Rex wrote:
I just received a Lucent RFG-RB (no -m- in this one) rubidium unit eBay
buy from the lady in Atlanta. Thought I'd share a few notes on what it
is. Maybe some of this has already been covered -- I lost track of all
the emails.
Like John, I immediately opened it up, haven't tried it
On Thu, 28 Dec 2006 21:49:59 +1300, Dr Bruce Griffiths
[EMAIL PROTECTED] wrote:
Rex wrote:
The 15 MHz generation looks very similar to the other boad I described
in another message on an FRS-C unit. The active source again seems to
come from an Altera PLD. Maybe it divides 10 MHz by two, and
Hello Time Nuts,
For private matters I will stop my hobby at the frequency field.
I think to sell my instruments if any is interested,
I can put it on ebay or sell direct. The equipment I have is;
HP5061 (not working HV 2.5 kV defective condition of the high
Performance tube is unknown),
In message [EMAIL PROTECTED], Gerald Molenkamp writes:
After some reverse engineering of the BSC, I never understood the
reason for the REG-M-XO in the BSC as it required a 10 MHz input
from the RG for it to operate properly, e.g. the fault LED off. [...]
The XO may simply be there to be able to
Thanks for the information, Gerald.
Could the fault light without 10MHz input be as simple as the system
reporting failure of the Rb? i.e., the XO unit working OK, but just
reporting that the system wasn't operating properly.
Like you, I'm having trouble sussing out just why this thing is
On Thu, 28 Dec 2006 08:51:24 -0500, John Ackermann N8UR [EMAIL PROTECTED]
wrote:
Thanks for the information, Gerald.
Could the fault light without 10MHz input be as simple as the system
reporting failure of the Rb? i.e., the XO unit working OK, but just
reporting that the system wasn't
Have ebay acquired a used HP10544A attached to a PC card HP 05328-20027.
Plan to use it as an osc upgrade for a lest than perfect HP105B.
Anyone have schematic, pinouts, function, etc of the card?
Thanks
LesK1YCM M0YCM
M0YCM/6Y5
Pictures
From what I have read, the RB acts as the primary once it has warmed up and
locked, and the XO goes into 'standby'. But if something happens to the RB
then the XO switches to the primary.
Still waiting for Lucent to verify my account. I guess it wouldn't hurt for
someone else to register on their
In message [EMAIL PROTECTED], Rex writes:
I agree. The more I learn about the system, the odder it seems. Before
looking at the RB, I would have guessed that the XO unit, with GPS,
would have been disciplining the Rb to use in hold-over. In the RB, I
don't see any signs of a connection to the
Has anyone received the results of the ARRL FMT yet.
Connie
K5CM
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Yes, but was hoping someone might have the frequencies since it's after the
deadline. I will check with Joe at the league and see if he will post the
frequencies or make us wait till the letters come out hi hi.
Connie
-Original Message-
From: Carl Walker [mailto:[EMAIL PROTECTED]
Sent:
Back when these Lucent units were first appearing GPS had not yet been
implemented at the cell sites here in Alaska. The rubidium was too noisy for
direct frequency synthesis, so the XO unit was phase locked to the rubidium
to provide the long-term stability needed, and the XO output was
Here are the W1AW FMT Numbers I just received from Joe, NJ1Q (W1AW Station
Manager)
160m - 1854317.5 Hz
80m - 3587117.5
40m - 7038804.9 Hz
My copy of W1AW:
160M 1854317.77 Hz
80M 3587117.95 Hz
40M 7038806.03 Hz
I missed the 40m W1AW frequency by 1 Hz for some reason Hmm.. I
I'm sure Lucent engineers spent quite a bit of effort designing that metal
box to keep the rubidium temperature as low as possible for extended life.
If the rubidium is used in a different enclosure pay special attention to
thermal
conditions as the life of the rubidium is reduced with increasing
Bjorn and I have a little project going where we use the CNC Allstar
receivers.
They have the specific feature that their referens XO is at 10 MHz. This
will
make it very easy to drop in a suitable oscillator. As it happends I see
that a
FTS1200 and an Allstar receiver has showed up in my main
Here is the WA6ZTY tx frequency:
40 Meters - 7028351.47 Hz
My reading:
7028351.54 Hz
I'm only off by .07 Hz here, so I feel my system was calibrated OK. Not yet
sure why my reading on W1AW 40m was so far off (1 Hz).
Connie
K5CM
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Hi all,
Thanks for all of the very helpful responses, links and advice. I'm very
sorry that I couldn't participate in the discussion at the time but I was a
bit under resourced on e-mail facilities during the festive season.
The trend that I noted from your replies is that the different
On Thu, December 28, 2006 21:59, Jason Rabel said:
Bjorn and I have a little project going where we use the CNC Allstar
receivers.
They have the specific feature that their referens XO is at 10 MHz. This
will
make it very easy to drop in a suitable oscillator. As it happends I see
that a
Bill Tracey said the following on 12/28/2006 06:41 PM:
I too got a 1hz high error on W1AW on 40. As I recall, the data had a
double peak in it - think I picked the stronger peak which apparently was
the wrong one. Apparently the propagation on 40 was interesting when the
test was run.
Hi Bill,
Several others have now said they were off by 1 Hz on 40m. Possibly Joe (
W1AW Station manager) typed the frequency wrong to my email, or W1AW
measured the freq incorrectly that night or as John mentioned there was a
artifact from the transmitter, or the Doppler was indeed that bad. I
Interesting!
My numbers:
160: 1854317.9
80: 3587117.6
40: 7308806.0
Henry
KB7NIE
On 12/28/06, Connie Marshall [EMAIL PROTECTED] wrote:
Hi Bill,
Several others have now said they were off by 1 Hz on 40m. Possibly Joe (
W1AW Station manager) typed the frequency wrong to my email, or W1AW
Hey Henry Looks like your W1AW 40m numbers are in line with the others.
I just checked my audio wave file with spectran, and the 40 meter signal was
strong and stable. Joe (W1AW station manager)said he would post the results
to the W1AW/FMT website soon, so we will wait and see if it is the
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