can anyone recomend a solid state equvalent to an ob2 tube

[pucho812]

I'm looking for a solid state replacement for an ob2 tube. Intern broke one as he was trying to rack the MCI. I told him not to touch but he did anyway.

I'm thinking a zenier diode like a 3 watt would do me just fine

 

[abbey road d enfer]

I'm looking for a solid state replacement for an ob2 tube. Intern broke one as he was trying to rack the MCI. I told him not to touch but he did anyway.

I'm thinking a zenier diode like a 3 watt would do me just fine

An OB2 is supposed to run at about 20mA. The circuitry around it is dimensioned for that.
that works out at a tad over 2W. So a 3W Zener should be adequate.
BZT03D110 seems to be perfect.

 

[pucho812]

thanks. this would be the second ob2 tube that would be replacing so zener should be cheaper all around
..

and to connect I would put the diode where pins pins one and 7 connect.

 

[abbey road d enfer]

thanks. this would be the second ob2 tube that would be replacing so zener should be cheaper all around
..

and to connect I would put the diode where pins pins one and 7 connect.

in the OB2, 1 & 5 are connected, as are 2. 4 & 7. This arrangement is intended to disconnect the high-voltage when pulling out the regulator tube.
When replacing with a Zener, you may have to jumper some pins.

 

[pucho812]

oh yeah, I just relooked at the data sheet