[Hallicrafters] Technical questions:

[K9FFK]

Waldo Magnuson wrote:
> Carl (KM1H) said:
> Sometimes a little change of pace wakes up a usually dull and dead forum.
> Im rather surprised that there are so few threads of a technical nature.
>
> So here is a technical question of sorts:  I have a simple power 
> supply which has a tube between the output of a 4 diode bridge and the 
> B+ to the equipment.  I can not read the tube type on the glass (it's 
> been polished off).  The diode bridge connects to pin 1, pin 2 goes to 
> ground through a 2.2K, 2W resistor.  pin 5 goes to the output (135 
> volts).  No other connections - it is a 9 pin (or 7 pin - I'd have to 
> look again) miniature tube.  I would like to know what type of tube it 
> is for drawing the schematic.  How do I identify it?  Is there a 
> visual tube expert out there that if I sent a close-up picture it 
> could be identified from the structure?  I suspect it is a ballast 
> tube but I'm not sure.
>
> 73,  Skip W7WGM
>
> ______________________________________________________________
>
Soumds like a gas regulator tube, Skip.
But the voltage is a little low for an 0A2/6626 - 150 V.
pins 1 and 5 are the anode, pins 2,4,7 are cathode.

There are allegedly 6213 - 130 V and VXR130 - 130V varieties but I don't 
know the pinouts.

Dick K9FFK