[Elecraft] [KX3] JT65 and JT9 possible TX issues

[Jim Brown]

On Thu,5/7/2015 7:15 PM, Gary Hawkins wrote:
> In an ideal world, I'd pair the KX3 with KXPA100 under low drive but 
> if the KX3 is not the right radio for JT65/JT9 then perhaps it would 
> be better to buy another JT65/JT9 out-the-box ready rig for the home 
> shack and keep the KX3 for portable ops (around 80 SOTA activations so 
> far and counting).

The ONLY shortcoming of the KX3 for JT65/JT9 is heating during the long 
TX cycle, which in practice limits its output to about 3W, and you want 
an aftermarket heat sink. Use that 3W to drive a KXPA100 to about 60W, 
and you've got an excellent radio. You would need to move up to a K3 to 
get better. and 60W is a LOT on JT65 and JT9. More power than that is 
used only on 160M, 6M, and weak signal modes like moonbounce. On HF, 
most JT65/JT9 is in the range of 5-30W.

Temperature stability is only an issue on 6M and above.

73, Jim K9YC