marklgoldb...@gmail.com said:
> I was hoping someone who knows these devices might have some insight into
> what the issue is and how to determine which plans will not provide close in
> spurs, without requiring testing. Any suggestions are appreciated.
If you look at the binary of the word that
Thank you, Charles.
What a clever way to minimize the power dissipation in Q4 with the
components of the day.
A switching regulator without the steep (and noisy) transients of
today's switchers.
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Beha
I am using the Leo Bodnar Single output Mini GPSDO to generate 38.4 MHz as
an input to a Wenzel Oscillator that locks to it and produces a low phase
noise 80 MHz to drive my Perseus SDR. The Wenzel has a low loop bandwidth
so the phase noise from the Bodnar above the 10-100 Hz range does not seem
t
Loney,
You'll find the schematic for the 05245-60033 adapter board at the bottom of:
http://leapsecond.com/museum/10544/
/tvb
- Original Message -
From: "Loney Duncan"
To:
Sent: Monday, January 08, 2018 8:08 PM
Subject: [time-nuts] hp 5245L counters with 10544 and 10811 OCXOs
Gentl
Gentlemen:
I have two 5245L counters which appear to have had a field mod where the
original 1 MHz cylindrical oven standard has been replaced by the 10544 and
10811 10 MHz ones. Both counters have late 4-digit serial prefixes. Both of
the standards plug into an interface circuit board that,
Bill wrote:
What does the unijunction 2N2646 do in the oven controller?
For the following discussion, you need to refer to the *corrected*
schematic I mentioned in my last post. If you are looking at the HP
schematic, you will wonder how the hell it works (and it wouldn't, if HP
actually b
I have a bunch of small, cheap antennas that look like this one. I bought them
for testing some Glonass capable receivers:
https://www.ebay.com/itm/NEW-GPS-GLONASS-Antenna-car-navigation-dvd-C-receiver-Waterproof-gps-antenna-SMA/262621649740?hash=item3d25785b4c:g:OHkAAOSwglZZcC8~
They seem to w
On 1/8/2018 11:12 PM, Neville Michie wrote:
I have just scanned through the Thunderbolt manual and found no information
on the supply of power to the antenna.
Is there a standard for the supply of power to the antenna?
Are there 3.3v , 5v and 12v antennae?
Will any antenna work safely on any GPS
Hi
The normal TBolt supplies 5V to the antenna. There *are* some 3.3V only antennas
out there. You could blow one up with a TBolt. There are also survey oriented
receivers (and antennas) that work at 12V. Most 5V (but not all) antennas will
fry
if hooked to a 12V receiver.
Current wise, you pr
I have just scanned through the Thunderbolt manual and found no information
on the supply of power to the antenna.
Is there a standard for the supply of power to the antenna?
Are there 3.3v , 5v and 12v antennae?
Will any antenna work safely on any GPS receiver?
It is just a question that I had ne
Hi, Duane,
I am actually using a small commercial GPS antenna with the small
(lossy!!) coax and getting good results.
It is either a Garmin or Gilsson "puck" style antenna with 15 feet of
that terrible coax, mounted on a 3 foot wooden pole at the peak of the
roof. The antenna sits on a cast
Hi
Depending on the noise floor of the phase detector (which probably is not super
duper), even the noise *inside* the PLL bandwidth may not be all that great.
Bob
> On Jan 8, 2018, at 2:23 PM, Bruce Griffiths
> wrote:
>
> Yes, but the PN noise (outside the PLL bandwidth) will be much higher
Yes, but the PN noise (outside the PLL bandwidth) will be much higher than with
a classical multiplier.
Bruce
>
> On 09 January 2018 at 02:14 Chris Wilson wrote:
>
> Hello Bruce, Sorry, this went to you direct as well, in error.
>
> Thanks for the very fast reply! Would it be pos
Thanks for all the responses. So even a $13 active hockey puck antenna should
work: https://www.adafruit.com/product/960 I'll get an antenna on order.
___
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To unsubscribe, go to https://www.febo.com/cgi-bin/mai
Charles,
What does the unijunction 2N2646 do in the oven controller?
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles
Steinmetz
Sent: Monday, January 08, 2018 7:50 AM
Also, note that the HP schematics of the 10544 have some error
Hi from Florida (it is atypical cool),ly
`
Ref 1 is really only good for an insight but to use it makes no sens and the
names in ref 2 are out of order, that makes no difference.
Ulrich
In a message dated 1/8/2018 9:02:47 AM Eastern Standard Time, att...@kinali.ch
writes:
Moin
Discla
Just being curious, I took 100' of RG-174 and connected one of those
"Hockey Puck" antennas to one of my Trimble Thunderbolts. Stuck the
antenna on a south facing window and had no trouble getting a lock.
I did not do any fine measurements, just looked at TBoltMon.
73, Dick, W1KSZ
Sent from
On Mon, 8 Jan 2018 13:14:16 +
Chris Wilson wrote:
> Thanks for the very fast reply! Would it be possible to use one of
> these frequency multiplier IC's? Sounds simpler, but maybe there are
> down sides?
>
> http://uk.farnell.com/on-semiconductor/nb3n502dg/pll-clock-multiplier-8soic/dp/21018
Moin
Disclaimer: I am by far not an expert in oscillators. Please correct me if
I am wrong.
I am putting my replies to a few mails together into one, as not to clutter
the mailinglist too much.
On Sat, 6 Jan 2018 19:53:20 +1300
donald collie wrote:
> So to be lowest noise, an oscillator should
Don wrote:
I`m looking at the circuit of an HP10544 oscillator - can anybody confirm,
please, if the HP transistor types 53-20, and 54-215 have commercial
equivalents?
54-215 (full HP part number 1854-0215) is the ubiquitous 2N3904.
53-20 (full HP part number 1853-0020) is 2N3702. 2N4403 is
Hello Bruce, Sorry, this went to you direct as well, in error.
Thanks for the very fast reply! Would it be possible to use one of
these frequency multiplier IC's? Sounds simpler, but maybe there are
down sides?
http://uk.farnell.com/on-semiconductor/nb3n502dg/pll-clock-multiplier-8soic/dp/2101849
Divide the 10MHz by 2 and use a filter to extract the fifth harmonic from the
5MHz square wave output.
Amplify the 25MHz output from the filter if required...
Bruce
>
> On 09 January 2018 at 00:31 Chris Wilson wrote:
>
> 08/01/2018 11:28
>
> Is there an easy way to get 25 or 27
08/01/2018 11:28
Is there an easy way to get 25 or 27 MHz from my Trimble Thunderbolt
as a reference clock at 1v P to P square wave for a Si5351a
synthesizer chip please? I have the David Partridge divider board from
way back that is still going strong, but 25 MHz is not an option as it
divide
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