This is a follow-up to the discussion about a T/R switching problem I
had. I thank everyone who shared their suggestions. Those who said to
look elsewhere besides the K3 were probably correct. I swapped some of
my interconnecting coax jumpers, and the problem appears to have gone
away. I
Hi Jan,
What is your antenna. There has been an ongoing thread on the SteppIR site
regarding this identical problem with many types of transceivers, not just
the K3. If you have a SteppIR antenna (any model) you should take a look at
their Yahoo site.
73,
Mike K2MK
Jan Ditzian wrote
I am
I have a similar (close but not identical to symptoms below) problem with
K3 receive attenuation. I do not have a SteppIR and this same problem occurred
on more than one antenna (80-meter dipole, Traffie Hex Beam).
My symptoms were that when I turned on the radio in the morning, the band
per the
The T/R problem has occurred with different antennas. However, there
are several interconnecting coax cables in the line, and these do not
change. All are soldered, but they are quite old, and
home-constructed. I suspect that if it is a cable problem, it is in the
shack. I will pursue this
] T/R switching problem
The T/R problem has occurred with different antennas. However, there are
several interconnecting coax cables in the line, and these do not change.
All are soldered, but they are quite old, and home-constructed. I suspect
that if it is a cable problem, it is in the shack
this right, as it has been some time since I experimented with using an amp
with more output than the KPA 500.
Toby K4NH
Original Message
Subject: Re: [Elecraft] T/R switching problem
Date: Wed, 26 Mar 2014 06:53:18 -0700
From: Phil Hystad phys
I have encountered this phenomenon on a number of occasions over the
past 50 years. In my case, every time, the problem was an oxidized
connection or relay contact. Transmitting a single dit would clear the
problem (temporarily), but the condition would always reappear after a
time, sometimes
I have this problem occasionally on my sloping Vee for 40, 80, and 160,
and I know it is in the antenna. The V is fed at the top of the tower
with 450 ohm ladder line which connects to the antenna wires with copper
split nuts. Corrosion has slowly occurred, and over time, the band gets
very
Jan,
Before deciding it is a K3 problem, take a look at your antenna system
coax. If you bought cables from DX Engineering in the past year, be
aware that they had a crimping problem that could result in the bhavior
that you are experiencing. A transmit 'sets it straight', but the RX
As Don suggests, the problem can be anywhere in the antenna system, and
in my experience it is much more likely to be a connector than the K3.
I once had a similar problem that drove me nuts until I discovered a
corroded solder joint INSIDE an encapsulated balun.
A film of oxide on a poor
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