The only time I have experienced some amount of attenuation on receive
is when I was using some other amplifier besides the KPA 500.
I found I had to totally disconnect all my cabling between the amplifier
and the rig. Since I am using the K line completely, trying to use an
external amp other than the KPA 500 can be done without disconnecting
all the cabling, but on receive you will experience attenuation of the
receive signals. To have full receive using another brand of amp, you
will have to remove the data transfer cabling between the rig and amp.
I hope I have 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 <[email protected]>
To: Mike K2MK <[email protected]>
CC: [email protected]
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 display on the P3 was flat, virtually no "visible" signals. No matter
as I was doing my morning reading with my coffee.
Later, I went to the radio and there should have been some good activity
on 20, 17, 15, 12, and 10. I did have signals but no where near as much
as I think there should have been. I thought maybe the KAT500 was out
of tune so I fooled with that, Xmitted tune and so on and no real change.
I checked everything I could think of such as change in PRE setting (I was
on PRE), Attenuation (no, was not), and so on.
Finally, I tried the old computer programming trick, turn it off and turn it
on again.
When the K3 came back up the bands were crowded with signals. So, there
was some significant attenuation going on but turning off (front panel
switch only) the K3 and turning it back on fixed everything.
Ideas, comments?? Oh, this has happened only that one time so far.
73, phil, K7PEH
On Mar 26, 2014, at 4:14 AM, Mike K2MK <[email protected]> wrote:
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 having a problem with T/R switching in my K3. The symptom is that,
after I transmit, the receive signals are sometimes very attenuated.
This problem has gotten worse. At first, simply a quick tap on the PTT
switch fixed everything, but now, at least on phone, I must make a brief
additional transmission to get the receive to return. Today, the
problem got worse, and sometimes I have to really fuss with things to
get receive back. Here are some questions:
1. Is there a T/R relay in the K3, and does this sound like it is
sticking, at least to the extent that it does not make good contact
on receive?
2. Has anyone had the similar problem, and what was the solution?
3. If it is a relay, can it be replaced easily, or is this a return to
Elecraft situation?
4. If it is simply a relay replacement, where is the relay located?
Thank you,
Jan, KX2A
--
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