The Trimble Thunderbolt is locked to the GPS system, which derives it's reference from Cesium standards initially, but I believe now they have Rubidium standards that are locked to a master reference.
Someone who knows more about the GPS system can chime in on this. In any case, the T-Bolt 10 MHz reference output is about the best you can get unless you want to spring for an HP Cesium standard or maybe a Hydrogen Maser ?? I have two active ones plus one I built using the N1JEZ design. I have a third one boxed up with a power supply and distribution amp that I can loan out to friends. 73, Dick, W1KSZ -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of HankP Sent: Wednesday, March 09, 2016 8:50 PM To: [email protected] Subject: Re: [Elecraft] 10 MHz external reference As a casual observer of this thread - does the oscillator have to be precisely 10 mhz to a zillion decimal places OR does it just need to be close to 10 mhz and verrrrrryyyyy stable ? Years ago hams used to build 10 mhz xtal oscillators/buffers - put them in a thermos bottle - dig a post hole and bury the thing about 4 feet deep - it was pretty stable just xtal aging and needed lo noise stable DC. Hank K7HP ----- Original Message ----- Am 09.03.2016 um 18:37 schrieb Gary Smith: >> What external 10-MHz reference signal source might I find get that is >> not terribly expensive that will do the proper job and allow me to >> get this working? You can look for a GPS disciplined oscillator (GPSDO), an FE-5680 Rubidium based oscillator, or look for some of the lesser expensive GPS receiver modules that have 10MHz outputs. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
