Just for a reference point.
A small 12 kV diode I just tested has a forward voltage drop
of 25 volts at 5 mA, and it has a 35 volt forward drop at 10 mA.
The data sheet for 2CL73, 12 kV diode rates it at a
37.5 volt drop at 10 mA
----- Original Message -----
Sent: Saturday, May 18, 2013 7:58
Subject: [TekScopes] Re: Tektronix
R7844 Problem: can not set intensity and focus
If this 12kV diode is made up of 30 diodes in series, each
with 0.6V forward bias voltage, then it will start to conduct at 18V,
Simple DMM test would not yield meaningful result because the
supply voltage is too low to make them conduct, that explains! Thank
--- In TekScopes@..., Göran
> Hi, 12kV diodes are
made up by a number of series diodes and therefore your test has failed.
Your diodes may
> very well be ok.