I have a 50 kW BC station a few miles away. I had to make a HP filter
because of the IMD. But it was not strong enough to force the attenuator on!
73,
Vic, 4X6GP/K2VCO
Rehovot, Israel
http://www.qsl.net/k2vco/
On 15 Nov 2015 22:22, Don Wilhelm wrote:
Sounds like you may have a strong AM
On 11/15/2015 2:06 PM, Dennis wrote:
I have a situation where a K3 with the attenuator off, when
bandswitched to 160M, turns the attenuator on.
The K3 remembers preamp and attenuator status by band. If you want the
attenuator off on 160, turn it off before leaving the band.
73,
... Joe,
Joe
Yes, I can turn the attenuator off once I'm on 160M, but within 2
seconds of turning it off
it will turn itself back on.
Dennis W1UE
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Help:
Dennis,
The attenuator (and preamp too) setting is per band.
If you have the attenuator on for 160 meters, then leave that band, it
will still be set on when you return to 160 meters.
While switched to 160, turn the attenuator off - change to another band
and then go back to 160m - the
Don
I know that the preamp and attenuator settings are remembered per band.
However, if I am on 160M and turn the attenuator off, it turns itself
back on
within 2 seconds. If I am on 80M and I turn the preamp on, it will
turn itself off within a couple of seconds.
I'm trying to find an
Sounds like you may have a strong AM broadcast signal that is
overwhelming the K3 input.
MW signals will be attenuated by the Low Pass Filter, but those signals
below 160m will not be.
The K3 does have some suppression of AM Broadcast band frequencies, but
it may not be sufficient in your case.
What else do you have connected to the K3, specifically the serial port.
Overly strong signals will general kick in a relay to protect the front end of
the receiver and not
enable the attenuator. Is it possible that something else is enabling the
attenuator, like maybe a command
from a computer
Try it on a dummy load. If it changes then it is a radio problem. If it
doesn't then it's external.
If you have used the radio with CAT control, sometimes the software
application will not close and exit correctly and will leave "crud" or
fragmented data in the radio and there's no telling
I have a situation where a K3 with the attenuator off, when bandswitched
to 160M, turns the
attenuator on. I know this is the correct behavior for the K3 if the Rx
signal level is in the range
of +13 to +20dBm. That signal level, by the way, is on the order of
S9+90dB! And, yes, you
would be
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