j...@febo.com said:
> The modular cable connecting the receiver to the decoder is wired straight
> through, not reversed as most telephone cables are. My fear is that
> someone (like me) might at one point have used a reverse cable and thus put
> reverse polarity on the board; I don't see any
Hi Brooke --
Yes, all the chips on the board are low power devices. I'm measuring
the receiver as drawing 0.9 MA at about 2.3 volts.
Update -- I moved the receiver and farted around with the wiring, and
now the S-Meter is off the peg, responds to orientation changes, and I
actually got a co
Hi John:
The U4226B chip operates at very high impedance levels in order to minimize battery drain in its main application,
battery powered clocks.
So some sort of buffer is needed on all the output pins.
The 333 model, with the analog meter, was made for the folks working for WWVB as a way fo
On 03/30/2018 03:39 AM, Hal Murray wrote:
t...@leapsecond.com said:
I updated http://leapsecond.com/museum/ulio/ with more manuals, and many
exterior / interior photos of the 301 module.
Thanks. My 301 says it is a 30TH Rev-A - mostly through hole parts. Same
layout.
Mine is the same. Cir
t...@leapsecond.com said:
> I updated http://leapsecond.com/museum/ulio/ with more manuals, and many
> exterior / interior photos of the 301 module.
Thanks. My 301 says it is a 30TH Rev-A - mostly through hole parts. Same
layout.
--
These are my opinions. I hate spam.
__
> I have a 333 box with 301 antenna. It was a gift several years ago. The
> display updates, but the meter never gets off 0. At the time, I thought the
> new modulation scheme had killed it and didn't investigate. But tvb
> suggested it should still work, so I took the cover off.
Hal,
I te
Subject: Re: [time-nuts] Ultralink WWVB receiver manuals?
Thanks to another list memo, I got the basic manual. Got it fired up and while
it does things, I think there's a problem. The S Meter is pinned all the way
over to the right (very, very strong signal) and stays there no matter
> It would be very nice to have a direct NIST time source in the lab
> again, complete with PPS output.
If you have a 1200/9600 baud modem and a land line, 303.494.4774 is also a
reliable backup source of NIST time.
https://www.nist.gov/pml/time-and-frequency-division/services/automated-compute
Thanks to another list memo, I got the basic manual. Got it fired up
and while it does things, I think there's a problem. The S Meter is
pinned all the way over to the right (very, very strong signal) and
stays there no matter how I shield the antenna. And I never see any
decoded bits. I ho
>From info for a 332A, YMMV, etc...
> (a) is the 6P6C modular cable
> connecting the receiver and decoder straight, or reversed
Receiver/decoder cable RJ11-4/6 wired pin 1 to pin 1 - 500
feet maximum length
> (b) what are the four DIP switches on the back of the 333 used
Congrats on your acquisition. The Ultralink WWVB receivers are very nice. It
should still work -- it's an AM subcode (not carrier phase) receiver. If you
have more questions let me know. These modules were the darling of precise time
at the turn of the century; before mobile phones, before GPS w
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