[Elecraft] Importance of good coaxial jumpers

[Jim Brown]

On 11/11/2013 8:01 AM, Joe W2KJ wrote:
> I replaced the coax jumper cable (RG58) from my KX3 to my coax antenna switch with a new one and the birdies disappeared!!

A high quality shield, well soldered to a high quality connector, is 
critical to good performance.  A high quality shield requires low RF 
resistance, which in turn means a beefy copper braid with a really good 
concentric connection at both ends.  A high quality connector means 
Amphenol 83-1SP.

Real hams don't buy pre-made coax cables, they make their own. Pre-made 
cables are often made with cheap coax with junk connectors.  And that 
includes "big name" vendors who have big ads in QST and CQ.

73, Jim K9YC