08-02-2022, 06:41 PM
Hi.
Got a couple of hours on the V200 this afternoon. Initially there was no 100ma valve heaters which turned out to be a non soldered heater pin on a 10F1. I didn't have a good PL38 so a 30P4MR was substituted. Prior to powering up I replaced the following coupiling caps. Line drive, video o/p to sync separator, frame o/p coupling, didn't bother with to sound as yet as keeping the volume at minimum keeps any positive volts off the grid of the 10P14.
Gradually brought up the variac and eventually was rewarded with a noisy line whistle, small spark on the U25 but virtually no EHT, the blue glow from the valve was the giveaway the Visconol EHT cap was in distress, disconnecting it confirmed the diagnoses with a very bright low height raster.
Now to do the rest and tidy up some of the previous work
Got a couple of hours on the V200 this afternoon. Initially there was no 100ma valve heaters which turned out to be a non soldered heater pin on a 10F1. I didn't have a good PL38 so a 30P4MR was substituted. Prior to powering up I replaced the following coupiling caps. Line drive, video o/p to sync separator, frame o/p coupling, didn't bother with to sound as yet as keeping the volume at minimum keeps any positive volts off the grid of the 10P14.
Gradually brought up the variac and eventually was rewarded with a noisy line whistle, small spark on the U25 but virtually no EHT, the blue glow from the valve was the giveaway the Visconol EHT cap was in distress, disconnecting it confirmed the diagnoses with a very bright low height raster.
Now to do the rest and tidy up some of the previous work
