Yes, I have some magneto [wooden and beakelite] phones too. [And a lovely
tech's intstrument circuits book dated 1914 when they 'rationalised' the
system here.]
After all the time-base talk re the grid and at other times [atomic] I
thought that I had better determine whether the current posters had taken
off their Nixie-clock-foible hats :-)) .
The ringer I mentioned has several sets of cam/contact for specific ring
styles too.
[Dad was telephone guy and was twice given the honour of making the last
call from a closing exchange as part of the 'ceremony'. Still got the
'gold' phone and the 'gold-painted bi-directional selector' given as
memento.
John K.
----- Original Message -----
From: "threeneurons" <threeneur...@yahoo.com>
To: "neonixie-l" <neonixie-l@googlegroups.com>
Sent: Saturday, July 02, 2011 11:56 AM
Subject: [neonixie-l] Re: US power grid frequency tests.
> Er, are we being sloppy here rounding 17 to 20? Or do the weirder
> countries
> [ie not Australia :-)) ] use 20 ? I thought it was bad enough rounding
> 16
> 2/3 [16 and two thirds] to 17 !
Just remember the origins of the 1st ring generators:
http://www.flickr.com/photos/34878756@N04/5559552293/
http://www.flickr.com/photos/34878756@N04/5559593001/
You cranked them by hand. Frequency and voltage regulation might be a
bit iffy.
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