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Old 06-20-2018, 09:46 PM
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Electronic M Electronic M is online now
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WTB: oddball 3-prong power cord that fits Heathkit and others.

Some years ago I bought an unusual S-C color monitor (that I've got working). It did not come with the cord which is apparently not a very common item these days. After IBM cords and the fatter pin, bigger plug incompatible lookalike failed I figured I'd never find one that fits (what I need has closer spaced pins and a smaller plug). Several years later I've finally found a match the only catch is it is on a Heathkit IM-102 Nixie based DMM that I'd also like to keep/use....I'd prefer to obtain a second such cord instead of selling the IM-102 or hacking another connector on. Heathkit part number in the book is 89-30 if that helps anyone.

Here is the connector in question.
What I need


And a rare comparison with the similar incompatible ones for the curious.
IBM and non-IBM power cords


Anyone have one or know where I can get another one?
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Old 06-20-2018, 10:42 PM
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I wonder if this is the same as on some old HP lab gear, like an audio oscillator or function generator.
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Old 06-21-2018, 10:16 AM
dieseljeep dieseljeep is offline
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Quote:
Originally Posted by old_tv_nut View Post
I wonder if this is the same as on some old HP lab gear, like an audio oscillator or function generator.
Those were referred as a business machine power cord. In common use before the IEC connector became standard.
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Old 06-23-2018, 01:53 PM
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init4fun init4fun is offline
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Quote:
Originally Posted by dieseljeep View Post
Those were referred as a business machine power cord. In common use before the IEC connector became standard.

Yep , i remember seeing those on electric typewriters and adding machines , as well as electric (not electronic) cash registers back in the day .

Could a sewing machine also have the same plug ?
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Old 06-24-2018, 08:25 AM
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Jon A. Jon A. is offline
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Man, this keeps getting weirder. I have two that are more or less rectangular like the first plug but all pins are the same size. I can't keep my JVC U-Matic powered up with either of them, they don't grip the pins well.
Quote:
Originally Posted by old_tv_nut View Post
I wonder if this is the same as on some old HP lab gear, like an audio oscillator or function generator.
I recently picked up a free HP 652A that has an IEC connector. No idea if it's a retrofit or not.
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Originally Posted by init4fun View Post
Could a sewing machine also have the same plug ?
I've seen similar cords advertised as being for sewing machines.
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Old 06-24-2018, 09:04 PM
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N2IXK N2IXK is offline
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Just to add confusion to the situation, there are 2 different standards in how those "business machine cords" are wired, which swap the positions of hot and neutral.
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