[GreenKeys] Fwd: Re: Frequency deviations in Continental Europe including impact on electric clocks steered by frequency

[Charles]

Reminds me of my first EE job in the early '80's... small defense contractor 
in the D.C. area doing a sonobuoy project for the Navy.
We drove up to Warminster PA where there was a former rock quarry full of 
very deep, very quiet water to test our sensitive hydrophones.
With an FFT analyzer hooked up to the incoming signal it was strange to see 
not only the ubiquitous 60 Hz and several harmonics above the noise floor, 
but also 25 Hz and its harmonics!
The people stationed there explained that the railroad tracks running nearby 
were powered from 25 Hz :)
-Charles
WB3JOK/0 since '76
ps I just looked it up and that base was closed in '96.


-----Original Message----- 
From: Doug Alderdice
Sent: Tuesday, March 06, 2018 8:47 PM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Fwd: Re: Frequency deviations in Continental Europe 
including impact on electric clocks steered by frequency



On 3/6/2018 9:10 PM, Bruce Gentry wrote:
>    National Greed finally ended all  25 cycle service in Buffalo around 
> 2000.

Actually, I believe Buffalo had 25 cycle service a little later than
that because it continued to be generated at the Adam Beck power station
on the Canadian side of the Niagara River for a few more years and
supplied customers on both sides of the river.  A friend's workplace was
replacing its power feeds in the early 2000s and they were installing
drops and meters and etc. for both 60 Hz and 25 Hz services as they had
equipment that used both and they were still getting 25 Hz off the line
from Canada.  It was a few years after that when it was announced that
they were discontinuing 25 Hz service from the Beck station.

Doug, KA2WFT
Buffalo

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