I've been talking with Doug to better understand why his Spectracom WWVB
receiver shows the green lock indicator. This receiver should not work given
the enhanced WWVB modulation we've had since 2012. Fortunately he has chosen
not to touch anything while we ponder this.
Meanwhile I pulled out some Spectracom gear (8164) and was able to repro his
green lock! But the 10 MHz output is very unstable so I'm pretty sure it is not
locking at all. Looking at the schematic the green indicator seems primitive.
So "lock" may not really mean it has robustly locked to the carrier. More
details to follow.
If any of you have Spectracom WWVB 816x or 817x receivers you might want to try
----- Original Message -----
From: "Martin VE3OAT" <ve3...@storm.ca>
Cc: "Doug Millar" <drzarko...@yahoo.com>
Sent: Thursday, April 12, 2018 5:12 PM
Subject: Re: [time-nuts] WWVB information
> Hi, Doug,
> How is your 8161 doing now? Still synced properly? Should I bring my
> 8164 up from the basement? I was so disappointed when WWVB changed
> their modulation. Thanks for any encouragement.
> ... Martin VE3OAT
> On Wed, 11 Apr 2018 16:28:41 Doug Millar wrote :
> > Hi, My Spectracom 8161 comparator and 8171A clock are chugging
> > right along in sync with the proper time. I have only looked at
> > the digital LED output and it is within one second of my other
> > WWVB clocks. Seems like magic. It came in synch about two
> > weeks ago and stayed there. I haven't changed anything in my
> > lab or moved the units. Antenna is still the same.
> > Pictures available. Doug K6JEY
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