PSN-L Email List Message

Subject: Re: Ham radio interference
From: AHrubetz@.......
Date: Sat, 20 Feb 2010 12:18:28 EST


I don't know what your soil type is, but at my lake  house I have a 
horizontal loop among the pine trees.   The soil is  sandy, so a ground stake would 
offer too much resistance.   I ran a ground wire from the feed line balun 
at the base of a pine tree out  about 40 feet to the lake.  Then, I tied a 
brick around the end of the  ground wire and threw it into the lake.  Couldn't 
ask for a better ground  than that.  You might try that to extend your 
grounds, and see what  happens,  since you're only 20' away from the lake.
Al
 
 
In a message dated 2/20/2010 11:00:10 A.M. Central Standard Time,  
dickthomas01@............. writes:

Anyone  got some suggestions; experiencing interference while 
transmitting  ---
my ham radio setup; FT101, FT757 and  Icon 207
low band filtering, torroids  on in power 
and grounds -- ground uses 6 ft copper coated rods  
....                     only about 20 ft from a lake
antennas; vertical  for 2 meters at 60 feet, ground plane for ten meters 
at 80 feet, 160  meter, 80-40 inverted V

my seismic epuipment; two 20 sec Lehmans, AS1  with magnetic induction, 
Larry Cochrane Amp, AD converter(in metal cases  and grounded outside 
again with a separate 6 rod), 4.5 HZ geophones ..  with isolation and 
battery backup.


When I transmit on any band.  drifting of the base line display occurs 
and spikes appear. I used to run  400 watts on 29.6 mHz (a repeater) but 
abandoned that after 25 yrs when I  couldn't cure this problem. I 
recently put up the 80-40 meter antenna and  have a 1:1.2 SWR.... still 
the interference is there! Any  suggestions?
__________________________________________________________

Public  Seismic Network Mailing List (PSN-L)

To leave this list email  PSN-L-REQUEST@.............. with 
the body of the message (first line  only): unsubscribe
See http://www.seismicnet.com/maillist.html for more  information.






I don't know what your soil type is, but at my= lake=20 house I have a horizontal loop among the pine trees.   The soil= is=20 sandy, so a ground stake would offer too much resistance. = =20 I ran a ground wire from the feed line balun at the base of a pine tr= ee out=20 about 40 feet to the lake.  Then, I tied a brick around the end of th= e=20 ground wire and threw it into the lake.  Couldn't ask for a better gr= ound=20 than that.  You might try that to extend your grounds, and see what= =20 happens,  since you're only 20' away from the lake.
Al
 
In a message dated 2/20/2010 11:00:10 A.M. Central Standard Time,=20 dickthomas01@............. writes:
Anyone=20 got some suggestions; experiencing interference while
transmitting= =20 ---
                  &n= bsp;=20            my ham radio setup; FT101, FT75= 7 and=20 Icon 207
                &nbs= p;=20              low band filtering, torr= oids=20 on in power
and grounds -- ground uses 6 ft copper coated rods=20
...                  &n= bsp;=20         only about 20 ft from a lake
antennas; ve= rtical=20 for 2 meters at 60 feet, ground plane for ten meters
at 80 feet, 160= =20 meter, 80-40 inverted V

my seismic epuipment; two 20 sec Lehmans,= AS1=20 with magnetic induction,
Larry Cochrane Amp, AD converter(in metal= cases=20 and grounded outside
again with a separate 6 rod), 4.5 HZ geophones= ..=20 with isolation and
battery backup.


When I transmit on any= band.=20 drifting of the base line display occurs
and spikes appear. I used= to run=20 400 watts on 29.6 mHz (a repeater) but
abandoned that after 25 yrs= when I=20 couldn't cure this problem. I
recently put up the 80-40 meter antenn= a and=20 have a 1:1.2 SWR.... still
the interference is there! Any=20 suggestions?
________________________________________________________= __

Public=20 Seismic Network Mailing List (PSN-L)

To leave this list email=20 PSN-L-REQUEST@.............. with
the body of the message (first lin= e=20 only): unsubscribe
See http://www.seismicnet.com/maillist.html for mo= re=20 information.

[ Top ] [ Back ] [ Home Page ]