On Tue, Jun 26, 2018 at 11:02 pm, Jeff Urban wrote:
On Mon, Jun 25, 2018 at 10:37 pm, Craig Sawyers wrote:
THEN YOU SHORT THE EXPOSED TIP OF THE CRT WIRE TO GROUND
Sorry, I didn't take that as meaning the lead from the CRT, I thought you
meant the lead out of the multiplier.
Doing that after it is powered up and down, if it has an arc you have cleared
the CRT and the multiplier, but don't yet know which one is bad if it doesn't.
So you didn't say to turn it on and arc the anode lead (output of the
multiplier) to ground. This appears to be my mistake. You probably agree that
it is not a good idea to arc the source while running to ground, but you never
said that it was.
I'm sorry, it's my mistake.
I have read here that discharging the CRT to the frame on the 485 has been know to kill U660 so that is one reason I would like to learn of another way to do it.
