[Elecraft] K3 to KAT500

[Jim Brown]

On 1/24/2014 3:52 PM, tom armour wrote:
> If I buy a K3/100 without auto tuner and a KAT500 is there any additional cable I need (other than coax) to connect the two together?

Some folks feel the need for an AUX cable to tell the KAT500 what band 
it is on. I don't, because the KAT500 has a very fast frequency counter 
that can figure that out with a short burst of RF.

> or does KAT500 come with all cable beeded to connect it to the K3?

Yes.
>   I see a cable for KAT500 to KPA500 but not to the K3.

Yes. To prevent damage to its relays, the KAT500 must be able to 
interrupt the keying line to any power amp that is used.  It has an RCA 
input, and an RCA output. So ONLY if you're running an amp, you need an 
RCA-RCA between rig and KAT500, and another between KAT500 and power amp 
PTT.

> Is there anything I'll be missing with the KAT500 vs the internal tuner other than portability?

QRP autotune  -- the KAT500 is optimized for high power, and doesn't 
autotune very well below about 10W.

73, Jim K9YC