Duncan's 1960 Magnavox

[Mr.Duncan]

I removed each paper/wax cap and started replacing them with film caps.

Again, I heard and read the diagrams online, it seems these yellow film caps are not polarity sensitive?

Most of the caps were rated to 400v, the replacement caps I used were around 600-630v. Same uF factory rating with a tolerance +/- 10%

PXL_20240730_204949224 by Thomas Duncan, on Flickr

PXL_20240801_010015986 by Thomas Duncan, on Flickr


PXL_20240801_010041094 by Thomas Duncan, on Flickr

[Mr.Duncan]

I know any normal electrolytic capacitors ARE polarity sensitive, and should never have the + terminal installed to chassis ground.

I don't understand why the diagram shows Cap #4 with + to ground.

I thought it was a typo, but the OG capacitor was installed in the same way.

So, I installed the replacement 2uF / 50v cap with the + terminal to chassis ground.

PXL_20240803_005803186~3 by Thomas Duncan, on Flickr

OG cap:

received_1052973953063467 by Thomas Duncan, on Flickr

New cap:

received_1249401692693103 by Thomas Duncan, on Flickr

[Mr.Duncan]

I ended my day with a visit to the local Houston EPO store.

Picked up a nice looking, and working! Tube tester.

PXL_20240803_141622095 by Thomas Duncan, on Flickr

PXL_20240803_153220060 by Thomas Duncan, on Flickr

PXL_20240803_153226760 by Thomas Duncan, on Flickr

PXL_20240803_163259167 by Thomas Duncan, on Flickr

PXL_20240803_164418694 by Thomas Duncan, on Flickr