PSN-L Email List Message
Subject: Re: Ham radio interference
From: =?ISO-8859-1?Q?J=F3n_Fr=EDmann?= jonfr@.........
Date: Sat, 20 Feb 2010 17:17:48 +0000
You need to shield your cables properly. The reason why you are getting
a raido interferience is because of poor shielding around your cables.
On lau, 2010-02-20 at 11:00 -0600, Thomas Dick wrote:
> Anyone got some suggestions; experiencing interference while=20
> transmitting ---
> my ham radio setup; FT101, FT757 and Icon =
> low band filtering, torroids on in power=20
> and grounds -- ground uses 6 ft copper coated rods=20
> ... only about 20 ft from a lake
> antennas; vertical for 2 meters at 60 feet, ground plane for ten meters=20
> at 80 feet, 160 meter, 80-40 inverted V
> my seismic epuipment; two 20 sec Lehmans, AS1 with magnetic induction,=20
> Larry Cochrane Amp, AD converter(in metal cases and grounded outside=20
> again with a separate 6 rod), 4.5 HZ geophones .. with isolation and=20
> battery backup.
> When I transmit on any band. drifting of the base line display occurs=20
> and spikes appear. I used to run 400 watts on 29.6 mHz (a repeater) but=20
> abandoned that after 25 yrs when I couldn't cure this problem. I=20
> recently put up the 80-40 meter antenna and have a 1:1.2 SWR.... still=20
> the interference is there! Any suggestions?
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