Or could be a TO-36 ? Round case (1.25" dia, 0.5" high), with 2 leads in a triangular formation with insulated index pin and threaded bolt with a solder eyelet through the centre of the underside of the package? (RCA may have used a different packaging to Motorola).
My RCA Manual says - obsolete Germanium PNP VCB 100V VBE 80V Ic 15A Pt 150W HFE min 25
These would be great for the mid '60s to early '70s car radios that used a DS501, 2N173 or 2N174 transistors. I have the three page Motorola data sheet in the 1970 Motorola Semiconductor data book, but it is very hard to scan because the paper is so thin you get print through. I'm looking for some black construction paper to reduce the effect. If I can find some I'll scan it for you.
BTW, the T)36 case was often referred to as a "Doorknob"
Former professional electron wrangler.
Michael A. Terrell
Hello Michael, the quality of those diagrams are fine. I can read them. Thanks for that. I am going to enjoy poking around in this old millivoltmeter. I never imagined in a voltmeter there would be an electric motor spining a disk with holes in it that allowed light to travel along a plastic tube to shine on to light dependant resistors. Now I can see a 100KHz oscillator there too! I wonder what that does.
With the circuit from you, Michael, I can get this old meter partly working. Half the probe is missing, the bit with the diodes in it. When I find that part or a replacement probe, there is a chap down in Adelade who has some probe accessories for sale, then it will all come together. Excellent! You know, this is news groups working at their best. I am enjoying this.
This is my type of electronics. Knobs, switches, motor, meter, valves, transistors and all in the one box too. I love it! Thanks again Mike. :-)