UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Argus25 · 27th May 2018, 2:16 pm

If the V centering control works, your CRT is likely good. The V centering control alters the DC vertical deflection plate voltage, so the plates are working fine. So now you know there is no or little AC vertical deflection voltage coming out of the vertical deflection output amp. It could be that stage, but likely the vertical osc is not running.

Also, if the EHT is out of spec, the focus voltage will be too. It just looks like a very de-focused beam.

27th May 2018, 2:16 pm	#27
Argus25 No Longer a Member Join Date: Oct 2016 Location: Maroochydore, Queensland, Australia. Posts: 2,679	Re: Firestone 13G3 Television If the V centering control works, your CRT is likely good. The V centering control alters the DC vertical deflection plate voltage, so the plates are working fine. So now you know there is no or little AC vertical deflection voltage coming out of the vertical deflection output amp. It could be that stage, but likely the vertical osc is not running. Also, if the EHT is out of spec, the focus voltage will be too. It just looks like a very de-focused beam.