Philco Experts: Model 87 Grid Condenser?

[Winky Dink]

I don't know why I wrote "at the power transformer," except it was way past my bedtime. Yes, I did mean the '27 detector plate. With the '27 pulled, I get the same plate voltage--about 6V, and about 9V at filter block terminal 6.

The replacement caps are all nonelectrolytic, and they still look OK. To be sure, I'll take them apart, reassemble on the bench, and make a temporary reconnection before reinstalling the block.

The Rider's schematic is marked up with eight point-to-point voltages in the filter block. I'll check those voltages.

And I'll stop writing posts at 3 am.

Thanks.

[old_coot88]

Originally Posted by Winky Dink

...With the '27 pulled, I get the same plate voltage--about 6V, and about 9V at filter block terminal 6.

Since you indicate the 70K resistor feeding B+ to term.6 (point 'E') is good, you want to look for a low resistance leakage path from point E to ground.

The replacement caps are all nonelectrolytic, and they still look OK. To be sure, I'll take them apart, reassemble on the bench, and make a temporary reconnection before reinstalling the block.

Check the replacement 2mf cap for leakage.