UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Heathkit IG-102 Earthing The Chassis

FrankB · 16th Nov 2018, 8:38 am

I would be concerned about the chassis ground, filament, and B- grounding to the chassis if you add a 3 wire cord to it.

I always plug test equipment and whatever I work on into separate isolation transformers.

(I remember back in tech school the teacher was, well, to be generous, let's just say not the best, and never taught us about "hot" grounds.
I blacked out the entire building 2 times before we students figured it out. Hot chassis TV set and hot chassis Telequipment scope= Blackout, not to mention frying the TV sets power supply).

Also I'd replace the line bypass cap with a proper X-Y type if it's not a ceramic.

16th Nov 2018, 8:38 am	#5
FrankB Heptode Join Date: Oct 2005 Location: Olympia, Washington, USA. Posts: 664	Re: Heathkit IG-102 Earthing The Chassis I would be concerned about the chassis ground, filament, and B- grounding to the chassis if you add a 3 wire cord to it. I always plug test equipment and whatever I work on into separate isolation transformers. (I remember back in tech school the teacher was, well, to be generous, let's just say not the best, and never taught us about "hot" grounds. I blacked out the entire building 2 times before we students figured it out. Hot chassis TV set and hot chassis Telequipment scope= Blackout, not to mention frying the TV sets power supply). Also I'd replace the line bypass cap with a proper X-Y type if it's not a ceramic.