[Elecraft] KX3-2M module will work well for CW and SSB, even as an I.F. for higher-band XVTRs

Jim Brown jim at audiosystemsgroup.com
Tue Apr 8 19:48:53 EDT 2014


On 4/8/2014 4:23 PM, Dave wrote:
> The multiplication occurs as the chain of frequencies up to where you 
> want to get to multiplies and I really do not expect to have to argue 
> this with RF engineers

Dave,

Are you using (or expect to use) a TRANSVERTER for the UHF bands? That 
is, indeed, pretty much the standard way nowadays. In a transverter, the 
transceiver input and output are MIXED, not multiplied. So the total 
frequency drift is the SUM of the drift of the transceiver (in this 
case, the KX3 with 2M transverter) and the drift of the UHF transverter.

Drift of the KX3 with 2M transverter would be multiplied ONLY if you 
were to use a system that multiplied the TX output to feed the 1.2 GHz 
transmitter. That's feasible, I guess -- 1296 is the 9th harmonic of 144 
MHz --  but the 2M rig would need to TX below 144 MHz to cover all of 
the band, and the RX would still be MIXED.

73, Jim K9YC


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