Hi The HP splitters I have torn into have a few nice features:
1) They have built in RF bandpass filtering on a per output basis. No re-circulating RFI. Better protection for the GPS receiver input. 2) They will pass DC from one port and correctly DC terminate the other ports (no antenna missing lights blinking on and off). 3) They have an RF gain block that compensates for the loss of the splitter. 4) The gain block is padded down at each output. You can butcher it to have gain if you wish on a per port basis. 5) The construction is *massive*. If you drop one, you may break a toe, you are unlikely to damage the splitter. Ground fault currents are not going to be an issue. 6) If you get one of the neat ones with external DC supply - it can feed +12 to an "oddball" antenna. Definitely worth picking up if you don't already have several. Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mike Feher Sent: Monday, September 27, 2010 11:34 AM To: [email protected]; 'Discussion of precise time and frequency measurement' Subject: Re: [time-nuts] [Off-List] antennas & GPS Splitters Brooke - The data can be found on the Symmetricom site. Connectors are N. 73 - Mike Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brooke Clarke Sent: Monday, September 27, 2010 11:29 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] [Off-List] antennas & GPS Splitters Hi Mike: Can you tell me about features of the 58535A? Connector type, DC pass through, photo? Total to zip 95482? Have Fun, Brooke Clarke http://www.PRC68.com Mike Feher wrote: > I still have some of the Symmetricom 58535A GPS splitters/amplifiers. > Details: > > 1 58535A $35 plus $ 4.95 priority flat rate shipping > 2 58535A $65 plus $ 4.95 priority flat rate shipping > 4 58535A $120 plus $10.70 priority flat rate shipping > > These are new in original packing. > > PayPal to my email plus 4% for PP fees, or check for exact amount. PP email > is [email protected] > > Thanks& Regards - Mike > > > Mike B. Feher, N4FS > 89 Arnold Blvd. > Howell, NJ, 07731 > 732-886-5960 > > > > > -----Original Message----- > From: [email protected] [mailto:[email protected]] On > Behalf Of [email protected] > Sent: Monday, September 27, 2010 10:50 AM > To: [email protected] > Subject: Re: [time-nuts] antennas > > Rather than put up two antennas, why not use one, and pick up a > HP/Symmetricom GPS splitter? (Mini-Circuits makes a similar unit). You can > find them on eBay for various prices. The Symmetricom one, the 58535A, > supports 2 GPS receivers. It has a built-in amplifier and filters, so it > provides high isolation between the GPS units. It's powered from the GPS > units, and passes power to the antenna. > > The downsides are that it costs more than a pair of cheap antennas, it's > heavy (heavier than the Thunderbolt!), and uses type N connectors. > > But it's low noise, and you only have one antenna and feedline to worry > about. > > 73 bob k6rtm > ------------------------------ > > Message: 3 > Date: Sun, 26 Sep 2010 15:56:47 -0400 > From: "Heathkid"<[email protected]> > Subject: Re: [time-nuts] DS1620 Variants in the Thunderbolt > To: "Discussion of precise time and frequency measurement" > <[email protected]> > Message-ID:<795f7aa593814ecb9aa24f0b55cad...@d1x25bd10> > Content-Type: text/plain; format=flowed; charset="UTF-8"; > reply-type=original > > Thanks for all the information on the DS1620. > > As it turns out, both of the TBolts (remember I got the from two different > sellers and appear identical) have the Trimble OCXO, v3.00 firmware, but the > > DS1620's are marked as follows: > > DS1620 > 0415E2 > 531AD > > DS1620 > 0239D1 > 690AB > > Interestingly, the first one appears to have been swapped out at some point > (flux residue all over the chip / had to clean it off to read the markings). > > I've already ordered another "D1" to swap out the "E2" but really need to > get them both up and running (still trying to figure out how to mount the > antennas!) and see how much difference there really is. > > 73 Brice KA8MAV > > _______________________________________________ > 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. > > > -- Have Fun, Brooke Clarke http://www.PRC68.com _______________________________________________ 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. _______________________________________________ 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.
