You could get a low cost GPS unit and compare the PPS from it to the PPS from
your setup with the long cable.
Modern GPS receivers are sensitive enough to work with a poor antenna
(indoors) and don't cost much.
--
These are my opinions. I hate spam.
__
Gate drivers are pretty zippy when you leave out the capacitive load of a
power fet's gate. They are also available in 8 pin dip.
On Monday, 8 August 2016, Bob Albert via time-nuts
wrote:
> Your comments on layout made me think again of how to implement these
> projects. How do you use a 14 pin
There are a few adapters over on that "auction" site.
Do a search on 14 pin smd to 14 pin dip.
73, Dick, W1KSZ
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Albert via
time-nuts
Sent: Monday, August 08, 2016 8:37 PM
To: Discussion of precise time
Your comments on layout made me think again of how to implement these projects.
How do you use a 14 pin SMD IC? I could try to connect it with flying leads
but I'd like something better. Is there some kind of socket for these devices?
Or a generic board to receive such things?
Bob
On
For antennas, I believe you’re looking for one of:
142-401
142-602
142-603
142-610
According to legend, these are 12V antennas, using a 16.368MHz LO and 4.092MHz
IF to the receiver. Good luck in finding one :) But if you are diligent and
patient, they do sometimes appear.
It IS possible to hack a
> On Aug 8, 2016, at 7:26 PM, Clay Autery wrote:
>
> Wow... fast turn-around...
>
> I might grab one of these for my NTP project for my home network...
>
> Reckon they’d integrate with the Rasberry-Pi and other similar?
Absolutely. In fact, the prototype has replaced the PA6H on my Pi Zero pu
I actually tested various 74120 dual 4-input NAND drivers which
produce the sync output on my B&K function generator to find ones
which would provide the fastest and cleanest pulse. AS (advanced
schottky) and FAST (fast advanced schottky TTL) were the best for me.
Modern inexpensive discrete logic
Wow... fast turn-around...
I might grab one of these for my NTP project for my home network...
Reckon they'd integrate with the Rasberry-Pi and other similar?
__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 8/8/2016 5:13 PM, Nick Sayer via time-nuts wrote:
>> On Au
> On Aug 5, 2016, at 8:13 PM, Nick Sayer via time-nuts
> wrote:
>
>
> I’m going to make a breakout board for these and list them on Tindie next
> week, for those who wish to play with them.
As promised, the breakout boards are now available.
https://www.tindie.com/products/nsayer/skytraq-ve
First, the nulls are sharper than the peaks. What you do is measure the
frequency of adjacent nulls and calculate what frequency makes both of those a
half wave or multiple thereof. Then you know the number of half waves to the
mismatch. It's the distance from the tee to the remote end.
It ta
I just got an email announcing this:
https://shop.heathkit.com/shop/product/most-reliable-clock-tm-gc-1006-26
They bill it as a "most reliable" clock. From the description it appears to be
an AC line disciplined clock with battery backup.
I only mention it here because of the periodic discussio
If you have a function generator with a sync output, you can use that pulse
into a T connector with your scope to do a TDR measurement of the cable. If
you have a scrap of the new cable, you can use that to calibrate the setup.
Regards,
Tom
- Original Message -
From: "Bob Stewart"
To
Hi Bob,
Correct me if I'm wrong, but for timing purposes, I think that what I want is
the electrical length in nanoseconds, not the physical length. I hadn't
considered the fact that the distance between peaks would give me a halfwave.
But, that's a halfwave of what, exactly? Is it the distan
Hi Bob,
I believe I know the delay for the antenna and Ublox specifies the delay in the
receiver. I can't guess within 20ft of the physical length of the antenna.
But, this is time-nuts, so yeah I want to be able to work this out. And
besides...
I figured out how to output an accurate 1PPS w
Hi
An even more significant question:
Is it worth doing?
More or less:
Do you know the delay numbers for your antenna?
Do you know the delay numbers for your GPS module?
How close can you *guess* the length of the cable?
Knowing absolutely nothing at all about your setup, I’ll guess the ca
I host a group called something like HF Antennas. There I posted a link to an
article on how to measure coaxial cable. The easiest way is with a spectrum
analyzer and a tracking generator.
You connect the generator to the analyzer through a Tee that goes to the
unknown coax. You will see a gr
b...@evoria.net said:
> Earlier this year, with some help, I pulled the dish off of an old DishTV
> antenna on the roof and put a 5V bullet antenna on the mast. I also pulled
> a new cable through by attaching it to the old one. The problem is that I
> was not able to measure the new cable. So,
Earlier this year, with some help, I pulled the dish off of an old DishTV
antenna on the roof and put a 5V bullet antenna on the mast. I also pulled a
new cable through by attaching it to the old one. The problem is that I was
not able to measure the new cable. So, the question is, without go
On 08/04/2016 04:10 PM, Rick Jones wrote:
I have been bequeathed a TrueTime XL-DC, Model 151-601-1, serial number
1671 per a sticker on the side. On the back, on the right as one faces
the back, is a small sticker that says "Down Conv. Req'd"
Unsurprisingly, it has arrived without an antenna.
Hi
We tend to look at all this lighting / EMP stuff very much as a “get to the
ground”
sort of thing. For whatever reason the whole thought process stops once we get
to a coper weld rod driven however far into the dirt.
If you try to operate a vertical antenna against that same rod in the midd
Tomtom had custom voice capability for sat nav years ago, seems to have
disappeared now but I can, from personal experience, confirm how quickly
John Cleese giving 'funny' directions becomes annoying.
On 8 Aug 2016 16:02, "Artek Manuals" wrote:
> On 8/8/2016 7:28 AM, Morris Odell wrote:
>
>> H
On 8/8/2016 7:28 AM, Morris Odell wrote:
Hi all,
There was a thread about this a few weeks ago and I mentioned that I was
working on one with a "Stephen Hawking" voice - well here's a video:
https://youtu.be/lmg0YsHlB3g
So far it's not GPS controlled but that will come one day.
Cheers,
Morri
On 8/7/16 8:06 PM, Bill Hawkins wrote:
This thread grows old, so here's one person's summary:
Marine supply stores sell rolls of 4 inch
wide copper strap for connecting the mast on the wheelhouse cabin with
the keel of fiberglass boats. This is also the ground for all electronic
equipment. The s
Hi!
Now you should try with a Dalek voice :-)
Edésio
On Mon, Aug 08, 2016 at 09:28:26PM +1000, Morris Odell wrote:
> Hi all,
>
> There was a thread about this a few weeks ago and I mentioned that I was
> working on one with a "Stephen Hawking" voice - well here's a video:
>
> https://youtu.be/
Hi all,
There was a thread about this a few weeks ago and I mentioned that I was
working on one with a "Stephen Hawking" voice - well here's a video:
https://youtu.be/lmg0YsHlB3g
So far it's not GPS controlled but that will come one day.
Cheers,
Morris
The DC510 and DC5010 phase lock a 320 MHz varicap oscillator to the 1
MHz reference giving them a 3.125ns single shot timing resolution.
The DC509, DC5009, DC510, and the DC 5010 are reciprocal counters.
The universal timer/counters in the 2236, 2236A, 2247A, and 2252
oscilloscopes phase lock 100
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