Bob,
Have you tried to contact ESE for the information. In the past
they've always been pretty helpful on obsoleted goodies.
http://www.ese-web.com/
A bit of trivia... ESE originally stood for "El Segundo Enterprises".
Burt, K6OQK
Date: Wed, 28 May 2014 19:38:14 -0700 (PDT)
From: Bob Betts <[email protected]>
Subject: [time-nuts] ESE ES-180 WWV Receiver Schematic
Hi All:
This posting is not about splitting milli-seconds or other accuracy
stuff, but I need help and thought of?our time-nuts group.
At our Ham club we try to keep accurate time (think wall clock) for
logging certain tests, local and state emergency skeds and
coordination with other EmComm and ARES facilities. To that end, I
installed a?GPS receiver which was a more convenient upgrade from
the old Spectracom WWVB, 60 kHz clock and some other first efforts.
?http://bobsamerica.com/time3.html
?
We also acquired an ESE, ES-180 clock which decodes?data from any of
the?5 WWV HF broadcasts; 2.5, 5, 10, 15, 20 MHz. Okay fine. We have
3 clock reception options. Obviously, the GPS is the most
convenient, so good bye to the LF receiver.
?
However, over time, we have come to use the 5-band HF clock as a
propagation beacon. A quick scan of the 5 bands gives us a good
feeling of the HF band?propagation quality for a given time of day,
sun spot activity, season, weather condx and the highest MUF band
(max usable freq). This is a great tool that covers a big portion of
our allocated HF privilages, 160 thru 15 meters.
?
Sorry, this post is getting long.?Okay, so my point is that I?need
to find a schematic for the subject ESE clock. I need to make some
mods to the auto-scan circuits and do a (probably) overdue receiver
alignment. The ES-180 contains 2 PC Bd's; one for the display
drivers/7-segment encoders and the other is the receiver, scan
controller and data decoders. ESE had the schematic for the digital
board, but no archive material for the receiver section. I've been
searching the usual suspects, but no good fortune yet.
?
I realize that this topic?is a bit different than what we usually
discuss here, but if anyone could point me in the right direction
for this schematic, we'd really appreciate it.
?
Many thanks,
?
Bob, N1KPR
Burt I. Weiner Associates
Broadcast Technical Services
Glendale, California U.S.A.
[email protected]
www.biwa.cc
K6OQK
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