Duncan's 1960 Magnavox

[old_tv_nut]

I general, don't replace composition resistors with wirewound, because they may affect frequency response of high frequency circuits. Replacing wirewound with wirewound is a good idea.

1% tolerance is a waste in consumer tube sets, because the variation from tube to tube in a circuit will completely swamp that out. The exception is test equipment where multiple low-gain feedback stabilized sections are used to make the gear maintain calibrated state at least for a while.

In transistor circuits, variations due to the transistor itself are usually much smaller than variations due to passive components.

5% film resistors when replacing other than wirewound are usually not a bad idea.

[Mr.Duncan]

Checking ESR on both capacitors on the vertical circuit.

Both these new capacitors are .1uF @ 400volts.

I checked and found ESR ratings of:
C40: 16.6
C39: 16

I de-soldered them, and got the same ESR ratings, with the same .1uF.

I cant seem to find a chart/data on ESR ratings for high voltage, low uF capacitors. Are these ESR ratings bad? The uF test shows the correct uF value.

tube by Thomas Duncan, on Flickr

C40
PXL_20240810_233255415 by Thomas Duncan, on Flickr

C39
PXL_20240810_233312649 by Thomas Duncan, on Flickr