10-29-2013, 07:14 PM
Awhile back I post that the grid leak resistor was bad (open) well tonight I thought I'd put the power to old gal and see if she jumps with excitement. I went downstairs to grab suitable replacement for the 'leak. Broke out the little red digital meter to double check the replacement. Got a 2M job and measured it. It measured open too Hmmm. Looked at the scale on the switch and it said 2000K and I thought sure sounds like a lot of ohms don't it?? I did some quick math on a piece of paper and little red meter will only read up to 2M. Well what do you know!! Went over to the bench and flipped on the old Heathkit V4 VTVM which will measure up the 100M. Don't know how accurate it is at 100M. Let it warm up for a few minutes it measures the 'leak at 5.3M. Perfectly fine for the grid leak. Generally speaking the higher the resistance of the GL the sharper the selectivity. So the old grid leak resistor is ok. The Mrs will be home soon so I better pickup my junk out of the living room. Hope she won't see the solder flicks and burn mark in the carpet.
More later
Terry
More later
Terry