Fw: [Amps] Conditioning Spare Tubes After Storage

[R.Measures]

Was the 10+ minute warmup time for a heater-type cathode or for a 
thoriated-tungsten type cathode?

>Hi Jeff, 
>-
>I've received some broadcast transmitter tubes with 
>recommended warm up times of 10 plus min, some 
>as high as 30 minutes min. 
>- 
>A fellow broadcaster (now an SK) never paid 
>much attention to the pre power warm up time 
>especially the first install. 
>-
>He called me over one night to source a 
>breaker trip problem which was traced back 
>to the tube, which was not allowed the 
>recommended pre start filament idle time.
>-...

-  R.L. Measures/Rich..., AG6K, 805.386.3734, www.somis.org