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Germanium Transistor musings

I have a TO-3 size Tung-Sol 86X2 germanium transistor, removed from, I believe, a low voltage regulator circuit in an organ (transitional age: 6 x

6CG7 master oscillators for the 12 individual notes, plus a lot of pairs of TO-5 germanium transistors for frequency division flip-flops to generate the lower octaves). Anyways, out of idle curiosity I hooked it up. Here's what I got.

Type: PNP germanium power transistor, pins as indicated on underside case = collector).

Maximum ratings: (Values at roughly 20-30°C. Values are absolute because I don't feel like writing negatives on every single parameter.) Vce = 22V (B open) Vcb = 30V (B, E grounded) (Zener type characteristic; no avalanche behavior noted.) Veb > 36V Maximum Ic, Ib unknown.

Didn't measure leakage currents. Didn't measure capacitances.

Operating Characteristics: Vc = 12V, Ic = 266mA, Ib = 1.7mA DC gain (beta) = 150 (200 at 50°C) Vce(sat) = 0.22V (Ib = 30mA, Ic = 1A) Vce(sat)

Reply to
Tim Williams
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On Mon, 06 Feb 2006 17:07:39 -0600, Tim Williams wrote: ... [PNP Ge transistor characterization] ...

So, what's the question? I just noticed the other day that in my parts bin I have 8X TIP33C, and almost 100X MPSA06. So what? ;-)

Cheers! Rich

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Reply to
Rich Grise, but drunk

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