While you're in the programming mode, how about some preventative medicine.
Prevent one rig from switching to a band that the other rig is on. If
it tries, switch back to the old band.
73 de Brian/K3KO
On 6/1/2014 11:19 AM, Doug Person via Elecraft wrote:
This would be a good place to use an Arduino. If the serial ports of
the K3s are available, it would only take a small bit of code to
achieve this.
Doug -- K0DXV
On 05/31/2014 10:46 PM, Don Wilhelm wrote:
Jeff,
That is a logic question seeking an answer. I don't know of a simple
solution, but it is a matter of selecting a match of the outputs of 2
band data decoders. If any two are the same, assert TX INH to both K3s.
That function could be implemented with a number of NAND gates or XOR
gates at the outputs of the 2 band decoders. The exact
implementation of the logic gates is "left to the student", there are
several possibilities, but it would take a number of external logic
gates to implement.
If you are really into logical devices, you could program a chip to
do that directly from the band data outputs - if all 4 of the outputs
from both K3s are a match, assert TX INH to both transceivers.
I do not know of an existing device that will provide that function,
so the implementation would have to be created 'from scratch'. Yes,
it is possible, it is just a matter of "a few logic gates".
73,
Don W3FPR
On 6/1/2014 12:04 AM, Jeff via Elecraft wrote:
My station consists of two K-3's, each with a dedicated legal limit
amplifier and SteppIr antenna. To minimize interference between
bands I am using Array Solutions Bandpass filters. However, if both
rigs accidentally wind up on the same band I run the risk of
overloading the front end of the opposite rig and damaging the
receiver (which I've done once...). Does anyone have a way of taking
the band data information and disabling transmit capability on both
rigs if they are on the same band? How are others using SO2R
avoiding same band transmission and subsequent receiver damage?
Anyone have any experience with the Array Solutions AS-RXFEP front
end protector?
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