On Sat, 24 Mar 2012 00:36:03 -0700, Larry McDavid wrote:
> ABC Electronics (unknown to me) has listed on eBay as Item 330706988007
> seven Racal 9462 P/N 454879 Rev A ocxo supplied by Racal as Option 04E.
> The seller describes these as 5 MHz but the picture shows the Racal
> frequency doubler boa
Does it have a way to 'control' it (discipline?) for use in a gps-timing
application.
--
-Original Message-
From: cfo
Sent: Sunday, March 25, 2012 2:27 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] R
http://geomag.usgs.gov/storms/
--
Chuck Forsberg WA7KGX N2469R c...@omen.com www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
Omen Technology Inc "The High Reliability Software"
10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430
_
Juerg wrote:
Having a M12+Timing GPS driving the 1 Hz input of my PRS10. I decided
to upgrade my house referenc switching to a Tbolt as the 1 Hz source.
* * *
Tests showed maximum deviation of 2 nsec with the Tbolt over 1000
seconds
* * *
Here are my questions:
Are 2 nsec acceptabl
I need a distribution amp for my Tbolt , with 6..8+ outputs
The TAPR-1 is NA , and the successor status is ???.
I need it for distributing 10Mhz ref-clock to Counters
(HP,Racal,Phillips), a Rigol Sig-gen & maybe Oscilloscopes etc.
It's for "better than ocxo/hobby use" , and not Tnut (ps accurac
I think people have used video amps. I got one recently for nearly
zero cost and it works as spec'd but video signals are typically 1
volt peak to peak and the amp is spec'd for "10MHz, 1dB" which means
I'm right at the limit and I'm a 1 dB down, just as the spec says.
Is 1V P-P enough for your eq
Chris, that's got to be a really old video distribution amplifier. I was
just given a thin rack-mount video distribution amplifier with ten
outputs and the specification says 300 MHz bandwidth at 3 dB. I have not
measured its output level. It is made by Kramer and has BNC and S-video
in/out but
cfo wrote:
I need a distribution amp for my Tbolt , with 6..8+ outputs
The TAPR-1 is NA , and the successor status is ???.
I need it for distributing 10Mhz ref-clock to Counters
(HP,Racal,Phillips), a Rigol Sig-gen& maybe Oscilloscopes etc.
It's for "better than ocxo/hobby use" , and not Tnut
Well the easy answer.
The older 1984 video amps would roll off above 6 MC or so.
However as the IC technology took over they easily could do 30 Mhz.
I have used Grass valley 8500 series for at least 10-15 years and the work
very well.
I also have sets of Leitch DAs that are fine.
Picked up the whol
Sounds like Paul and I have similar DA's or will soon when a Leitch gets to the
front porch next week. Its bandwidth is spec'd at 30 MHz.
The only question I have on using DA's is the effect of them being designed to
work in a 75 ohm environment.
One thing to watch out for is what cards they have
Has anyone measured Phase Noise on any of these distribution amps? By looking
at how widely the PN specs vary on the application specific Symmetricom and HP
DA's it would be interesting to see how well these video da's perform in
comparison.
Thomas Knox
> Date: Sun, 25 Mar 2012 12:28:56 -07
On Sun, Mar 25, 2012 at 12:28 PM, Pete Lancashire
wrote:
>
> The only question I have on using DA's is the effect of them being designed to
> work in a 75 ohm environment.
Swap out a few resistors and you can fix the above problem.unless
they used those 75 ohm BNCs but those are rare and if
I haven't measured the video amps, but here are plots of an HP 5087A,
TADD-1, and Spectracom 8140 tap unit for a baseline:
http://febo.com/pages/amplifier_phase_noise/
John
Tom Knox said the following on 03/25/2012 03:48 PM:
Has anyone measured Phase Noise on any of these distribution a
Bruce wrote:
A circuit schematic for a current feedback triple with reasonably
low noise and distortion is attached.
One caution regarding the 100 uH inductor (L3) -- many inductors of
this value exhibit self-resonance below 10 MHz, so some care may be
necessary in selection.
Best regards,
I'm 99% sure that is all it is .. one thing nice about using something
designed 20 yrs
ago is it wont be a hybrid with the termination on the ceramic. :-)
On Sun, Mar 25, 2012 at 12:51 PM, Chris Albertson
wrote:
> On Sun, Mar 25, 2012 at 12:28 PM, Pete Lancashire
> wrote:
>
>>
>> The only questi
I have just pulled a 10 MHz Piezo model 2910109 from an old C band uplink
system. Anyone have a pinout? It has seven pins of which two were connected.
