Width & Focus in DuMont RA-103

[cbenham]

Originally Posted by Phil Nelson

I tried the width adjustment again, but still no joy there. Phil

This note and your early comment about the focus coming in momentarily then getting blurry again as well as the higher voltage than shown in the schematic has me wondering if by chance an electrolytic you installed is wired wrong?

This has happened to me. I mis-wired a cap in the power supply and while the set worked, the picture was too wide and the focus control would only get 'close' to correct at the end of rotation of the control.

Cliff