19-07-2023, 02:05 PM
Hi Steve,
those Mazda T41 thyratrons are prone to erratic performance, sometimes you can get away with swopping the line and frame T41s around, but replacement is the only answer.
The timebase circuits and components in the TA201 continued to be employed in Ekco TV sets as late as 1948, models TS46, TSC93 etc.
The 6.3volt version, the 6K25 seems to be more reliable. Employed in the ViewMaster TV set.
This afternoon I will attempt to coax the frame timebase to generate more vertical scan.
Geordie McBoyne.
those Mazda T41 thyratrons are prone to erratic performance, sometimes you can get away with swopping the line and frame T41s around, but replacement is the only answer.
The timebase circuits and components in the TA201 continued to be employed in Ekco TV sets as late as 1948, models TS46, TSC93 etc.
The 6.3volt version, the 6K25 seems to be more reliable. Employed in the ViewMaster TV set.
This afternoon I will attempt to coax the frame timebase to generate more vertical scan.
Geordie McBoyne.
