Hi... I'm working on a Zenith transoceanic 8G500YT. Got a couple questions:

1. The schematic shows a 40/20/10 mfd filter cap. But the actual installed can is marked: 40/20/20 mfd. I'm going to re-stuff it with 47/22/22 mfd caps. Do you see any problems with that?

2. The schematic shows an 88 ohm power resistor connected between the filter cap and rectifier (117Z6). Some repairman in the past replaced it with a 50 ohm resistor... what value should I use to replace it?

One end of the 50 ohm resistor is just loosely wrapped around the tube pin and not soldered... good grief!!

Sorry, fellows... I'm meant to type: 8G005YT of course.

I don't think your proposed up-sizing of the filter caps will cause a problem. But I wouldn't go any higher than what you propose.

My guess is that the original 88-ohm dropping resistor burned out, and a repairman just stuck in what he had available for a replacement.

You could try leaving the 50-ohm resistor in, and check the B+ voltages - and if they are too high, you should increase the resistor value. Use a power resistor with adequate wattage.

Schematic: http://www.transoceanic.nostalgiaair.org/8g005/8g005.pdf

Doug

:Hi... I'm working on a Zenith transoceanic 8G500YT. Got a couple questions:
:
:
:1. The schematic shows a 40/20/10 mfd filter cap. But the actual installed can is marked: 40/20/20 mfd. I'm going to re-stuff it with 47/22/22 mfd caps. Do you see any problems with that?
:
:
:2. The schematic shows an 88 ohm power resistor connected between the filter cap and rectifier (117Z6). Some repairman in the past replaced it with a 50 ohm resistor... what value should I use to replace it?
:
:
:One end of the 50 ohm resistor is just loosely wrapped around the tube pin and not soldered... good grief!!

Thanks Doug, appreciate your comments. Here's a picture of the resistor. I'm new at this and this is a new one for me -- It measures 53 ohms. Is this called a dog bone? Anyway, thanks again.

That's a flexible resistor, not a dog-bone. Its value may likely increase when it heats up. I'd leave it in for the time being, and check the plate voltages later.
Doug

:Thanks Doug, appreciate your comments. Here's a picture of the resistor. I'm new at this and this is a new one for me -- It measures 53 ohms. Is this called a dog bone? Anyway, thanks again.
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