[Elecraft] 10 MHz external reference

[Richard W. Solomon]

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:elecraft-bounces at mailman.qth.net] On Behalf Of HankP
Sent: Wednesday, March 09, 2016 8:50 PM
To: elecraft at mailman.qth.net
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:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to w1ksz at earthlink.net