I just stuck a piece of folded-up bubble wrap underneath the Pixel
control box which made it much quieter!
On 1 Feb 2015 13:20, Mike K2MK wrote:
Hi Jim,
My Pixel loop is about 15 feet away from my BigIR vertical. I run 1500 watts
QSK and have not had any problem at all. In fact since the
I just tried it at speeds from about 24 to 35 wpm. As you say, not much
difference in what you hear and a big reduction in relay operations.
0.005 extends the useful speed range downward without changing what you
hear much.
I'll try it in the next pileup and see if I think it matters. I have
Hi Jim,
My Pixel loop is about 15 feet away from my BigIR vertical. I run 1500 watts
QSK and have not had any problem at all. In fact since the recent
improvements to the K3 QSK it's become a pretty pleasant way of operating.
As Vic stated, there is a mechanical relay in the Pixel power box that
Is there a significant benefit to running full QSK at speeds = 30 WPM as
opposed to just running break-in w/ a delay of 0.04? I use the Pixel loop
here on 40 and 30 meters w/ my K3, and doing the latter saves a lot of
relay operations. Although you won't hear the band between keying
elements, you
The Pixel can be connected to your amp key circuit. It turns off the
power and grounds the antenna on transmit. It works fine with the K3 QSK
at 30 wpm (haven't really tried it faster). The relay is a little noisy,
but I wear phones and it doesn't bother me. I am using it about 6m from
my
] On Behalf Of Vic
Rosenthal 4X6GP/K2VCO
Sent: Sunday, February 1, 2015 9:41 AM
To: d...@lightstream.net
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 RX Antenna QSK
I just tried it at speeds from about 24 to 35 wpm. As you say, not much
difference in what you hear and a big reduction
Hi all,
Have a K3/P3/KPA500/KAT500 and have been working 160 meters more the past year
or so than in the previous 49 years. Only need three more states for WAS. Got a
lot of noise here at this QTH, and have limited antenna space. Using an
Inverted L up about 40 feet with a K2AV FCP under it.
The question, particularly on the lower bands is signal to noise
ratio and not absolute receive strength. While connecting a
receive antennas to two radios will involve a 3db loss, that
loss will be to both the signal and the noise. The signal to
noise ratio will be unchanged.
Cheers - Bill,
Hi Gary,
You didn't indicate if you are running split or diversity. Here's a solution
if you are in diversity.
There are times that you would like the RX ANT to be steered to both your
MAIN RX and SUB RX. I do that with a splitter on my RX antenna cable. One
leg goes to the AUX RF BNC socket for
To: elecraft@mailman.qth.net
Sent: Saturday, February 01, 2014 7:03 AM
Subject: Re: [Elecraft] K3 Rx antenna
Hello Brian,
I was hoping there would be a way to do this selectively within the
confines of the K3 and not use something external. I found in the
last 160M contest that there were many
Hi Mike,
What you're suggesting sounds like a good idea. I don't often use
diversity because of the dB loss and the stations I am usually trying
to work are the faintest ones out there. instead, I use the two
receivers linked on the same frequency, that gives me the best
sensitivity and I
Gary,
If you want to hear the same antenna in both ears, connect it
to the RX IN jack and press RX ANT on the Main RX. Yes, you
will see a 3 dB loss due to the splitting on both receivers
but that's unavoidable *anytime* you feed a single antenna to
both receivers.
73,
... Joe, W4TV
On
Hi there Paul,
Mike K2MK mentioned that Joe, W4TV along the same line. I made up
the pieces today and did as was suggested. Indeed this is exactly
what I wanted to do with the K3 the directional Rx antenna, mission
accomplished. Now I can null out offending stations sometimes to the
point
I connect my Rx antenna via the BNC below the SO239 outputs. I have a
sub Receiver and have the Rx on the sub and listen to the vertical
transmitting antenna on the main with my stereo headset.
