[Elecraft] K2: OK to use a bypass cap on the key?

[Jim Brown]

On 6/6/2014 9:09 AM, w2bvh wrote:
> Three turns on  the keying wire (mini zip cord) through a split bead 
> fixed it, but I'm getting on air comments about key clicks.  I'm going 
> to switch to RG174 on the key and intend to add 1 - 10 nF across the 
> key terminals, if its not harmful to the K2. 

NEVER use any form of parallel wire cable anywhere around RF -- it is 
notorious for RF pickup. Always use twisted pair, or coax with a decent 
copper braid shield. CAT5 is four twisted pairs, each of which has good 
bandwidth and excellent RFI resistance.

73, Jim K9YC