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Old 9th Jun 2018, 9:51 pm   #9
kalee20
Dekatron
 
Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,060
Default Re: Cathode follower anode resistor.

It's definitely a 'gotcha!'

Any emitter-follower I use, if the base is driven from a capacitor-to-ground, I make sure I allow for a series base resistor, just in case. I've seen one case of instability - 'scoping on the emitter, the voltage looks about right but the scope trace is thickened, due to a few hundred mV of oscillation at VHF (at least).
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