IDK why but I've wanted some of these for a while and finally found some...

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Bill Notfaded

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Aug 28, 2019, 1:26:19 PM8/28/19
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The venerable NL-5866SX...

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NL5866SX.jpg

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It's really all just about the spiral though... I'm not even sure what the symbol is for to be honest but I've rarely seen it a few times and just happy to have a couple NOS finally.


Regards,


Bill







Paul Andrews

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Aug 28, 2019, 3:16:10 PM8/28/19
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I knew I had seen this somewhere, but it took me a while to find it:

https://mirror.thelifeofkenneth.com/lib/electronics_archive/MullardTubesSpecialProducts1972-73_text.pdf. Search for ZM1263, you will find this:

ZM1263 In line, side-viewing indication Incorporates a red filter Characters —, +, ~, * 10-5 170 140 2-5 Flying Lead '

* This is a symbol shaped like a Catherine-wheel on type ZM1263 that may be used for special indications, e.g. fault condition.

Paul Andrews

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Aug 28, 2019, 3:20:14 PM8/28/19
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And now I have found that it was the ZM1263, I have found several other references:


The ZM1263 is a side - viewing tube that contains symbols for alternating (N), plus (+), mines (-) and a fourth symbol, consisting of a spiral of two and a quarter turns for `equipment failed' or anything else that has no con- ventional symbol. 

On Wednesday, August 28, 2019 at 1:26:19 PM UTC-4, Bill Notfaded wrote:

Dekatron42

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Aug 28, 2019, 3:49:10 PM8/28/19
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The Fluke 8200a multimeter use one of these Nixies, have a look here: https://pmanning.smugmug.com/Electronics/Fluke-8200A-Digital-Voltmeter/i-BfbMSdG

/Martin

Bill Notfaded

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Aug 28, 2019, 4:09:36 PM8/28/19
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That's awesome Paul... I knew you guys would recognize it somehow!

R,

Bill

Paul Andrews

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Aug 28, 2019, 5:10:52 PM8/28/19
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So if someone has the manual for that, we can see what they used it for.

Mac Doktor

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Aug 28, 2019, 5:34:58 PM8/28/19
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A friend of mine told me that he'd seen the spiral symbol used on a gas chromatograph to indicate that the oven was warming up.


> On Aug 28, 2019, at 5:10 PM, Paul Andrews <pa...@nixies.us> wrote:
>
> So if someone has the manual for that, we can see what they used it for.


I have the manual for the 8300A and two units. Both of them have badly worn tubes. There's so much metal on the inside on the inside of the lesser significant digits that you can't even read them. I could slap together a single working unit but none of the tubes would be the same brightness. Somebody must have left them turned on for ages.


Terry Bowman, KA4HJH
"The Mac Doctor"

Bill Notfaded

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Sep 2, 2019, 1:35:32 PM9/2/19
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So pics quick of the new tubes!  I always wanted the spirals!  😁😁😁

Bill
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