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 > > Does anyone happen to have an electronic copy of the user / technical > manual they would share with me?All expenses covered. > This rather unusual unit was produced in the UK in the days or the rather > sensible 200kHz Droitwich transmissions. > Im considering reworking the unit to the newer 198kHz standard. > PeteG4GJL > _______________________________________________ > 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. > -- Stephen Tompsett _______________________________________________ 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.