Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

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RE: What do I Have Here?

Posted by Awe-d-o-file (D) on March 10, 2008 at 16:15:36

In Reply to: What do I Have Here? posted by EVGuy on March 10, 2008 at 16:01:03:

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

• 6977   (Open in New Window)

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