On Sat, Oct 25, 2014 at 7:26 PM, Giuseppe Marullo giuse...@marullo.it
wrote:
I know Arduino could be a solution, just wanted to know if something
smaller
is available, possibly with rs232.
An Arduino can by pretty small. Here is an Arduino compatible that can do
exactly what you ask for.
Hi
Probably an important question to ask - how much current does this sub-species
of the Z series pull off of 24V?
My *guess* would be it pulls a couple of watts (say 6W) per box once the OCXO
is warmed up. If so, that would be just under 1/4 A on the 28V supply and just
over that as the
Marullo
Thats a mighty old radio.
That being said reading the frequency of the VFO may or may not work out
for you.
The actual frequency will be made up of a number of other frequencies that
are injected at different stages.
Drake as an example actually uses the VFO in a plus or add on some bands
Bob others
I have the Lucent pair, RFTG-m XO and m-Rb and I have never succeeded in
obtaining an interface to communicate with them. Is it possible that with so
many manufacturers being involved with the specification and build, that an
interface is available ?
Roy
-Original
Ahh, I read adjust the regulated float power supply to 28 volts as
including the protection diode as part of the PS and 28VDC straight to
batteries.
Have a half built setup like this on the bench right now.
36VDC unreg supply feeding 2 LM317 regulators with 5amp diodes on output.
Once floats a
There are a variety of inexpensive wall-wart packaged float chargers for
lead acid batteries around. Might be easier to just get something off
the shelf.
http://www.power-sonic.com/images/powersonic/chargers/AC-Series_12_Aug_15.pdf
Hi
Since some of these RFTG’s seem to have different KS numbers, it’s quite
possible that they have different interface requirements. They never were
intended as a stand alone piece of gear. The intent was to burry them deep
inside a Lucent basestation. The only thing that would ever talk to
Giuseppe,
If you look at http://www.radiomanual.info/schemi/FT102_user_VA3VFO.pdf
you realize that the display is the result of a frequency counter being
built in. You could either tap in and count yourself, or you could tap a
whole number of other points depending on what you are after.
I pulled both boards out of the cases and have uploaded some shots of the
undersides of the boards (http://goo.gl/87e8GG). With the GPS-equipped board
powered on (but no GPS attached), there was no single coming out of the pads
for the 10MHz SMA adapter. The only part missing that I see
Hi Marullo
look there: http://www.aade.com/dfd.htm almost plug and play frequency
display for ham radio
73
KJ6UHN
Alex
Hello,
just wanted to know if there is any very cheap pre programmed pic or
something similar to get frequency of a Yaesu FT-102 radio.
I need it to know its frequency,
On Sun, Oct 26, 2014 at 10:29 AM, Jim Lux jim...@earthlink.net wrote:
There are a variety of inexpensive wall-wart packaged float chargers for
lead acid batteries around. Might be easier to just get something off the
shelf.
http://www.power-sonic.com/images/powersonic/chargers/AC-
Hello All,
Can I have your recommendation regarding a choice of 10 MHz rubidium source
(available now on eBay like FE-5680; LPRO-101; LPFRS; FRS etc.) as a
reference signal for my frequency counter Pendulum CNT-91.
Thanks in advance.
Karen, ra3apw
---
Это сообщение свободно от
Hi Jim,
I think these chargers are only meant for float charging the battery. They
are not meant to supply a load (GPSDO) current.
It is more for connecting to your motorcycle or tractor battery and keeping
it fully charged over winter storage conditions.
I just picked up a MeanWell 24 volt
Karen,
PRS-10..
Sent From iPhone
On Oct 26, 2014, at 10:46, Karen Tadevosyan ra3...@mail.ru wrote:
Hello All,
Can I have your recommendation regarding a choice of 10 MHz rubidium source
(available now on eBay like FE-5680; LPRO-101; LPFRS; FRS etc.) as a
reference signal for my
On 10/26/14, 10:43 AM, Brian Lloyd wrote:
On Sun, Oct 26, 2014 at 10:29 AM, Jim Lux jim...@earthlink.net wrote:
There are a variety of inexpensive wall-wart packaged float chargers for
lead acid batteries around. Might be easier to just get something off the
shelf.
Hi:
The Gibbs 5 Mhz frequency standard used a two step power supply system.
http://prc68.com/I/office_equip.html
It uses a couple of series connected UA723 based power supplies. One to drop the AC line to 20 VDC to float charge 3
series connected 6 Volt (18 V total) lead acid batteries and the
Hi Anthony,
Thanks for more pics. Was there any indication of where the 10MHz gets its
signal? Could you see a trace, or did I miss that in the pics? I'm a bit too
ham-fisted to go prodding around in mine, so I've left it closed after an
initial urge to see the top of the board.
Bob
On 10/26/14, 10:59 AM, Tom Miller wrote:
Hi Jim,
I think these chargers are only meant for float charging the battery.
They are not meant to supply a load (GPSDO) current.
