Tv picture widener

[Electronic M]

Originally Posted by old_coot88

[EDIT.] Hor output cathode current also drops proportionately with each step up, contributing to "no free lunch".

In color sets where the cathode current is excessive and can't be adjusted low enough on top of poor width I think with regards to lowering cathode current "win-win" would be more accurate than "no free lunch"...

[old_coot88]

Originally Posted by Electronic M

In color sets where the cathode current is excessive and can't be adjusted low enough on top of poor width I think with regards to lowering cathode current "win-win" would be more accurate...

But only to a point, where HV regulation falls apart from insufficient power driving the flyback. There were certain 25" Admirals in particular, using 6KD6 and that crazy pulse-feedback HV regulation. Cathode current would spike to over 400 ma. on bright scenes, and we played with G2 voltage and different damper cap values, to get K current within reason consistent with stable regulation and width. We informed the customers of the modding, and told them to holler if it didn't hold up, but it held up OK.