There are times when I'd like to only hear the Rx antenna and not the
vertical and to this point to
I have all of my receive antennas switchable into the sub RX or the rx input (a
six by two matrix in my case) K9ay makes a box that can do this or you can
build your own. K9ay has a preamp in his box so that there is no loss of level
when both inputs are on the same antenna. The RX ant switch
Hello Brian,
I was hoping there would be a way to do this selectively within the
confines of the K3 and not use something external. I found in the
last 160M contest that there were many DX I could hear on the Rx
antenna as it is steerable while the Inv-L picks up sounds equally
from all
I have a question about the receiver front end protection circuits in the K3 —
specifically, the ones on the RX ANT IN and AUX RF inputs.
When I went to the schematics, here's what I found:
AUX RX feeds the KRX3 Sub Receiver board, where it goes to a gas discharge tube
(SA1) shunted by 470K.
I seem to be getting too much RF in on my Beverage on 160 when I am
transmitting, which appears to be causing the K3 RX antenna switching
relay to chatter along with my dots and dashes. No problem on 80 when
using my beverage even though both the TX and RX antennas are the same
for both
Jim Cary wrote:
I seem to be getting too much RF in on my Beverage on 160 when I am
transmitting, which appears to be causing the K3 RX antenna switching
relay to chatter along with my dots and dashes. No problem on 80 when
using my beverage even though both the TX and RX antennas are
Jim Cary wrote:
I seem to be getting too much RF in on my Beverage on 160 when I am
transmitting, which appears to be causing the K3 RX antenna switching
relay to chatter along with my dots and dashes. No problem on 80 when
using my beverage even though both the TX and RX antennas
Hello All,
Anyone know if the RX antenna input is shorted to ground when the K3 is
put into TX mode ? I have been getting some funny stuff going on when I
use my amp on 80m and beverage antenna.
Thanks
Jerry, KE9I
__
Elecraft
K3 S/N 1732, I have added the mod for the RX ant input.
Thanks
Jerry, KE9I
Gerard Jendraszkiewicz wrote:
Hello All,
Anyone know if the RX antenna input is shorted to ground when the K3 is
put into TX mode ? I have been getting some funny stuff going on when I
use my amp on 80m and
Jerry,
If the funny stuff is hearing a clicking sound, that is the sound of
the COR relay kicking in to protect the receiver.
The only cure is better isolation for your receive antenna from the
transmit antenna.
73,
Don W3FPR
Gerard Jendraszkiewicz wrote:
Hello All,
Anyone know if the RX
W3FPR wrote:
If the funny stuff is hearing a clicking sound, that is the sound of
the COR relay kicking in to protect the receiver.
The only cure is better isolation for your receive antenna from the
transmit antenna.
I use KD9SV's Dxpedition receive antenna switch to achieve the
isolation
I've been working the CW contest tonight on 80m with 1500w output to a half
sloper which is enclosed within an 80m full wave horizontal QSX loop which is up
20 feet, using full QSK with no appreciable unwanted effects. The scope trace
looks the same as using the TX antenna as the RX antenna!
Hi Barry,
Yes it's on receive. It's more than leakage, more like both antennas are
connected during receive.
Ed
- Original Message -
From: Barry N1EU [EMAIL PROTECTED]
To: elecraft@mailman.qth.net
Sent: Friday, February 08, 2008 6:29 AM
Subject: RE: [Elecraft] K3 Rx Antenna
Perhaps Ed will clarify, but my take is that Ed's post is a different issue.
I believe he is saying that while he's in RECEIVE mode with the RX ANT
selected, there's leakage of the receive signal on the transmit antenna
feedline into his receiver - poor isolation in the receive antenna
On Fri 8 Feb 2008 at 01:07:35 EST, Ed Gilliland (W5TM) wrote ..
I'm have poor isolation between the transmit antenna (ANT1) and my Beverage
(RX ANT IN). I have to switch to ANT2 to get rid of the noise from the
transmit antenna. As new as I am to the K3 I may have an option set wrong.
--
Ed,
Looks like there is a lot of protection for the Rx
antenna...
Is there a common mode isolation transformer in that
circuit as well?
73,
Julius
n2wn
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