Conserving our good CRT's

[earlyfilm]

Originally Posted by kramden66

i do have an interesting 16GP4 that reads way high on the emissions and cutoff is good but to get a decent image it needs a brightner and the ion trap has to be pushed as far forward as possible , its touching the focus magnet , my only guess here is that it was rebuilt but not properly.

Mike,

Per the Tung-Sol data sheet

http://tubedata.tigahost.com/tubedat...27/1/16GP4.pdf

16GP4 and 16GP4C use 23 Gausses ion trap
and
16GP4A and 16GP4B use 35 Gausses ion trap

Could be you have the wrong strength magnet if it is a replacement CRT

James