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RE: [RFI] PME (Was: Earth isolation)

To: "'george.shaw@ukf.net'" <george.shaw@ukf.net>,"RFI@contesting.com" <RFI@contesting.com>
Subject: RE: [RFI] PME (Was: Earth isolation)
From: Ed -K0iL <eedwards@tconl.com>
Reply-to: "eedwards@tconl.com" <eedwards@tconl.com>
Date: Sun, 19 Sep 2004 14:52:24 -0500
List-post: <mailto:rfi@contesting.com>
I've never heard the term "Multiple Protective Earthing" system before; 
maybe it's called something else here in the states or by other vendors? 
 Also unfamiliar with an "electricity supply board timer".  What's the 
"rate" you're refering to?  KiloWatt-Hours?  How could you convert daytime 
rate to nighttime?

As far as AC filtering, not sure what's available in the UK, but I use 
Tripp-Lite Isobar for filtering and AC surge suppression on all ham 
equipment.  Another vendor is Polyphaser.  They make whole house protection 
as well.

 de ed -K0iL

-----Original Message-----
From:   George Shaw
Sent:   Sunday, 19 September, 2004 12:05 PM
To:     RFI@contesting.com
Subject:        [RFI] PME (Was: Earth isolation)

Folks great info, I learnt a lot, though my original question got lost
somewhere in the math :-) thanks to all who contributed to the discussion.

The original question was more to do with interference caused by a nearby 
antenna used by another radio operator (not a ham) getting to my audio
equipment which is connected to my TxRx. My own equipment is near quiet as 
have proven when the neighbour was not operating. I suspect that my mains 
picking up the Tx from next door, I was thinking of a mains filter, what
type, who makes them (240V-50Hz)

Now another question. Any thoughts or comments/data on Protective Multiple
Earthing systems and interference or use near/in radio installations?

Also anyone ever had a electricity supply board timer (used to change for
daytime high rate to evening/night time low rate) cause interference to
radio or telephone circuits by introducing a click, click, click steady
repeated sound?

George Shaw MI3GTO / 2I0GTO

" Any Sufficiently Advanced Technology
is Indistinguishable from Magic"
                          ---Arthur C. Clarke

Mobile: +44 (0) 7740 361 163
Email: george.shaw@ukf.net
Fax & Voicemail: +44 (0) 871 242 5365
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