Hi Ulrich,
I'm in the same boat as you and had no luck finding anything on this
unit. I did contact Bob in China (fluke.l) about this and he just sent
me the one on the Z3801/16 so no luck there. I can tell you that it
does work fine with GPSCon, as demonstrated in the fluke.l's listings.
The cont
I use a Lynx One sound card, it has analog and digital I/O and MIDI I/O
and clock I/O. Their manuals are available on line at
www.lynxstudio.com. These are profession 24 bit cards, the analog I/O
uses balanced interfaces. They handle AES/EBU and SP DIF digital audio
formats.
The sound card
Most likely failures on power supplies are with the power components.
Failure of the pass transistor in a linear supply is likely to result in
overvoltage at the output, while failure of the switch on a switchmode
supply will blow the fuse instantly.
It is been my experience (after 30 years in the
The other issue is noise from a switcher.
2009/6/2 Hal Murray :
>
> phill...@btinternet.com said:
>> I would recommend using a linear PSU, I have some made by a Company
>> called Lascar (perhaps a different name in the States). These are not
>> much larger than the Thunderbolt itself with a litt
Hello,
I have a TrueTime XL-AK, model 600-101-036, that appears to have a similar
problem to what Tom Van Baak reported with his unit last summer.
I set up the unit with the TrueTime antenna and let the unit sit for 24
hours in AUTO mode. It correctly identified my location and switched to
TIME
Much to my amazement, I did find some notes on the DB-25 15Mhz board pinout:
1 +24V
2 +24V
3 Gnd
4 Gnd
5
6 Freq Adj (this goes directly to the FRS, the board does nothing with it)
7 Gnd
8 -Enable +
9
10 Enable - (notes are unclear on 8, 10, 11, 12. See note below)
11 To 11 on other unit
12 to Fau
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of Rex Moncur
> Sent: Monday, June 01, 2009 3:00 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: [time-nuts] Sound Cards for locking to GPSDO 10 MHz
> refere
The concern I'd have with modifying a USB sound card, or any of them for
that matter, is that the glue logic between the ADC and the USB chip may be
designed for a certain relationship between the ADC and USB clocks. Running
the ADC asynchronously may or may not be robust depending on the assumpti
rmon...@bigpond.net.au said:
> For info the purpose of this request is that we are looking at using
> very narrow bandwidth modes at less than 1 mHz for light wave
> communcation. To date using LEDs and cloud reflection we have worked
> over 200 km with WSJT but we should be able to do 20 dB bett
Hi Jeff
Thanks for your advice which I will follow up - the reason for going for a
USB sound card is that the system must be operated portable with a Laptop -
but perhaps there is a way to use a PCI sound card on a Laptop.
While we use WSJT at present we have a new Mode under development for the
I have seen it talked about (around the LF fraternity, but generally they
are stable enough there and just need calibation) a lot but not accomplished
yet.
How about injection locking the on board oscmaybe gating the feedback
with the referencenote I havent tried this? Another technique I
Soundcards for USB are poor at best.
I have a set of PCI cards that were previously made by EMU and they accept
external reference input. They no longer make the model I have but perhaps
they have another PCI card with an external ref input.
I am interested in your modulation technique which
Hi all
Does anyone have any experience of locking a USB external soundcard to a
GPSDO 10 MHz reference.
I am interested in advice on any good quality soundcards that can be readily
locked to either 10 MHz or if necessary to some other frequency that we can
derive from a GPSDO source. I have d
Hi Robert,
very good point, one more issue is the number of components used.
On switchers, this is easily 10x to 15x the number of components used on a
simple linear supply.
Every component and it's solder-joints are a statistical sources of
failure.
bye,
Said
In a message dated 6/
Most switch mode power supplies actually run a voltage doubler on the input
when running on 110V. This puts over 300V across the transformer and switch.
Also the regulation loop crosses the isolation barrier introducing more failure
points that can result in overvoltage.
Robert G8RPI.
--- On
Yeah, I guess they really are 2U, but they're still thinner than the
other HP counters.
John
Hal Murray wrote:
Also, don't underestimate the 5334 counters. They are very capable,
though they don't have all the math and statistics functions of the
'35, they are only 1U in height *and have
> Also, don't underestimate the 5334 counters. They are very capable,
> though they don't have all the math and statistics functions of the
> '35, they are only 1U in height *and have no fan!!!*, and I've bought
> several via eBay for $150 or less.
Mine are 2U Yes, No fan !!
