[Elecraft] Balun Ground Connection

[zendoc at netspace.net.au]

Hi Jim & group

I did an experiment today and tied the balun case/coax shield to station ground via the stud. 

I found 2 things: 

# 1 the manual tuner settings required for 1:1 match changed on all bands, but the KAT3 and manual tuner were still able to find a 1:1.0 match on all bands 80m - 10m. 

#2 where I had no detectable common mode current on the coax shield prior to connecting the balun to ground, I now have 15-20mA on 20 and 40m, as measured with my calibrated clip on ammeter.  There's also now some RF on my tx audio, where before it was clean. 

I'm wondering if the coax shield between the balun and tuner IS functioning as part of this loop antenna system and grounding its shield before the tuner  is introducing more imbalance?  

I'm no expert, but this is interesting. 

73,
John
VK7JB



-------- Original Message ----------

 

 John, 
 I found that by connecting the balun ground to my station ground I
had >25 SWR on all bands. I just let it float......no problems so far.

 73 
Jim, W0EM 
 >>>  
John
VK7JB