On Thu, 13 Feb 2014 09:12:17 +1000, "David Eather"
wrote:
On Thu, 13 Feb 2014 00:05:22 +1000, Jim Thompson
wrote:
On Wed, 12 Feb 2014 06:49:10 -0500, JW wrote:
On Tue, 11 Feb 2014 20:03:34 -0700 Jim Thompson
wrote in Message id:
:
On Tue, 11 Feb 2014 19:48:19 -0800, josephkk
wrote:
On Mon, 10 Feb 2014 00:11:40 -0800, Kevin McMurtrie
wrote:
In article ,
John Fields wrote:
begin 644 Hand calcs0003.pdf
LOL! Isn't that one of the early "150 in one" finger shocker
circuits
that didn't work.
The transformer saturates before the relay engages. If the 1.5V
battery
can overcome the transformer's current, it turns into a little arc
lamp
because the voltage rises too fast for the contacts to open.
There are a few working variations of the relay transformer driver.
It's how tubes were driven from batteries in the old days. (Hint:
add a
capacitor)
I had the occasion to work on vibrator power supply radios a few
times.
They did some strange things in those.
?-)
Not a good thing when you're a teenager parking in lover's lane...
Who needs a vibrator in lover's lane? 
:-D
The audio section of that radio took up a good portion of the trunk.
...Jim Thompson
50 years ago if you reminisced about a vibrator power supply everyone knew
exactly what you were talking about. In a few more years you won't be able
to mention it in polite company without first giving a detailed
description first - and even then some people will still think you are
being obscene . Ahh, the wonders of progress.
Indeed. Some here would be astonished that some vibrator packs didn't
need rectifiers, they had synchronous output reeds.
...Jim Thompson
--
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