UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Oh no

dominicbeesley · 13th May 2010, 1:13 am

Thanks Trevor,

A few more caps and resistors changed and I've now got a line and frame locked and steady-ish picture.

Still got very low (7kVish) EHT and (350V) boost so the picture's a bit soft and the focus still needs to be fully clockwise...I've measured all the voltages and waveforms around the line stage (as per Pye manual) and tested the valves and can't see what's up so can only assume the LOPT isn't too healthy.

Hopefully a break tonight and I'll spot another deliberate mistake!

Dom

13th May 2010, 1:13 am	#40
dominicbeesley Octode Join Date: Nov 2004 Location: Hebden Bridge, West Yorkshire, UK. Posts: 1,885	Re: Oh no - another V4! Thanks Trevor, A few more caps and resistors changed and I've now got a line and frame locked and steady-ish picture. Still got very low (7kVish) EHT and (350V) boost so the picture's a bit soft and the focus still needs to be fully clockwise...I've measured all the voltages and waveforms around the line stage (as per Pye manual) and tested the valves and can't see what's up so can only assume the LOPT isn't too healthy. Hopefully a break tonight and I'll spot another deliberate mistake! Dom