Off Topic, Part ID..no neon!

[orange_glow_fan]

I think it's an NPN transistor but not sure. I can only test one junction (B-C) and even that is reading higher than seems normal.  I'm going by the board markings and am not sure of the actual basing. The board is from a Seth Thomas, Acquisition Clock that dates from around 1972 or so...

Thanks for looking..

Kerry

[orange_glow_fan]

This is a picture of the 'works'...

[gregebert]

I took a similar one apart many years ago (battery-powered kitchen clock died after 10+ years of use), and in the process of doing that, I destroyed the spring.

What I ended-up with was a peculiar motor.

I believe the motor works by inducing a small current from the magnet into the coil, and in-turn the transistor causes a larger current to kick the magnet harder. When the spring was in-place, it oscillated. Without the spring, it sped-up.

[John Rehwinkel]

> I think it's an NPN transistor but not sure. I can only test one junction (B-C) and even that is reading higher than seems normal. I'm going by the board markings and am not sure of the actual basing. The board is from a Seth Thomas, Acquisition Clock that dates from around 1972 or so...

That looks like a "Macro-T" package, if that helps. You might be able to replace it with something like a BFR96.

- John

[John Rehwinkel]

On Jan 1, 2018, at 9:29 PM, John Rehwinkel <jre...@mac.com> wrote:

I think it's an NPN transistor but not sure. I can only test one junction (B-C) and even that is reading higher than seems normal.  I'm going by the board markings and am not sure of the actual basing. The board is from a Seth Thomas, Acquisition Clock that dates from around  1972 or so...

That looks like a "Macro-T" package, if that helps.  You might be able to replace it with something like a BFR96.

Another possibility is an MMT918, which is available surplus:

http://www.goldmine-elec-products.com/prodinfo.asp?number=A20522

- John