A wonderful st
A slick way of adding a Tbolt monitor and UPS is to use an old laptop that has
a CD drive that runs off of a 12V supply. Most CD drives draw a similar amount
of power as the Tbolt. Remove the CD drive and power the Tbolt off of the
internal laptop power lines (you will also need a +5V and -12
I have a house battery with a TAPR HPSDR LPU
< http://www.tapr.org/kits_lpu.html >
A little overkill, but it's quiet and a back
up supply for the ones in my Open HPSDRs.
Mike - AA8K
Pete Lancashire wrote:
Anyone running with a power supply with built in UPS ?
A long time ago (>15yrs) I di
In a message dated 01/06/2009 18:03:02 GMT Daylight Time,
p...@petelancashire.com writes:
Anyone running with a power supply with built in UPS ?
A long time ago (>15yrs) I did project that for a supply did
a/c line -> battery -> +5/+12/-12. A side advantage was great
isolation.
Hi there,
A switcher has much more stresses on the components, since it usually
switches the primary side rectified 110/220V high-voltage across a
transformer.
Thus the switching FET has to be very high voltage capable (about ~170V DC
in the US), and the second component under stress is t
In message <8ee95ff95a0d554a4605bc824e604fcc.squir...@petelancashire.com>, "Pet
e Lancashire" writes:
>Anyone running with a power supply with built in UPS ?
>
>A long time ago (>15yrs) I did project that for a supply did
>a/c line -> battery -> +5/+12/-12. A side advantage was great
>isolation.
m
Anyone running with a power supply with built in UPS ?
A long time ago (>15yrs) I did project that for a supply did
a/c line -> battery -> +5/+12/-12. A side advantage was great
isolation.
Can't remember the supply vendor tho' ...
-pete
> Joe and others
> I would recommend using a linear PSU,
phill...@btinternet.com said:
> I would recommend using a linear PSU, I have some made by a Company
> called Lascar (perhaps a different name in the States). These are not
> much larger than the Thunderbolt itself with a little more height.
> They have three separate VS./Rags, 5 volts and +15/-
Joe and others
I would recommend using a linear PSU, I have some made by a Company called
Lascar (perhaps a different name in the States). These are not much larger
than the Thunderbolt itself with a little more height. They have three
separate VS./Rags, 5 volts and +15/-15 volt supplies of suf
Ed Palmer wrote:
By the way, I had a message disappear a week or so ago. I wonder what's
going on?
I'm not aware of any issues with the mail list system, but incoming
messages do go through a spam and antivirus filter, so it's possible
that some messages get caught in that. The filtering s
Thanks for the info Bernd. This is exactly the type of data I was
hoping to get. I also have a 10544A that starts out about 1 - 1.5 KHz
low and it never made any sense to me because I thought it was an AT
xtal. Now I can check through my junk box oscillators and fill in some
blanks. Thanks!
Pete,
I have purchased units via the 'group buy' and directly from Bob Mokia
(fluke.l). One of the 'group buy' units, powered by the accompanying 'group
buy' power supply, died after being left on for a couple of days (as I
recall). I still have it disassembled in a box in line on my 'to do list
Gents,
I just bought a Z3805 (similar to Z3801/Z3816 but with some differences...)
from Chinese seller fluke.I.
1) Has anyone of you a link to a Z3805 manual? The Symmetricon pages have
not.
2) This beast is equipped with a MTI 260-0624-C DOCXO. The MTI pages do not
list the option "0624". Has a
I picked up a really nice one with 10811A at the Dayton Hamvention for
$125, which was probably too good to be repeatable. Last year a friend
picked up three non-working but repairable for <$100 each. Probably
anything under $250 for a working unit isn't a bad deal.
Also, don't underestimate
Bob
I bought the HP 5335A with missing power ON/OFF button (I'm still looking
for one to replace it), but otherwise it was in excellent order. This was
offered by a Military Surplus dealer in the UK, and I bought it for UK £102
(? US $150). Some of the "up-market" dealers are offering this mode
Bob Q skrev:
I'm thinking of buying an HP 5335A to upgrade from my old HP 5315A. I notice
prices on *Bay range from $100 (missing button on power switch) to $2100. Any
thoughts on what a fair price for one is?
Being a proud owner of a HP 5335A I would say that if you find a good
one in the
The CNS-II is very nice, but is more aligned with NTS applications than
precision frequency. Also by the time you add an OCXO the cost is well over
$2000. The Jackson Labs < http://www.jackson-labs.com/index.html > Fury or
Firefly would be a better comparison to the Thunderbolt. Said is a regul
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