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From: john larkin <jl@glen--canyon.com>
Newsgroups: sci.electronics.design
Subject: Re: Circuit Symbol
Date: Thu, 19 Dec 2024 15:46:46 -0800
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On Thu, 19 Dec 2024 22:39:51 -0000 (UTC), Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>john larkin <jl@glen--canyon.com> wrote:
>> On Thu, 19 Dec 2024 20:38:33 -0000 (UTC), Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>> 
>>> john larkin <JL@gct.com> wrote:
>>>> On Thu, 19 Dec 2024 09:09:54 -0600, Dennis <dennis@none.none> wrote:
>>>> 
>>>>> On 12/18/24 21:20, john larkin wrote:
>>>>> 
>>>>>> 
>>>>>> I vaguely recall that they oscillated at somethig over 100 Hz. I
>>>>>> powered an old car radio with 60 Hz instead of the vibrator, and the
>>>>>> radio's step-up transformer ran hot.
>>>>>> 
>>>>> They ran at a frequency as high as reasonable for a mechanical device. 
>>>>> This allowed for a smaller transformer.
>>>> 
>>>> Vibrating contacts were the first switching regulators. Auto
>>>> generators - before alternators - used a hysteretic oscillating
>>>> contact closure to drive the field coil. That was very efficient and
>>>> not especially reliable.
>>>> 
>>>> 
>>> 
>>> Especially when made by Lucas. 
>>> 
>>> Cheers 
>>> 
>>> Phil Hobbs 
>> 
>> The brits traditionallty split their motorcycle crankcases vertically,
>> to maximize oil leakage through the gaskets.
>> 
>> Those dumb Japanese, Honda and Kawasaki, split their crankcases
>> horizontally, which required us to change the oil, not just add it.
>> 
>> 
>
>Everything designed in Britain in the 1960s was legally required to leak
>oil. That includes the Concorde and the QE II. 
>
>I suspect Shell was at the bottom of it. 
>
>Cheers 
>
>Phil Hobbs 

I rode the QE2 from NYC to France once. I had scheduled an engine room
tour but that was canceled because they'd had a fire. Our trip took an
extra day too, limping along.

Never rode the Concorde, which is just as well.