A Narrow Horizontal Hold Control

[Crist Rigott]

Guys,
I have 2 10L43 Predicta chassis that I have restored. All film, electrolytic, mica, and resistors have been replaced. They both work nice but one has a very narrow H. Hold control. In other words, turning the H. Hold control about 30 degrees either way and the picture unlocks. The other chassis has a nice wide range of rotation to unlock the picture. Both chassis has the diodes replaced with 1N4148. I swapped the 6CG7 tubes between the chassis with no joy. I went through the H. Set up per Sams an each chassis.

Any idea as to what could be the problem?

Thanks.