Chuck / KE4ETH wrote:
I have a question about checking resistance via chart in manual.

A tube check good on a tubetester, but the resistance is way off from the
chart. 5k ohms vs. 200k ohms. when the tube is pulled the pin measures about
175k. all other pins check within 20-25k ohms on every tubes including the
questionable tube.

What is this chart that you are using? Are you talking about measuring
resistances in-circuit with the manual for the equipment?

What is this pin?

does this mean this tube is bad or only unusable for this application. It's
the RF mixer in a Tempo one (the manual is packed, we had some floor
replaced and I can't get to it at the moment.

It's the first RF Mixer.

Does the mixer stage work? If the tube tests good and you are getting
signal at the IF strip, don't worry. If you aren't getting signal, something
is wrong, but if the in-circuit resistances are wrong it's probably not the
tube that is wrong.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."