Alan, I recommend you look for an HP 58532A. I bought a brand new one on eBay for $50 BIN, sometimes you can do better. This is a good timing-grade antenna, and intended to stay outside for a long time. They have good filtering and the LNA is shielded.
Didier KO4BB > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Alan Melia > Sent: Sunday, August 10, 2008 8:17 AM > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] GPS shielding by power lines? > > Hi Didier, thanks for that idea, yes they were all "pucks" > all Garmin two intended for marine use and one was a old > Garmin GPSIIplus with a mag "puck". I have a Trimble > Palisade that I have not got round to working on yet, but I > understand that there are problems putting this version into > NMEA mode...so will have to be careful. > > Thanks Alan G3NYK > > ----- Original Message ----- > From: "Didier Juges" <[EMAIL PROTECTED]> > To: "'Discussion of precise time and frequency measurement'" > <[email protected]> > Sent: Sunday, August 10, 2008 12:52 PM > Subject: Re: [time-nuts] GPS shielding by power lines? > > > > 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 > > > > _______________________________________________ > 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.
