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69.49.200.115
Hi Guys! Hopefully someone can help me out here. I have a large quantity of these but I don't know what they are. Any help would be appreciated. They are all the same and each says "6977 Holland". Are they a very tiny tube or a bulb of some sort? The glass is about an inch long and each has 4 wires. Thanks! Bernie
Follow Ups:
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David Aiken
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Thanks for the info guys! It is much appreciated.
I googled 6977 tube holland and found this:
Scarcer is the DM160, also called 6977. This is my
candidate for the world's smallest glass electronic tube--barely 3/4" long
and as wide as two matchsticks. Philips, and their US division Amperex,
tried to market the 6977 in the late 1960s as a logic monitor for digital
computers. Unfortunately some radio collectors have found that it can be
substituted for01As in radios, by soldering it into a 4-pin UX base. It makes a very nice
low-mu triode. Supplies of the 6977 are expected to dry up quickly. There
was a DM21, a large device with an octal base and a 2-bladed round eye. It
had a low-power filament like the other DMs, for use on 1.5v battery power.
and a link below w/ pin outs
Thanks much for that info. So they are tubes afterall. Well I think I have about a hundred of these, too many to count.
Many people missed an obvious tube in their every day life, TV picture TUBE.
Sorta funny.
They never saw the light.
Bob
I don't understand your people.
So, to you I will put and end.
And you'll never hear surf music again!
Put them on ebay you might be able to retire
So it goes.........
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