SCT-700 Power supply zener voltage

[RuudNL]

Who knows the original value of the zeners in the SCT-700 power supply?
Are they 75V (so output 150V) or 100V (output 200V)?
I have a power supply here, but I changed the zeners long time ago, so I can't check this.

 

[kingkorg]

They were 75v in my tBone psu from Thomman.

 

[RuudNL]

75 V. it will be then! Thanks.
(The Apex 460 uses 1N4764 zeners, according to the datasheet they are 100 V. This would mean 200 V. output and 100 V. polarisation voltage for the capsule. A bit "too much" in my opinion...)

 

[Tubetec]

I tried upto 100v volts polarising on LDC's , the membrane hit the back plate , didnt do any damage , but if theres any rough edges you could easily puncture the mylar .

 

[RuudNL]

In general, I consider 60 volts as a 'safe' polarisation voltage.