Newbie's First Questions RCA TS 721 Restoration

[Notimetolooz]

Originally Posted by Chris K

So here is a question that puts my inexperience on full display. The electrolytic caps C131, C132, C116, C127 and C128 are not grounded to the chassis. When I have substituted for them, I've just tied all of the negative leads of the new caps to one another on a terminal strip. For example, the original C131 has a 30uf and a 10uf cap. I disconnected the leads to C131, put in a terminal strip, tied the negative leads of replacement 47 and 10uf caps together and re-soldered the chassis wiring back to the new caps. I didn't pay attention to replicating the negative lead specificity from the connections to the old cap because placing a meter lead on any of the 4 negative leads exiting the bottom of the original gave me the same capacitance reading on the 30uf and 10uf caps in the original. Would this be the correct thing to do, just tying the replacement capacitor negative leads and soldering the chassis leads that had in the original configuration gone to 2 negative leads on C131 to the single new tied negative? I'm not sure if my connections to the negative leads of the new electrolytic caps is causing new problems. TIA for any assistance.

Chris

It took me a while to understand your question. The confusion came from you using the phrase "negative leads", I think what you are referring to is the four negative tabs of the original cap. Those tabs (for mounting usually) are mechanical structures that are all electrically equivalent. So sure, tying the negative leads of the the two new replacement caps together and connecting all the wires that went to the four tabs to that negative is correct.
What Kevin and I was afraid of at first was that you were referring to was connecting the negatives of all the different original caps together where they should be separate. That would be bad.

[Kevin Kuehn]

Originally Posted by Notimetolooz

What Kevin and I was afraid of at first was that you were referring to was connecting the negatives of all the different original caps together where they should be separate. That would be bad.

With the exception that the negative side of C116A,B,C,D does go to chassis ground. You really can't make any assumptions which requires learning to reference and decipher the schematic drawing.

Originally Posted by Chris K

So here is a question that puts my inexperience on full display. The electrolytic caps C131, C132, C116, C127 and C128 are not grounded to the chassis.

Chris