[TowerTalk] BN-86, and Choke Balun

[Jim Brown]

This strongly suggests that Buddy's station lacked proper bonding. That 
coax should, for example, have been bonded to all other coaxes at the 
entry point to his station, from there to a robust system of ground 
rods, all bonded to power, CATV, telco, and all other grounds in his 
home. Every chassis in his station should have been bonded together and 
to that combination of grounds. If that had been done, it seems unlikely 
that a bunch of beads on the power amp output would have solved a 
problem (or that the problem would have even existed).

73, Jim K9YC

  On 4/17/2020 9:37 AM, Jim Thomson wrote:
>   there  is  merit  to  installing an  additional  CM  choke  right  at  the  output of a  linear  amp.   Buddy  had  severe  rfi  on  his  80m  yagi,  dsl  issues,  you  name  it.
> No  amount  of  filtering  on  those  devices  worked.  RF  into  the  audio on  6M  setup. M2  has  no  clue  how  to  design  a balun  for a 80m  yagi...nor a 6M  yagi.
> In  desperation,  buddy  installed 30  inches  worth  of  type 43  beads,  onto  213-u....right  at the  output  of  both  the  HF  amp..and  also  the  6m  monoband  amp.