David,
Double shielded coax would certainly reduce leakage from the coax, and is a
good investment in my opinion. However its use might not have too much
impact on the receiver's birdie problem, because many of the rogue signals
involved are probably flowing on the outside of the coax's braid,
Of Geoffrey
Mackenzie-Kennedy
Sent: 05 March 2009 10:08
To: Elecraft Discussion List
Subject: Re: [Elecraft] K3 birdies - question?
David,
Double shielded coax would certainly reduce leakage from the coax, and is a
good investment in my opinion. However its use might not have too much
impact
So, could we use the good old methods of wrapping the coax around a suitable
toroid. That would mean a longer cable at which point I would invest in a
better quality cable if I were doing it and I'm tempted to do so to get the
best chance of cracking the main issues we are addressing.
David
Hello John,
That could reduce any trash from a router is , but it would not remove any
of the receiver's self inflicted birdies.
73,
Geoff
GM4ESD
John Lemay wrote on Thursday, March 05, 2009 10:28 AM
Hello all
I think it may be useful to tackle this problem from the other direction,
and
It might help, but it might not, because until such time as the source of a
particular birdie is contained or removed, it will remain to be a source of
a birdie. If you block one route, these birds have a habit of finding
another, especially if the layout is open plan.
73,
Geoff
GM4ESD
. But
that's a more complex task to try and raises issues of heat capture.
-- Eric
Original Message
Subject:Re: [Elecraft] K3 birdies - question?
Date: Thu, 5 Mar 2009 17:19:34 -
From: David Cutter d.cut...@ntlworld.com
To: e...@k3na.org
References
James Sarte wrote:
At first I thought I did not have any noticeable birdies, but now it
seems that I have developed a few. It's probably from moving cables
and such around inside the rig.
We could really use a detailed set of photos of cables behind the synth
board(s), showing the
I also wonder if it would be worthwhile buying higher spec coax. Don't know
what is used in the K3, but for the lengths involved it would be worth the
investment to get short cables made in say LMR100 or RG142 etc if it's not
already
David
G3UNA
Ian White GM3SEK gm3...@ifwtech.co.uk
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Grant Youngman
Sent: Wednesday, March 04, 2009 1:08 AM
To: Elecraft Mailing List
Subject: Re: [Elecraft] K3 birdies - question?
What you're hearing aren't birdies. If they go away when you remove
the antenna, then obviously they're signals
James,
Any signal coming in from the antenna will change pitch when you tune the
radio in CW, SSB or DATA mode. That's not how you tell a birdie from a real
signal - it's removing the antenna that distinguishes them. A real signal
will either disappear entirely or at least become much weaker when
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ian White GM3SEK
Sent: Wednesday, March 04, 2009 12:11 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 birdies - question?
James Sarte wrote:
At first I thought I
Rich,
Many thanks for your reply.
From your description, it then sounds as if I'm hearing a real signal. I do
have a theory that there may be some sort of electronic signal getting into
my feedline. My coax isn't routed ideally, as a good portion of it runs
between two entertainment centers
Ron D'Eau Claire wrote:
I've had the cables all over the place. There seems to be only one
cable whose placement has a significant effect on birdies. That's the
long (10/25cm)cable running from J84 at the bottom of the Auxiliary
KSYN3 board to J85 on the KRX3 RF module. It should be dressed as
Subject: Re: [Elecraft] K3 birdies - question?
Rich,
Many thanks for your reply.
From your description, it then sounds as if I'm hearing a real signal. I
do
have a theory that there may be some sort of electronic signal getting
into
my feedline. My coax isn't routed ideally, as a good portion
] On Behalf Of Ian White GM3SEK
Sent: Wednesday, March 04, 2009 12:11 AM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 birdies - question?
James Sarte wrote:
At first I thought I did not have any noticeable birdies, but now it
seems that I have developed a few. It's probably from
: Wed, 4 Mar 2009 12:53:23
To: Ron D'Eau Clairer...@cobi.biz
Cc: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 birdies - question?
That particular TMP cable I have running underneath the KRX3 board, and over
the filters.
73,
James KC2UEE
On Wed, Mar 4, 2009 at 11:01 AM, Ron D'Eau Claire r
Aha! I think you're on to something here Bill.
My RG-8 actually snakes its away around one of my entertainment centers
where I happen to have a cable modem, network switch, and seperate wireless
router all in the same spot. I have a PS3, Xbox360, and an Onkyo TX-NR905
receiver all wired by
I find a portable (i.e. battery powered) short wave receiver very
useful for tracking down local sources of EMI. When I hear EMI that
goes away when I remove the antenna on my K3, I get out my SWL
receiver and tune it to the same frequency so I can hear the EMI on
it. With the
[mailto:jp...@jeffnet.org]
Sent: Wednesday, March 04, 2009 2:01 PM
To: KC2UEE
Cc: Elecraft list
Subject: Re: [Elecraft] K3 birdies - question?
I find a portable (i.e. battery powered) short wave receiver very
useful for tracking down local sources of EMI. When I hear EMI that
goes away when I
James Sarte wrote:
Hi Joe and gang,
I found the source of my birdie... ended up being a Linksys 54g wireless
router running a custom Linux kernel. The second I unplugged it from the
mains, all noise dissipated on the K3. Amazing really that it was so easy
to find! Special thanks to Bill
...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of James Sarte
Sent: Wednesday, March 04, 2009 4:58 PM
To: 'Joe Planisky'; 'KC2UEE'
Cc: 'Elecraft list'
Subject: Re: [Elecraft] K3 birdies - question?
Hi Joe and gang,
I found the source of my birdie... ended up being a Linksys 54g wireless
@mailman.qth.net
Subject: Re: [Elecraft] K3 birdies - question?
James Sarte wrote:
At first I thought I did not have any noticeable birdies, but now it
seems that I have developed a few. It's probably from moving cables
and such around inside the rig.
We could really use a detailed set
Dear group,
At first I thought I did not have any noticeable birdies, but now it seems
that I have developed a few. It's probably from moving cables and such
around inside the rig.
When I tune quickly through a band, I can hear solid tones that change in
pitch as I move up or down in
What you're hearing aren't birdies. If they go away when you remove
the antenna, then obviously they're signals being picked up by the
antenna from some source outside the radio. Do you her them on
another receiver connected to the same antenna?
Grant/NQ5T
On Mar 3, 2009, at 11:22 PM,
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