Hi,

You need to shield your cables properly. The reason why you are getting
a raido interferience is because of poor shielding around your cables.

Regards,
J=F3n Fr=EDmann.

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 =
207
>                                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
>=20
> 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.
>=20
>=20
> 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?
> __________________________________________________________
>=20
> Public Seismic Network Mailing List (PSN-L)
>=20
> To leave this list email PSN-L-REQUEST@.............. with=20
> the body of the message (first line only): unsubscribe
> See http://www.seismicnet.com/maillist.html for more information.

__________________________________________________________

Public Seismic Network Mailing List (PSN-L)