[time-nuts] ESE ES-180 WWV Receiver Schematic...
paulswedb at gmail.com
Thu May 29 17:32:26 UTC 2014
Now thats the tidbit of the day.
I remember their clocks and as I recall timecode readers I think.
I only knew them as ESE in the television business.
On Thu, May 29, 2014 at 12:14 PM, Burt I. Weiner <biwa at att.net> wrote:
> Have you tried to contact ESE for the information. In the past they've
> always been pretty helpful on obsoleted goodies.
> 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 <rwbetts at sbcglobal.net>
>> 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.
>> 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.
> biwa at att.net
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