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Old 16th Sep 2019, 7:43 am   #36
beery
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Join Date: Jun 2006
Location: Ware, Hertfordshire, UK.
Posts: 988
Default Re: Yet Another Bush TV22

Hi Peter,
looks good so far.

Now I know from its circuit position, C63 should not effect the frame timebase, it is worth checking anyway as I usually find it to be low in value, which is a supprise as the dual canned C61 and C62 are usually fine.
I do have a spare for C61/C62 and a linearity coil, but won't be able to get to them before Christmass.

Another thing you could try is replacing the PZ30, just in case it is a bit leaky.
I have had field hum from ECL80 valves, you have swapped them, with each other or did you try a spare? I have known two valves to have similar problems if they have been well used (I know this is unlikley though).

Cheers
Andy
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