23-05-2018, 08:59 AM
Hi.
I was reading about the CTM4 on the UKVRRR forum and my V4 has come up re a LOPT transplant. Indeed it has a Ferguson transformer fitted. It works perfectly although I had to alter the scan coil wiring from parallel connection of the coils to series. Line linearity is pretty good and really the only way to see it's off a little is to measure the squares on the test card. EHT is 12kv and with much improved regulation no serious defocussing on increasing the brightness. The transformer though is decidedly loud, that 10, 125hz whistle is painful according to Anne.
I was reading about the CTM4 on the UKVRRR forum and my V4 has come up re a LOPT transplant. Indeed it has a Ferguson transformer fitted. It works perfectly although I had to alter the scan coil wiring from parallel connection of the coils to series. Line linearity is pretty good and really the only way to see it's off a little is to measure the squares on the test card. EHT is 12kv and with much improved regulation no serious defocussing on increasing the brightness. The transformer though is decidedly loud, that 10, 125hz whistle is painful according to Anne.
