Hi Giuseppe, Welcome to the group. If you are already happy constructing equipment and have basic test gear ('scope, DMM) and a small budget, I'd suggest a timing GPS as a starting point. While a Thunderbolt will give most of what you want, it is more expensive. A Timing version or Motorola's Oncore <(ebay item 300355981024 from flukel for instance) will give you an accurate 1 pulse per second output (you also need a power supply antenna and a PC). This and a 'scope will allow you to calibrate other instruments and a oven controlled crystal oscillator. A GPS based solution (including Thunderbolt) will give you good confidence of accuracy. Just buying a surplus Rubidium could result in you adjusting all your instruments to the wrong frequency! Like many of these decisions, it's a balance between time and money, with a lesser input from your capabilities and existing equipment. Robert G8RPI.
--- On Mon, 28/12/09, Giuseppe Marullo <giuse...@marullo.it> wrote: From: Giuseppe Marullo <giuse...@marullo.it> Subject: Re: [time-nuts] Timenoob - Cheap and simple 10MHz reference To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Date: Monday, 28 December, 2009, 0:56 Thanks a lot to all for your quick answer. Rubinium should be good for my needs, but buying it surplus makes me think I could get something very used (and abused) and it does not have the self correcting thing thunderbolt has. GPSDO gives me also the time, maybe with a supercool LCD display. > A Thunderbolt needs a triple supply (+12, -12, and +5) to operate. It also > needs a GPS antenna of some sort. Do you know exactly the power requirement? On Ebay I read 15W then few mA on each branch (board only). Something is not clear to me. The dark side of the noon already embraced I have.... Giuseppe PS: I am experiencing mail problems for the first time in many years, please anyone willing to contact me directly do cc copy also this other email address: giuseppe.maru...@iname.com while my ISP gathers back all the bits they lost (2 days of emails vanished from my IMAP account under my eyes, literally) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.