It is more for connecting to your motorcycle or tractor battery and
keeping it fully charged over winter storage
I have not yet investigated further, but I didn't see any obvious traces. I
need to get a bright light behind the board and see if there is an internal
layer that I can trace. I'll let you know what I find.
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On
I know what your next question will be, I see that these rubidium
oscillators all can be adjusted over a range that falls on both sides of
10MHz. What should I use as a calibration source to adjust my rubidium
oscillator? Then you think If I have this 10MHz calibration source, why
not just run
Alex thats quite a good answer to the problem with a wide selection of
solutions that account for the IFs and such,
Marullo looks like you have a solution. Even a choice of displays.
Regards
Paul
WB8TSL
On Sun, Oct 26, 2014 at 12:47 PM, Alex Pummer a...@pcscons.com wrote:
Hi Marullo
look
Where did you get it?
On 10/26/2014 1:59 PM, Tom Miller wrote:
Hi Jim,
I think these chargers are only meant for float charging the battery.
They are not meant to supply a load (GPSDO) current.
It is more for connecting to your motorcycle or tractor battery and
keeping it fully charged over
Karen
To a large degree it depends on what you want to use it for. HP 5065 is
considered top of the line and PRS 10 is a very nice Rb but lately I have seen
lamp oscillator failures. I like FRK, well documented easy to modify and
if done right super performance.
As part of a GPSDO project
Can I have your recommendation regarding a choice of 10 MHz rubidium source
(available now on eBay like FE-5680; LPRO-101; LPFRS; FRS etc.) as a
reference signal for my frequency counter Pendulum CNT-91.
You might take a look at the plots at http://www.ke5fx.com/rb.htm if you
haven't
Marullo looks like you have a solution. Even a choice of displays.
Paul and others,
thanks but that was not exactly what I was searching for. You did give
me very good suggestions but my problem is a little more subtle.
I just need the simplest chip incarnation that would provide me with
On 26/10/2014 17:47, Alex Pummer wrote:
Hi Marullo
look there: http://www.aade.com/dfd.htm almost plug and play
frequency display for ham radio
73
KJ6UHN
Alex
Hello Alex,
I answered to all in another message, but yes I know AADE, I got my
son(7yo at the time) build me the LC Meter, I
An Arduino can by pretty small. Here is an Arduino compatible that can
do exactly what you ask for.
https://www.sparkfun.com/products/12765 You can find these on eBay for
a lower price.
Yes, 3.1 version is even better, up to 60MHz:
https://www.pjrc.com/teensy/td_libs_FreqCount.html
A very
Hi Karen:
The ones you mention are all stand alone Rb oscillators that need to be
calibrated to set their frequency.
This was the historical way that crystal oscillators were calibrated every year or so. The great advantage of Rb over
crystal oscillators is that their drift is specified in
On 26/10/2014 17:49, Magnus Danielson wrote:
Giuseppe,
If you look at http://www.radiomanual.info/schemi/FT102_user_VA3VFO.pdf
you realize that the display is the result of a frequency counter
being built in. You could either tap in and count yourself, or you
could tap a whole number of other
Brooke,
One use for the R variants of the Fluke/Pendulum counters is/was for
calibrating base-stations. They had issues with ovens and turning the
counter to the side as you lifted it up. A rubidium inside solved that
in a nice way.
It's not all government work you know. :)
Cheers,
Magnus
I know what your next question will be, I see that these rubidium
oscillators all can be adjusted over a range that falls on both sides of
10MHz. What should I use as a calibration source to adjust my rubidium
oscillator? Then you think If I have this 10MHz calibration source, why
not just
Hi Magnus:
I've also heard that in order to calibrate rack mount crystal oscillators in instruments they need to be in the same
orientation as when mounted in the rack. So you can not remove the instrument from the rack and turn it on it's side
for the cal. So for some instruments that means
b...@evoria.net said:
Thanks for more pics. Was there any indication of where the 10MHz gets its
signal? Could you see a trace, or did I miss that in the pics? I'm a bit
too ham-fisted to go prodding around in mine, so I've left it closed after
an initial urge to see the top of the board.
In message CAGVVbuFAM=u5Uhdf+wgTUNuoeMZ+=pzwq4jpugjnjdd60fg...@mail.gmail.com
, Brian Lloyd writes:
There are a variety of inexpensive wall-wart packaged float chargers for
lead acid batteries around. Might be easier to just get something off the
shelf.
Some of these things are
Hi Brooke,
I wonder which instruments that would be, as most of them calibrate
easily standing flat on the bench.
Cheers,
Magnus
On 10/26/2014 11:01 PM, Brooke Clarke wrote:
Hi Magnus:
I've also heard that in order to calibrate rack mount crystal
oscillators in instruments they need to be
So far:
- cheapest is Cheapduino
- most poweful is Teensy (3.1 version goes up to 60MHz) but I don't know
how to program it.
The Teensy 3 can be programmed using the Arduino software. It's just a
better Arduino, that's it.
