[Elecraft] MARS operation problem

[Wayne Burdick]

Jack,

Transmitting between 7.5 and 9 MHz is not permitted because we have to  
enforce a minimum frequency distance from the 8.2 MHz IF (and its  
associated IF rejection trap on the KANT3 or KAT3 module). An excluded  
first IF region is a fundamental limitation of a down-conversion  
design. The TS-480 can transmit in this range because it uses up- 
conversion; we used down-conversion to provide much better receive  
performance and allow for narrow crystal filters.

The only way around it would be to use an external transverter. I can  
give you details if you're interested.

The K3 will work well on all other MARS frequencies within its tuning  
range.

73,
Wayne
N6KR

On Dec 23, 2009, at 1:07 PM, W4GRJ wrote:

>
> Yes you are correct, just got off the phone with Elecraft ...it is  
> due to the
> IF at approx 8.2Mhz.
> This is a big deal to me as a MARS/SHARES operator. Waiting to hear  
> back
> from Elecraft to see if they can move the freq up a bit to xmit in  
> this
> area. Otherwise, I will have to put my TS-480 back on the air...glad I
> caught this before selling the TS-480.