I will believe if its the supply going to the inverter, the inverter is
flexible. Most offer a fairly wide range on the input. So 24-28 is most
likely very reasonable.
But continue to research and just maybe you will find better detail.
Pictures may also be helpful.
?? Is it a linear supply feeding
Hi
CMOS is good. The faster the better. Go to your favorite vendor and find
whatever is “king” this month
and that’s what you go with. HC has been around a *long* time and is about as
slow as it gets in terms
of 5V CMOS ( yes, 4000 series is slower still …). Faster means less delay in
the gat
Now it is certain the failure is power supply. I fed 26V into DC port and
everything is working as before. I'd rather replace this faulty supply.
Question is, 24V? 28V? 30V? or 28.45V? This power supply appears to be a
custom unit. Still looking for spec on power supply.
At least it's no
Hi
Yup, pretty much the same questions each time. I’ve given up recommending
specific IC’s since the DIY approach does not seem to be what people are after.
That’s not a problem, I do a *lot* of stuff on a “what’s on eBay?” basis.
Bob
> On Mar 17, 2019, at 4:56 PM, djl wrote:
>
> Gosh. this t
I'm very curious, too. Especially when I *just* built one using 74HC04N.
---
(Mr.) Taka Kamiya
I'm stuck in a wormhole Hello, worms!
On Sunday, March 17, 2019, 4:01:26 PM EDT, Hal Murray
wrote:
> For 1PPs the main goal is jitter and the se
Hi
TAPPR needs that order for 25 TICC’s …… :)
There are indeed many ways to do it and each has it’s advantages and
disadvantages.
With a DMTD sort of system, you can’t grab “off the shelf” hardware to get
things up
and running quickly. Also the isolation / ground loop / spur problem is very
l
Gosh. this topic comes up at least once every 6 months. A diligent
search of the time-nuts database would turn up amazing things. . .
On 2019-03-17 13:24, Hal Murray wrote:
For 1PPs the main goal is jitter and the selection of the ICs is very
tricky
Could you please say more? Do you mean lo
On Sun, 17 Mar 2019 10:58:49 -0400
Bob kb8tq wrote:
> The first thing you need (after all the standards) is a way to do precision
> comparisons of all your devices. There are an infinite number of ways to do
> this. Let’s say you buy 26 TICC’s to do the job ( TAPPR needs 25 ordered to
> get the
On Sun, 17 Mar 2019 12:00:11 -0700
"Tom Van Baak" wrote:
> So yes, NIST, USNO, PTB, BIPM -- all the big boys -- use ensemble
> techniques. But the key is that they mostly use cesium clocks, not OCXO or
> Rb clocks from eBay. Laboratory cesium standards don't suffer from frequency
> drift. The
Yes :-) another one of mine:
< http://www.hoffmann-hochfrequenz.de/downloads/iso_amp.pdf >
It is based on a NIST design and made from discrete transistors.
Unfortunately it also needs RF PNP transistors that are slowly going the
way of the Dodo.
Luckily, I still have a reel of BFG31.
> For 1PPs the main goal is jitter and the selection of the ICs is very tricky
Could you please say more? Do you mean logic family selection, or chip
selection within a family?
Most modern digital chips are CMOS with an input threshold of VCC/2. I'd
expect power supply noise to be importan
> Hi Everyone,I like to know if it possible to run let say 10 GPSDO, 16 Rb clock
> together and take the average to control 1 "master clock" and have better
> stability ?
> like what BIPM or NIST doing.
> I have search about ensemble system but I have no idea how much advantage
> I get from some c
Just a couple of other measurement options on top of Bob's excellent
description.
You could half the number of TICCs by using them in timestamp mode with
a common 10 MHz clock serving as the reference -- in that mode you can
do two simultaneous measurements with each TICC. There are some
har
I have an FTS-4040/A Cesium Oscillator from Datum. It was working last night
and dead today. A/C available LED is lit but nothing else. Checking power
supply, I read 8.9V. (large switching supply on back panel) Rather odd
voltage I thought. Checked some ICs on a board. It's not getting po
I've tried to collect links to frequency/pulse distributor designs over
here:
https://www.ohwr.org/project/pda-8ch-fda-8ch/wikis/Similar-Projects
if something good is missing let me know!
AW
>
> > But how do I do this
> on 10MHz side? I'd like to have minimal distortion
> (sine wave) and hi
Anton
Others will reply but my sense is that there is little advantage in doing
that.
Assuming everything is the same in all 10 systems then you would be
measuring the receiver behaviors at a given moment. I simply am unclear
that there is an advantage.
Regards
Paul.
On Sat, Mar 16, 2019 at 11:00
Hi
The answer is (of course) yes. The somewhat more detailed answer is that it
actually is a practical basement sort of thing *if*
you have the space. I was headed off to do this and changed course. That’s just
my lack of focus rather than it being an
un-doable sort of thing. What’s below is so
> Le 17 mars 2019 à 02:16, Anton Moehammad via time-nuts
> a écrit :
>
> Hi Everyone,I like to know if it possible to run let say 10 GPSDO, 16 Rb
> clock together and take the average to control 1 "master clock" and have
> better stability ?like what BIPM or NIST doing.
I think the answer to
Ignacio,
you will find it looking on Didier's page under 'manuals'
and then searching e.g with 'steinmetz'.
saludos, 73
Arnold, DK2WT
Am 17.03.2019 um 12:15 schrieb EB4APL:
Hi,
It seems that Didier has changed his website somewhat and the links
don't point to the referred documents. Either I
The main problem in the distribution amplifiers for 10 Mhz is phase noise.
There are two appoaches :
the first one with a tuned amplifier like HP 5087A distribution amplifier. have
a look at the manual
the second one is the Racal 9478 wit phase locked VCO.
For 1PPs the main goal is jitter and the
Yep, been there, done that!
I used a modified Extron ADA 3-80, then replaced it with an ADA 6, both of
which did have the CLC409 amps. Eventually, I replaced all with a real DA from
Montronics (Fluke). Had to modify it for 10 MHz, since it maxed out at 5 MHz.
Changing capacitors in tuned circui
Hi,
It seems that Didier has changed his website somewhat and the links
don't point to the referred documents. Either I was not able to find
them navigating within the site.
Regards,
Ignacio, EB4APL
El 17/03/2019 a las 4:57, Charles Steinmetz escribió:
Dave M wrote:
Excellent advice fro
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