diversity receive
is being developed for those dog gone drones. I have not measured the
sensitivity of the K3s, but there are weak stations that are not heard
when not in diversity. A friend in the city of Spokane can adjust the
phase between his antennas and null out some strong RFI completely!
Leroy AB7CE
-----Original Message----- From: Bill Johnson
Sent: Thursday, October 26, 2017 7:56 PM
To: [email protected] ; [email protected]
Subject: Re: [Elecraft] In praise of the sub Rx & Diversity
I use diversity on 20 meters with a vertical SteppIr and a loop. Both
are separated about 150'. What a difference. Amazing. Makes a huge
difference with stations fading in and out and near the noise level.
I can work them with the Loop, but the vertical is so helpful when
receiving.
73,
Bill
K9YEQ
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Gary Smith
Sent: Tuesday, October 24, 2017 10:38 PM
To: [email protected]
Subject: [Elecraft] In praise of the sub Rx & Diversity
When I bought the k3 in 09 I went all out and bought most of the
accessories to go with it. One of these was the sub Rx and a full
matching set of crystals for it. As upgrades happened I did them all
and wasn't using the Sub Rx in diversity so much but, the advantage of
the Sub Rx was always there with flexibility I take for granted.
So I upgrade to the K3s and migrated the sub Rx to it as well. I just
don't think of diversity much but that was one of the reasons I bought
the Sub Rx in the first place. With the 3 dB loss going to Diversity,
I just listened more with the main receiver and let it go from there.
So today I'm working a ve7 on 10M and the band is going out. I can
hear him but it's at that marginal iffy point, I was missing
characters in his CW. I have a HI-Z triangular & a circle 8 pair of Rx
antennas. The Circle 8 rocks on the low bands, has a filter to cut out
above 40M but the triangular has no such filter and I often hear
better on it than on the the roof mounted tribander. So for fun, I
used diversity and the triangular on the sub,
160 sloper for the Tx antenna & Voilà, I heard him so much better,
finished the Q and that reminded me of the real advantage of diversity
and why it is an asset.
So now it's tonight, I see 3C0L is still on the air at around 3AM
their time, on 20M. They're heading home today and the low band
antenna is packed up already.
What troupers to still be in the game at this point. But I digress...
So here they are, I don't have a good antenna for 20M, have to use the
160M antenna or tribander.
RFI from the neighbors makes the tribander useless so I hear them on
the sloper and can hear them on the Hi-Z Triangular a bit better but
much QSB so remembering the success with the VE7 earlier I go
Diversity & all of a sudden, solid Q5 copy, no QSB and I snagged them
on 20 CW.
Diversity really made the difference. I bought the K3s because it had
such excellent specs, nothing else to me came close, save for 1-2
radios that in 09 were hot and cost more than a new car. And they
weren't any better in practicality than the K3 was. I bought the Sub
Rx for the diversity and now today, while the K3s is itself stellar in
all the right ways, it is an a better product with the Sub Rx.
I'm really honored to have such an
incredibly capable radio.
Just sayin'
73,
Gary
KA1J
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