[TenTec] ground and rf probs.

[Rob Atkinson, K5UJ]

first, a big welcome back to jerry K0CQ whose posts i have not seen in a 
long time and were missed.

misc. comments on ground and rf probs.:

don't use braid--use solid copper strap.  i used to think braid was okay & 
maybe it is for a few inches but anything long; and for heaven's sake 
anything outside don't use it.  it will corrode and quit being effective.

to the voiceover guy:  FB using ur audio chain into ur Peg--it is low Z 
unbalanced.  you don't need an xformer except for isolation--try using a 
w2ihy Ibox for that.  IHY can wire up a cable from the ibox to the peg mic 
jack and you'll have the transformation from bal. to unbal.
Before you get into outboard audio proc. it is essential that you have 
another rx to monitor yourself on.  with that you can listen to ur sig into 
a dummy load and into ur antenna and see if there  is any difference.  ditto 
with a hand mic into the peg jack v. using the external gear.  if there is 
any distortion, you probably have rf induced distortion getting back into 
your rig or audio chain depending on what you observe.


to the jupiter lockup guy:   I have actually had better results by  
_disconnecting_ the ground straps from my rigs.   Ground your tuner and amp 
if you have one, and try letting the rig float.  Put ferrite chokes on the 
cables hooked up to the jupiter including the coax feedline.   you should 
have your shack ground point right at your tuner, and anything else that's 
grounded should come off of that point.   Radioworks has a pretty good 
little pamphlet on line that discusses dealing with rf problems in the 
shack.   of course it also promotes his merchandise but there is some good 
information in there all the same.   http://www.radioworks.com/nbgnd.html

rob / k5uj

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