Yes, I bought one as well, along with the matching 8 channel distribution amplifier which is equally well made.
There is a review by VK2XAX Tim Tuck of a later model which may have fixed that tiny error in phase. I also read an interesting article about the 5MHz leakage from the Morion Oscillator ( at -50dBc). [The Morion is really a 5MHz OS X with a frequency doubler to 10 MHz] and yes, I do know what a double oven is and we are not referring to that type of double. I hope the following link works for Tim's review of the GPDSO https://drive.google.com/file/d/0B9Oysj7clpT7YTBWSjlfNTI1aTQ/view 73 David Anderson GM4JJJ > On 31 Oct 2015, at 18:40, Bob W7AVK <[email protected]> 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 > k ______________________________________________________________ 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]
