I see both a sine wave and a square wave version available on ebay. The K3EXREF doc references both w/ regard to signal source, so I assume either would work.
Initially, I'll only be connecting a K3, is one a better choice than the other? Jeff KC9WSJ On 10/31/2015 01:40 PM, Bob W7AVK wrote: > For evaluation I purchased last spring directly from China one of the > BG7TBL 10 mhz sine output GPS Defined Oscillators when the price was > $125. These very nice units are now being sold from CA for a bit more > and comes with everything needed, Unit, GPS antenna, power supply. > http://www.ebay.com/itm/10MHZ-Output-Sine-Wave-GPS-Disciplined-Clock-GPSDO-GPS-Antenna-Power-Supply-US-/261977676713?hash=item3cff161ba9:g:ZJQAAOSwrklVf3wV > > > It uses the Russian Morion Double oven crystal oscillators controlled > by voltage feedback against the GPS1 pulse per second signal using a > very long time constant control loop. If you would like a block > drawing contact me directly. > > I gave the unit to KE5FX, a member of the "Time Nuts" group, who has > the equipment to evaluate it. His results are posted at > http://www.ke5fx.com/gpscomp.htm It was found due to the pulse width > method of creating the Morion oscillator control voltage this unit was > operating 2 to 3 times ten to the minus 11 cycles low. I wouldn't > get too upset at this as that error would only be 3 hz off at 100 GHZ. > > Found the unit works great as a master reference for not only the K3 > but lab gear like counters and signal generators. > > 73 Bob W7AVK ______________________________________________________________ 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]
