🚀 go-pugleaf

Thanks to all who answered my previous query about how to set up
without a reference clock.  I got a few different alternative ways to
do the job and I'm still trying to decide which one I like best.  I
now have xntp.

Anyway, one person mentioned that it is trivial to build a CHU clock
with a shortwave and an old 300 baud acoustic modem.  However, ignorant
as I am when it comes to hardware and radio, I wouldn't know how to do
this.  Also, I don't know how much it would cost.  I might consider
getting a reference clock if I could get one cheaply.  I'm pretty sure
I could scare up an acoustic coupler somewhere.  I'd have to buy a
radio and antenna though.  It seems to me that this would be good
information to include with the source.  refclock_chu.c briefly
mentions a little bit but it's still not enough detail for me.  I
looked for a write-up on this on louie.udel.edu but I couldn't find
one.

The only clock I've found is the Heath GC-1000 Most Accurate Clock at
$399.  This is far more than I can come up with for this.  The latest
clock.txt off of louie.udel.edu (dated 3/31/91) says it's $350.
The Spring 1991 Home Automation by Heath catalog says it's $399.  I
am curious as to why clock.txt says "It is supported (reluctantly) in
the Fuzzball operating system."  Why no UNIX capability?  This is
by far the cheapest one listed.  What's wrong with it?

The documentation for xntp only talks about the PST, Spectracom 8170
and CHU clocks.  However, include/ntp.h shows HEATH, and two GOES
clocks as well.  The source seems to indicate that these are not
supported by the software.  Why?

I'd like any information about how to set up a reference clock
cheaply.  Why are radio clocks with serial interfaces so expensive?

--Bill Davidson (billd@fps.com)