[Amps] input matching question on the YC156?

[Neil Carr G0JHC]

AG6K wrote:   


To observe how much warmup time a heater-type cathode requires, 
connect a DMM between the cathode and the grid, apply heater power 
(only) and measure the potential  as the cathode warms up.  When the V 
stops increasing, the cathode is warmed-up. A retired Eimac engineering
department employee told me that an 
additional 30-seconds of warmup above the stated spec is not a bad idea 
since the marketing department was constantly trying to push specified 
warmup times lower than the engineering department wanted.



Interesting ...the YC156 is quoted as min 6 mins warm up.

Volts don't become "rock solid" until about 6 mins 40 secs....with the above
test.


Add a minute to your warm up timers guys.  

73 Neil G0JHC