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 Post subject: Transistor?
PostPosted: Wed Nov 03, 2021 7:07 pm 

Joined: Mon May 03, 2021 8:33 am
Posts: 31
Do these have any value?
Some appear to have gold plating on legs and others don't.

Thanks
JJ


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 Post subject: Re: Transistor?
PostPosted: Thu Nov 04, 2021 2:31 pm 

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1138
Location: I'm right here :D
For the two Motorola on the right, this is the most info I could find from an old listing:
"For sale is a lot of six (6) Motorola PNP germanium power transistors used in the MOTRAC and MOTRAN radios. These parts came out of a couple of Motorola MOTRAC MHT series radios. The Motorola part number is # 48-124331which is a PNP transistor in a TO-3 case, these are the power inverter parts located on the sides of the radio"

That doesn't mean that yours are exactly the same but figure that could give you some info. If I have more time later I'll see if I can find anything on the others. I'm not sure what value Germanium has (may have to look that up later too).

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 Post subject: Re: Transistor?
PostPosted: Thu Nov 04, 2021 9:17 pm 

Joined: Sat Mar 21, 2015 11:15 am
Posts: 74
Location: Kitchener, Ontario Canada
Germanium is a chemical element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbors silicon and tin. Pure germanium is a semiconductor with an appearance similar to elemental silicon.


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 Post subject: Re: Transistor?
PostPosted: Thu Nov 04, 2021 10:08 pm 

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1138
Location: I'm right here :D
First on the left I found here:

https://www.electronicsurplus.com/motor ... p-n-2n2156

Also seems to be a germanium transistor. That link is New Old Surplus so maybe there's some resale value?

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 Post subject: Re: Transistor?
PostPosted: Thu Nov 04, 2021 10:22 pm 

Joined: Sat Nov 29, 2014 9:44 pm
Posts: 1138
Location: I'm right here :D
And finally the second from left:
"The 2N3055 is a silicon NPN Power Transistor intended for general purpose applications. It was introduced in the early 1960s using a hometaxial power transistor process, transitioned to an epitaxial base in the mid-1970s.

2N3055 is also used in audio power amplifiers. The device has good amplifying factor and also the gain is almost linear making 2N3055 one of best solution for power amplifiers..."

Now all this doesn't really answer what grade these could go as. The only similar thing I could find is here but Lost calls it a capacitor. And I feel like the link in that thread could be useful but I'm really not sure.

Hopefully all this info can help you or help someone help you more than me. D:

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