NT20 to TMP Octal socket cable pinout

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John Futter
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NT20 to TMP Octal socket cable pinout

Post by John Futter »

I've been asked by a member via private message as to the cable pinout as above
I have just buzzed one out with my multimeter 14 pin AMP CPC column on the right Octal socket on the left
assumptions are Looking at octal socket from the plug side with notch at 12 oclock pin 1 is on the right

Octal CPC
1 13
2 14
3 11
4 2
5 3
6 6
7 7
8 4

1 = cable shield
CPC has pins 5,9,10,12 not fitted
pin 8 is fitted but does not go anywhere
Jerry Biehler
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Re: NT20 to TMP Octal socket cable pinout

Post by Jerry Biehler »

Thank you!

-Jerry
Jerry Biehler
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Re: NT20 to TMP Octal socket cable pinout

Post by Jerry Biehler »

Pin 8 on the CPC seems unaccounted for, is there anything there? This pic from a cable shows a pin at 8
Screen Shot 2021-08-07 at 6.10.43 PM.png
Jerry Biehler
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Re: NT20 to TMP Octal socket cable pinout

Post by Jerry Biehler »

I got a cable made up according to John's pinouts and its working. One note, the actually PIN number for an octal base are the opposite from what John stated if you do have a octal base with pin markings. It goes counterclockwise from left of the key looking at the face with holes where the pins go.

So the pinout would be:
Octal CPC
8 13
7 14
6 11
5. 2
4 3
3 6
2 7
1 4
electronsandstuff
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Re: NT20 to TMP Octal socket cable pinout

Post by electronsandstuff »

Thanks John and Jerry! I have a turbovac 151 coming with a broken cable (and for the wrong controller) and was searching for exactly this pinout for the NT20.
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