Yep, 3586B put me in the top list two times I used it along with a calibrated SpectrumLab + PC combo. I’d like to use my IC-7610 this time, have to figure all that out I guess as the April test rapidly approaches UTC time I remember now.
Regards, Jerry > On Mar 29, 2018, at 5:21 AM, John Ackermann N8UR <j...@febo.com> wrote: > > The impedance mismatch with the A or B models is't a real issue unless you're > doing precise amplitude measurements. Lots of folks use them for FMT work > without issues. There are adapters available or buildable to deal with the > odd Telco connectors. > > John > > On Mar 29, 2018, 3:04 AM, at 3:04 AM, Ruslan Nabioullin > <rnabioul...@gmail.com> wrote: >> On Wed, Mar 28, 2018 at 9:49 PM, Tisha Hayes <tisha.ha...@gmail.com> >> wrote: >> >>> Perry and I would make our pilgrimages to the Huntsville Ham Fest and >>> usually I ended up buying equipment from him. One of the items he >> sent my >>> way was an HP 3586B that I am finally beginning to put to use. >>> >> >> Hmm that measuring receiver model (diffs can be found in: >> http://www.militaryradio.com/manuals/HP/hp3586-a-b-c.pdf ) was >> apparently >> intended for testing and troubleshooting purposes for those ancient >> FDM-based POTS trunk systems, not as a general-purpose HF measuring >> receiver (the HP 3586C)---I'm not sure how well they would function as >> HF >> receivers for WWV and CHU following impedance adaptation (b/c it >> doesn't >> have a 50 ohm unbalanced interface). >> >> In my case, I supply my time transfer volunteers with the following >> setup: >> >> vertical antenna -> TVSS -> preamplifier -> military rackmount >> preselector >> -> military/intelligence rackmount parametric demodulator or HP 3586C >> -> >> Xeon NTP server via soundcard >> >> with GNU/Linux daemon software which commands the preselector and >> demodulator via GPIB. >> >> Still, WWV/CHU-derived public NTP nodes are virtually nonexistent, and >> therefore there's a strong need for them, regardless of the >> sophistication >> of the receiver, due to the pitfalls of GNSS. >> >> -Ruslan >> >> -- >> Ruslan Nabioullin >> Wittgenstein Laboratories >> rnabioul...@gmail.com >> (508) 523-8535 >> 50 Louise Dr. >> Hollis, NH 03049 >> _______________________________________________ >> 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. _______________________________________________ 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.
