[R-390] Sources for HP410C AC Probe

[2002tii]

Scott wrote:

>A 6X5 sounds a little big for use in a probe---how about using a 
>6AL5 double diode with both sides in parallel? A 6AL5 is only good 
>for about 400 volts rather than the 1000 volts that the EA53 can 
>stand but 400 volts is plenty for most applications and the 6AL5 is 
>tiny by comparison an also offers similar heater to cathode capability.

You're absolutely right, the 6AL5 is what I had in mind.  The 6X5 is 
an octal power diode.  Using just one of the 6AL5's diodes keeps the 
capacitance down and raises the high frequency limit of the probe a bit.

Best regards,

Don