Alan, I don't believe you have said what type of antenna you are using. If you are using a true timing antenna (Symmetricom, Trimble Bullet) I would expect little or no direct effect from the power lines, but if you are using a puck or other inexpensive commercial antenna (which have little or no filtering or shielding), you may well be affected directly by the field from the power line on the antenna itself. The Thunderbolt itself should have enough filtering to protect you from a direct effect, the Thunderbolt has been designed to be co-located with other equipment, particularly cell transmitters, so I would expect it to be fairly immune to stray fields.
Didier KO4BB > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Alan Melia > Sent: Sunday, August 10, 2008 4:28 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] GPS shielding by power lines? > > Hi Tom Brilliant I hadnt thought of the fields actually > affecting the operation of the electronics! that is certainly > something that might be interesting to check. I note there > lines have three "phase" feeds but no neutral wire so they > must use ground as the return path to any unbalance > currents.(?) > > Thanks Alan G3NYK > ----- Original Message ----- > From: "Thomas A. Frank" <[EMAIL PROTECTED]> > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Sent: Sunday, August 10, 2008 6:38 AM > Subject: Re: [time-nuts] GPS shielding by power lines? > > > > Alan; > > > > I have no idea if this is a cause of your problem, but in > some work I > > have done, I found that the high field strengths (electrostatic and > > magnetic) found under power lines can adversely effect electronic > > equipment that should otherwise be unaffected by the > presence of power > > lines and their low frequency signals. > there. > ----------snip > > > _______________________________________________ > time-nuts mailing list -- [email protected] To unsubscribe, > go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
