Browning Eagle 0B2 problems

[bountyhunter]

I just started on a Browning Eagle 68R. Replaced all caps,tested all the tubes except 0B2. Receive is dead, audio is working. The 31.4 mhz oscillator is not working. Voltage on the plate of 0B2 is high at 265v. Does this mean the 0B2 leaked all the magic gas out and needs replaced. I'm not familiar with the 0B2 and I don't have a spare. I don't have much hair left to pull out. Any help is greatly appreciated. Thank you

[2600]

The 0B2 is a shunt regulator. It holds the voltage more or less steady by drawing either more or less current needed to hold the voltage across the tube steady at (I think) around 105 Volts DC.

Later models used a 10-Watt zener diode. If your 0B2 shows 265 Volts, it has failed and needs to be replaced. We use a 100-Volt 10-Watt zener in place of that tube. The later Browning receivers used this part: stores.goldeneagleradios.com/1n3005b-zener-diode-100-volts-10-watts/

It's at least as rugged as the 0B2 tube, and tends to last longer.

Until that 31.4 crystal is running, you won't hear a thing. V3 has to be good for it to run. If the crystal proves to be bad, Barkett has that, too: stores.goldeneagleradios.com/browning-receiver-crystal-31-400/

73

[bountyhunter]

Thank you! I'll get one ordered.