On 14 Nov 2016 03:11:36 GMT, "DoN. Nichols"
wrote:

On 2016-11-13, Larry Jaques wrote:
On 13 Nov 2016 01:13:11 GMT, "DoN. Nichols"
wrote:

On 2016-11-12, Larry Jaques wrote:
On Sat, 12 Nov 2016 05:23:55 -0500, "Michael A. Terrell"

Mikey or Don wrote:

An example, from the start of the sequence is blue and white,
typically blue with a white stripe and white with a blue stripe as the
other half of the pair. Keep using blue through the other four pair of
that group, then increment blue to the next color and repeat the
sequence of the other color in the pairs. So each color pair identifies
both wires of the pair as belonging together.

I'm sure that helps immensely when you're faced with 50-500 wires in a
group.

Well ... 25-pair cables *are* 50 wires, and the dots on solid
uniquely marked each wire in that count. (Aside from that, the two wires
in a pair were also twisted -- to minimize crosstalk to adjacent pairs.)
The twisting helps keep them together so you don't have to search
through 49 other wires to find the other half of a pair. :-)

Quite handy, that.


Ah -- SubCycle -- put in 60 Hz, get out 20 Hz by some magic
inductive circuit. Used for ringing the phone bells. (Except the other
frequency bells used on some party-line systems, in addition to ringing
between one wire of the pair and earth ground. :-)

I was playing with the phone line wires once when a call came in.
Yeouch! Weren't those 90vac@20Hz? Surprised me.

Yep -- 80=90 VAC 20 Hz (or 20 CPS in the old days. :-)

Yeah, I grew up with Cycles Per Second, too.


As for the drive-in speakers -- I wonder how many were uprooted
by driving off with them still in the window over the life of the
theater? :-)

Probably more than the number of gasoline pump hoses ripped out of
their pumps. g

Some likely stats: 1/2 had their speaker cable ripped out, 1/4 of the
speakers broke the window out, and 1/4 of the posts were uprooted.


Fond old
memories of drive-ins, I remember borrowing Mom's '62 Lincoln
Continental, complete with suicide doors, to go to the drive-in after
I got my license. The front electric seat would to back, down, and
tilt back so we could put our feet on the dashboard to watch. Then,
when the movie got boring and my girlfriend got friendly, the cushy
seats proved long and wide. sweet sigh

I didn't have wheels back then -- or a MGA, which really did not
have the creature comforts for properly enjoying a drive-in. :-)

A friend drove us to work in a floor-holey MGTD one winter. Granted,
SoCal ain't frozen tundra, but it was a mite chilly. I wouldn't have
considered it a model car for the drive-in, either, despite the vast
advances and upgrades from your MGA.

--
If government were a product,
selling it would be illegal.
--P.J. O'Rourke