Tnx!
Mike, N1JEZ
"A closed mouth gathers no feet"
___
time-nuts mailing list -- time-nuts@febo.
I need a distribution amp for my Tbolt , with 6..8+ outputs
The TAPR-1 is NA , and the successor status is ???.
I need it for distributing 10Mhz ref-clock to Counters
(HP,Racal,Phillips), a Rigol Sig-gen & maybe Oscilloscopes etc.
It's for "better than ocxo/hobby use" , and not Tnut (ps accur
On Mon, 26 Mar 2012 08:11:16 +1300, Bruce Griffiths wrote:
> Bruce Griffiths wrote:
> A circuit schematic for a current feedback triple with reasonably low
> noise and distortion is attached.
>
> Bruce
Thanx Bruce
I'm an analog noob , so i have some questions.
If i multiply that schematic by
Thats the RGB amps I have used the Extrons. Its in the basement and worked
very well.
Could not remember the name.
On Sun, Mar 25, 2012 at 4:02 PM, cfo wrote:
> On Mon, 26 Mar 2012 08:11:16 +1300, Bruce Griffiths wrote:
>
> > Bruce Griffiths wrote:
>
> > A circuit schematic for a current feedbac
For those of you looking for a new design GPS receiver module compatible with
the Motorola M12+ and M12M receivers, Synergy has developed the u-blox based
SSR-6Tr that is plug compatible with M12x receivers. The SSR-6tr includes
Motorola binary protocol as well as u-blox binary and NMEA protocol
I just picked up a Lucent KS-24019L116 GPS Timing antenna and wondered if anyone
here has information on the antenna. I do know that it has 40dB of gain. But I
don't
know what the power supply voltage is suppose to be. I would assume +5VDC. If
any has information I would appreciate getting it if p
I'm not so sure about the circuit. The base drive on Q3 is more of less
AC given that the resistor can only pull current out of the base. That
is, I don't see a DC bias on Q3.
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On Sun, 25 Mar 2012 16:39:57 -0700, gary wrote:
>I'm not so sure about the circuit. The base drive on Q3 is more of less
>AC given that the resistor can only pull current out of the base. That
>is, I don't see a DC bias on Q3.
R7, R8, and LED D2 sets the base voltage at about 1.8 volts through
Gotcha. LEDs are hetero junction, yielding more than a diode drop.
On 3/25/2012 5:05 PM, David wrote:
On Sun, 25 Mar 2012 16:39:57 -0700, gary wrote:
I'm not so sure about the circuit. The base drive on Q3 is more of less
AC given that the resistor can only pull current out of the base. That
I forgot to mention that those old jedec part numbers specify a package
and electrical limit under one part number. That is, you can't find say
a 1n914 in SMD, but you can find direct equivalents with other numbers.
You will find supply houses listing SMD versions of jedec parts, but
technicall
El 26/03/2012 02:35, gary escribió:
I forgot to mention that those old jedec part numbers specify a
package and electrical limit under one part number. That is, you can't
find say a 1n914 in SMD, but you can find direct equivalents with
other numbers. You will find supply houses listing SMD ver
MMBD914 !=1n914.
1n914BWTm i.e. using a suffix, is something I haven't seen before, but
technically
1N914BWT != 1n914. That is, in the strict sense, the 1n914 has to be a
diode in that glass package.
On 3/25/2012 5:48 PM, Javier Herrero wrote:
El 26/03/2012 02:35, gary escribió:
I forgot t
Charles P. Steinmetz wrote:
Bruce wrote:
A circuit schematic for a current feedback triple with reasonably low
noise and distortion is attached.
One caution regarding the 100 uH inductor (L3) -- many inductors of
this value exhibit self-resonance below 10 MHz, so some care may be
necessary
cfo wrote:
On Mon, 26 Mar 2012 08:11:16 +1300, Bruce Griffiths wrote:
Bruce Griffiths wrote:
A circuit schematic for a current feedback triple with reasonably low
noise and distortion is attached.
Bruce
Thanx Bruce
I'm an analog noob , so i have some questions.
If i mul
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