[Radioroslyn]

https://en.wikipedia.org/wiki/Potentiometer

Yours is a dual pot, it has two sections. Can't seem to find the resistance for each section. One section shorts the ant to the chassis at low volume and the other section controls the gain of the rf amp stages.

Sorry I misspoke the model 77 uses a dual volume like the model 70. The model 87 uses a single volume control @ 10,000 ohms (10K)
I was going be the Post Subject line and assumed that we where still addressing the model 77. If you would be so kind to  start a new thread when you asking question about a different chassis it would relive this confusion.

On your 87 filter caps don't use electrolytic caps. They are small in size and inexpensive but they can't sustain the ripple current and will short after a brief period of time. What you what to use is mylar or film capacitors. They are much larger than the e caps but way smaller that the original that reside in the can.