[TowerTalk] RF in my laptop

[Jim Thomson]

Date: Sat, 1 Jun 2013 11:26:29 -0700 (PDT)
From: Bryan Swadener <bswadener at yahoo.com>
To: towertalk at contesting.com
Cc: electric911inc at hotmail.com
Subject: Re: [TowerTalk] RF in my laptop


John,
?
Is the shield of your feedline bonded to ground at the point of entry into your house,?as NEC and NFPA require? And, is that ground rod also bonded to your electrical service entrance ground rod as NEC requires?
?
Magically, almost ALL my issues with RFI disappeared when I complied as above. I run several antennas at varying distances from my shack (including a half wavelength 20m vertical on the roof, and a 40m dipole that runs directly above my shack.? And, I run as much as 1KW output.
?
vy 73,
Bryan WA7PRC

Date: Sat, 1 Jun 2013 10:28:25 -0400
From: John NY6DX
Subject: [TowerTalk] RF in my laptop

My antenna is a 5btv on the roof of my garage with radials for all bands some 60 feet from my basement shack. i am using LMR 400 cable and have ferrite on all cords yet on 40 and 80 I get rf so bad I can not use my mouse or hold a wireless internet connection. HELP !!!! John NY6DX

John J. Nistico

##  a  buddy of mine had Distorted audio on 6m.... and of course the M2  6m balun is pure junk.   The temp fix was to used a ton of ferrite beads slid over the coax.... right at the output of the 6m amp.   Problem solved. 
On 80m, another buddy had severe RFI,  TVI, blew out the dsl modems...and the modems already had a ton of ferrite on em.   Again the balun used on the M2 80m yagi is junk... just some scramble wound coax in a box at the
feedpoint.   The temp fix was again to slide a mess of beads over coax... right at the output of the HF amp...again, problem solved. 

##  Last week, another buddy phones me.... again, with severe TVI on his satellite RX set up.  seven foot of beads slid over the coax, on the output of the coax, right at the output of the HF amp. Problem gone ! 
In each case, the braid of the coax was grounded really good to a SPG at the shack...and also at the base of the tower.   The m2 baluns are really bad news.  The 6m balun was replaced with a real one, made from type 
43 beads slid over 393 teflon coax. 

Jim  VE7RF