[time-nuts] ESE ES-180 WWV Receiver Schematic...

Burt I. Weiner biwa at att.net
Thu May 29 16:14:09 UTC 2014


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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