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Posted by Al Gillis on March 18, 2006, 11:52 am
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Well, this is a pretty tall order! But it sounds interesting... Sort of
like diagnosing the Apollo 13 situation but without looking at the books!
Do you have any close up and detailed photos of the "Computer"? Did this
gizmo work on 110vac (a wall outlet) or did it have a battery? Were there
only two wires connected to the dial? How about the lamps? Would you
recognize them as typical key set lights (#51A, I think) or were they some
sort of switchboard lamp (or would you know)? Any other switches on the
"computer" front panel. Do you recall what happened when you operated the
dial? (That is did certain lamps flash? Did a lamp light corresponding to
the number you dialed?) Any noisemakers associated with this? (that is,
bells, buzzers or the like)
Let us know!
Al
>I have an old home made "test system" that was made by my father, a
> test set designer for Western Electric PBX, in about 1969. It was
> given to me for Christmas and was called a "Computer". I now have
> a 5 year old son and he wants me to get this working again.
>
> The first problem I am having is that I was a real boy and took it
> apart and lost some of the wires, and broke off some of the connections
> when I was young.
>
> The second problem is that my father pasted away 3 years ago and we did
> not fix it before he got sick.
>
> The third is that I have not worked on circuits for far to many years.
>
> What this did was when the dial was turned it would light one of 10
> lights across the top.
>
> The test system has a 45 volt battery a western electric dial and a
> circuit board. The circuit board has 10 identical components. It
> looks like a resistor, to a transistor from there to a capacitor then
> to a diode and then to another capacitor. The first lights ground is
> hooked to all the other lights and to the dial on the Y terminal then
> the other side of the light is connected to the circuit. The BK
> terminal looks to go to the start of the circuit board. The BB
> terminal looks like there was a wire there, but none are connected. I
> can not find where the power should be connected, or where the ground
> should be connected.
>
> Please help me, my Son is driving me nuts and I can not believe I broke
> this and never asked for help to fix it.
>
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