I just acquired an Ultralink WWVB timecode receiver -- more specifically, model 301 receiver and model 333 decoder. I'm looking for documentation on these guys. Anyone have a manual they'd be willing to share? The key questions are really just two: (a) is the 6P6C modular cable connecting the receiver and decoder straight, or reversed, and (b) what are the four DIP switches on the back of the 333 used for? Thanks for any info. John

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 was affordable. Ultralink discontinued the product line within a few years when the market for WWVB-based timing dried up. Manuals here: http://leapsecond.com/museum/ulio/ Good question on the cable. If you don't see it in the manual let me know; I'll dig out my cable and have a look. Note the inner 4 of 6 pins are Vcc, TCO, AGC, gnd. /tvb ----- Original Message ----- From: "John Ackermann N8UR" <jra@febo.com> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Thursday, March 29, 2018 8:57 AM Subject: [time-nuts] Ultralink WWVB receiver manuals? > I just acquired an Ultralink WWVB timecode receiver -- more > specifically, model 301 receiver and model 333 decoder. > > I'm looking for documentation on these guys. Anyone have a manual > they'd be willing to share? > > The key questions are really just two: (a) is the 6P6C modular cable > connecting the receiver and decoder straight, or reversed, and (b) what > are the four DIP switches on the back of the 333 used for? > > Thanks for any info. > > John > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

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 hope the receiver chip (U4226B, unobtanium except from China) isn't shot. Will do more testing when I get some cycles free. It would be very nice to have a direct NIST time source in the lab again, complete with PPS output. Thanks! John ---- On 03/29/2018 05:55 PM, Tom Van Baak wrote: > 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 was affordable. Ultralink discontinued the product line within a few years when the market for WWVB-based timing dried up. > > Manuals here: http://leapsecond.com/museum/ulio/ > > Good question on the cable. If you don't see it in the manual let me know; I'll dig out my cable and have a look. Note the inner 4 of 6 pins are Vcc, TCO, AGC, gnd. > > /tvb > > ----- Original Message ----- > From: "John Ackermann N8UR" <jra@febo.com> > To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> > Sent: Thursday, March 29, 2018 8:57 AM > Subject: [time-nuts] Ultralink WWVB receiver manuals? > > >> I just acquired an Ultralink WWVB timecode receiver -- more >> specifically, model 301 receiver and model 333 decoder. >> >> I'm looking for documentation on these guys. Anyone have a manual >> they'd be willing to share? >> >> The key questions are really just two: (a) is the 6P6C modular cable >> connecting the receiver and decoder straight, or reversed, and (b) what >> are the four DIP switches on the back of the 333 used for? >> >> Thanks for any info. >> >> John >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >

> 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-computer-time-service-acts /tvb

It appears that UTSource has the U4226B in stock under several manufacturers, including Atmel. https://www.utsource.net/sch/U4226B Donald Resor N6KAW -----Original Message----- From: time-nuts <time-nuts-bounces@febo.com> On Behalf Of John Ackermann N8UR Sent: Thursday, March 29, 2018 4:12 PM To: time-nuts@febo.com 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 how I shield the antenna. And I never see any decoded bits. I hope the receiver chip (U4226B, unobtanium except from China) isn't shot.