debaser138
Well-known member
Back in 2017 I had a G07 that I did a full cap kit and replaced the flyback on and it's been working fine until recently. Now it's going into HV shutdown with the B+ at 170v. I've tested all the normal suspects (FR901, FR401, R908, R902) and everything is good. If I remove X701 it's still in HV shutdown at 170v. I've also swapped in X902, X901, X701, X501, IC501 from my working chassis with no change.
I've replaced the B+ pot, the VR, HOT and even the flyback but no change.
When I fire it up it makes a weird squeak sound and then does it again when I power it off. If X701 is removed the squeak sound is not near as loud and it doesn't make the sound when I shut it down.
Here is a video so you can hear what I'm talking about:
I know it's not the tube or yoke as another chassis works fine on this tube.
Does this sound like a T501 or T503 issue? I've removed/reflowed the solder for both of those and I get a 50 ohm reading on the two legs near each other when I test them.
Any help would be appreciated. Thanks!
I've replaced the B+ pot, the VR, HOT and even the flyback but no change.
When I fire it up it makes a weird squeak sound and then does it again when I power it off. If X701 is removed the squeak sound is not near as loud and it doesn't make the sound when I shut it down.
Here is a video so you can hear what I'm talking about:
I know it's not the tube or yoke as another chassis works fine on this tube.
Does this sound like a T501 or T503 issue? I've removed/reflowed the solder for both of those and I get a 50 ohm reading on the two legs near each other when I test them.
Any help would be appreciated. Thanks!
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