03-06-2020, 10:19 AM
The BF337 had already been in use as a video output transistor for some time, so it wasn’t so unusual for someone to come up with a drop-in replacement for the PL802.
I remember reading the MOSFET Follies article a few years ago and never looking back. I’m usually happy to let solid state devices and tubes work together, particularly for the B+ supplies.
There was a time when some of the field service guys had got used to giving a soft crt "a tickle” by removing the crt anode cap and giving the tube base a squirt of EHT. This wasn’t too bad when say a PFL200 was employed as the video output device, but was instant death to the BF337.
I remember reading the MOSFET Follies article a few years ago and never looking back. I’m usually happy to let solid state devices and tubes work together, particularly for the B+ supplies.
There was a time when some of the field service guys had got used to giving a soft crt "a tickle” by removing the crt anode cap and giving the tube base a squirt of EHT. This wasn’t too bad when say a PFL200 was employed as the video output device, but was instant death to the BF337.
