If it's just locking to the carrier I wonder if it'd be possible to use a suitably modified PICDiv clocked from a 'standard' 10MHz GPS locked device like the Lucent?
On 19 June 2017 at 14:19, GandalfG8--- via time-nuts <time-nuts@febo.com> wrote: > I suppose a converter from 198KHz could be an option but I know of at > least one other experimenter who's run into problems with the Teleswitch > modulation on the Droitwich signal when trying something similar with a > 5090A. > > Although, from one point of view, running it from the present 198KHz > signal might be considered the ultimate goal it's the operation of the > hardware > itself that's of more interest to me in this instance, so I'm quite happy > just to feed it with an accurate 200KHz signal from whatever other sources > are available. > > Nigel, GM8PZR > > > How about building a frequency converter to produce 200KHz; mixing the > incoming RF (198KHz) with 2KHz derived from the output of the unit, > > On 18/06/2017 21:17, GandalfG8--- via time-nuts wrote: > > Hi Pete > That's quite good timing, if you'll pardon the expression:-), as I > uploaded a pdf version of the 5090A manual to mediafire a couple of > months > ago.... http://www.mediafire.com/file/u0bf1eips89uo3h/HP_5090A_Ops_ > and_Service.pdf > I know a few others have considered converting the 5090A to 198KHz but > it's not straightforward and I believe the general consensus has been that > it's not really worth the effort. > I have a 5090B which I'm hoping to get up and running when it finally > reaches the top of the to do list and my view is that it would be much > better > to leave the original electronics undisturbed and to drive it with a 200 > KHz signal divided down from a from a GPSDO or a rubidium module, > although > having one of the latter already running at 800KHz does leave me a bit > biased:-) > Regards > Nigel, GM8PZR > _______________________________________________ > 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. > -- Clint. *No trees were harmed in the sending of this mail. However, a large number of electrons were greatly inconvenienced.* _______________________________________________ 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.