But you say you have a PI. Why not use that? send your final RF
Something like this one:
https://www.tindie.com/products/isp51/60mhz-lcd-frequency-counter-module-and-if-offset-user-definable-and-uart-usb-read-1/
I would not even need the display. Ok, I don't think it will have top
notch accuracy, but ...
___
Hal - there's nothing coming out of those connectors. I'll explore again once
I can get my GPS connected to the unit and see if that changes anything.
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray
Sent: Sunday, October 26, 2014 4:11 PM
Said,
Thank you for the advice.
Can I have the arguments for this decision taking into account that the cost of
PRS-10 is much higher than other mentioned rubidium sources .
Karen, ra3apw
Date: Sun, 26 Oct 2014 11:13:06 -0700
From: Said Jackson saidj...@aol.com
Karen,
PRS-10..
Sent From
I hope to use homemade GPSDO for the rubidium oscillator calibration.
Karen, ra3apw
Date: Sun, 26 Oct 2014 12:01:28 -0700
From: Chris Albertson albertson.ch...@gmail.com
I know what your next question will be, I see that these rubidium
oscillators all can be adjusted over a range that falls
Hi Paul,
do you know about TDRs? I have a CSA803A with SD24 dual TDR head,
which I did not used for at least five years, now I needed it and found,
that in high resolution --below10psec --it became very noisy, [both
channels] any idea? the box is cca 15 years old , power-supply?
73
Alex
On
Living in south Florida backup power is short term and long term. As lab
batteries I use T 105 also known as Golf Cart batteries. Costco has those 6
Volt 200+A batteries for less than $ 80. Super price. Yes I have Costco
stock. For charging I use a VIctron Energy Phoenix 12 V 30 A charger.
Alex
Oddly I am familiar with TDRs. The curious point would be why you even
asked??
Thats sort of out of the blue.
Given that we are drifting off Marullos thread and even further from
time-nuts perhaps we could work off line on your question. By the way thats
a heck of a scope.
Regards
Paul
WB8TSL
A very interesting subject. If I am not mistaken the HP CS battery backup
supplies use a charger and post regulator/inverter. The charger is well
designed but linear as I recall. I have one in the basement with 2 X 28
Amp hour SLA batteries. Purchased new. I screwed around with flea market
duds.
Hi Karen,
the price is much higher because it is a much better oscillator. Much lower
phase noise, much better ADEV, less drift, and 1PPS disciplining input,
so you just need to connect it to a GPS 1PPS output for a day or so. Even if
you don't care about Phase noise now you may in the
Alex,
Nice combo, have one of those myself. Do check the power-lines.
The time-base is very analog for the high-res stuff.
Cheers,
Magnus
On 10/27/2014 12:05 AM, Alexander Pummer wrote:
Hi Paul,
do you know about TDRs? I have a CSA803A with SD24 dual TDR head,
which I did not used for at
On Sun, Oct 26, 2014 at 2:05 PM, Karen Tadevosyan ra3...@mail.ru wrote:
I hope to use homemade GPSDO for the rubidium oscillator calibration.
You can save a little if you build a GPS disciplined Rb. It is just like
building a GPSDO but you use the Rb in place of the OCXO. Saves money and
I
I had a sail boat with six of those T105 batteries and the big AC charger
too. But I was running lights, a microwave oven, radios and so on. Those
batteries held kilowatt-hours of energy. That is gross over kill for a
GPSDO.
The simplest setup for a low power device is a LiPo battery of the
I would avoid those RC lipo packs like the plague or Ebola... they are made up
of pouch cells (not AA sized cells) and many/most are of dubious quality. They
are designed to last a few cycles of very high-output runs. They tend to puff
up and go unstable and do fun things like spontaneously
A pack made up of QUALITY 18650 sized cylindrical Li-ion cells would be a
much wiser choice. Only use cells from well known big-name makers (Sanyo,
Panasonic, Samsung, Sony). And make sure they are genuine cells.
Yes, buy decent packs made from soldered batteries. Used as a backup to a
low
HI
We seem to have drifted a bit.
This started out as a supply for the Z3xxx Lucent GPSDO’s. In those units, you
have a 24 volt switcher that is driven off of the battery or linear supply.
Since it’s designed as an isolated supply, I doubt the switcher in the GPSDO is
looking for a very clean
Hi Bob,
The little brick says it's happy with 18-36V.
Bob
From: Bob Camp kb...@n1k.org
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sunday, October 26, 2014 10:37 PM
Subject: Re: [time-nuts] float chargers for oscillator backup power
HI
We
This list has a lot of discussion of HP 5370 time-interval counters,
including the BeagleBone CPU upgrade. The usual sources seem to have HP
5371, 5372, and 5373 units available as well. From the profession of model
numbers, and the cosmetics of the front panels, one might assume that these
are
b...@evoria.net said:
The little brick says it's happy with 18-36V.
A 2:1 range of input voltage is common for power bricks.
On page 5-4, the Z3801A manual says:
BTS 27 nominal 19-30 operating, over 23 starting
BSC 54 nominal 37-60 operating, over 46 starting
A couple of other
54 matches
Mail list logo
