[GreenKeys] Given that energy can be neither created or destroyed ...

[Don Robert House]

Thanks Jim

A keeper...
Don

On 1 Dec 2008, at 10:28 PM, jhhaynes at earthlink.net wrote:

I'll agree with the others that the distortion caused by inductance is
likely to be the limiting factor rather than the voltage and current
and resistance.  And how much it matters depends on how good the signal
is to begin with.  And what speed you are running.  And I don't know any
concrete numbers; you'll just have to try it.  Ordinarily around the
home you are likely to have only a couple of printers in line, and maybe
a typing reperforator for each, for a total of four magnets.

In the test area at Teletype Corp. they once had a bunch of vacuum tube
keyers for testing a lot of machines at once.  That is, you key each TTY
loop with a tube like a 6Y6, and then you can feed the grids from the
signal source and you can have as many as you want.

I designed some stuff in the early 1960s along the same lines, using a
tube for each machine.  Later translated the design to solid state.
You can use sort of a modified RS-232 scheme in which one signal source
can drive a whole lot of receivers.


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