Ted,
The new synthesizers give the K3/K3S a vast improvement in transmit
phase noise, as well as improving the receive noise floor performance by
several dB.
Both synthesizers must be the same.
I would highly recommend getting another KSYN3A board to use in your
main receiver to match the one supplied with your KX3A.
If you anticipate using Diversity mode, it is a necessity.
If the filters in your KRX3 do not match the ones in your main RF board,
then the new synthesizers are a MUST - the new synthesizers can work in
diversity mode with unmatched filters, but the old ones cannot.
73,
Don W3FPR
On 12/16/2019 10:48 AM, Ted Edwards W3TB wrote:
I put it off for years getting the Sub-Receiver for my K3.
With the change to K4, I got a sub-receiver before they become unavailable.
The sub-receiver comes with the KSYN3A synthesizer board --- so it occurs
to me to change that board into the primary receiver and use the older one
with the sub-receiver. That may make it easier to change out later.
I am really so impressed with the K3 receiver after about 6 years that the
new synthesizer always seemed pointless -- but now I have one anyway.
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