[time-nuts] Chinese NTP Time server

[paul swed]

Did take a look. The switch is on external and I don't think they added a
10 MHz source.
Though when I start my 5370 without a source the right digit blinks 0 and
stops after 5 seconds. Just blank. The ole forgot to turn the distribution
amp on....
Regards
Paul
WB8TSL

On Tue, Jan 7, 2020 at 5:34 PM Bob Bownes <bownes at gmail.com> wrote:

> Brian,
>
> TICC is one answer, HP 5370 would be another. They can often be had quite
> reasonably on ebay and, short of a SRI counter, seem to be the standard.
> There is one on ebay atm (item 401738800574) for 120 obo that, while
> missing the red filter on the front, probably just needs to have the
> timebase switch moved from 'EXT' to 'INT' on the back, (and maybe a jumper)
> or to be fed 10Mhz from one of your GPSDOs. Assuming it is good. I've had
> good luck with this particular problem.
>
> Bob
>
> On Tue, Jan 7, 2020 at 4:13 PM Brian Lloyd <brian at lloyd.aero> wrote:
>
> >
> > OK, I tried the AD8055A op-amp in the buffer. Output now looks exactly
> > like the output of the OCXO (square wave). Unloaded output is 3.2Vpp.
> > Output into 50 ohms is +10dBm, nice and clean. So, if you buy one and
> > want to add the components to get 10MHz sq-wave output, you need to add
> > a TBA 1-1219 isolated DC/DC converter, and an AD8055A op-amp. Works
> > great. Mouser has them in stock. While I do have hot-air SMD-rework
> > capability, the SOIC-8 package was easy to hand-solder with a small tip
> > on my Hakko solder station so I didn't have to go get solder paste.
> >
> > BTW, the price quoted for a unit WITH 10MHz output was $350,
> > substantially more than the $201 for the non-10MHz unit. For $10 in
> > parts I am happy. OK, it isn't sine-wave output. I don't have anything
> > that requires a sine wave reference.
> >
> > So this meets my needs for NTP stratum-1 for the machines in my house,
> > and 10MHz for my radios.
> >
> > Still, I wish to graduate to full time-nuttery status. I would like to
> > do the ADEV analysis. Other references I have kicking around:
> > Thunderbolt, Leo Bodenar GPSDO, Ephratom LPRO-101 Rb. Unfortunately I
> > don't have a good, free-running OCXO for short-term comparison. Still, I
> > suspect the Rb should work well enough for that. Also, the only device I
> > have to DO the comparison is a Fluke T7260a. Thinking about a TICC.
> Advice?
> >
> > Brian, WB5BL
> > --
> >
> >
> >  <https://www.lloyd.aero>
> >
> > Brian Lloyd
> > 706 Flightline
> > Spring Branch, TX 78070
> > brian at lloyd.aero <mailto://brian@lloyd.aero>
> > +1.210.802.8359
> >
> >
> >
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at lists.febo.com
> > To unsubscribe, go to
> > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> > and follow the instructions there.
> >
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com
> To unsubscribe, go to
> http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com
> and follow the instructions there.
>