Could be the quality of the copper sheets.
I believe, I read some wear.......the jackets start from a copper sheet. In the early days 50-60's it was hard to get consistent copper sheeting. Thickness wise.
By the way. the price of copper is going threw the roof.
I of course. Blame the Free Market Sys. And the PRC (Red China)is building a new Aircraft Carrier. You need tons of special cables for an Aircraft Carrier. The Newport News Shipbuilding spits out a new carrier every 5 yrs. This supply sys. is set.
New customer new shortage.
Variations in thickness could be the result. Or it could be an uneven coating of jacket lube.
I believe, I read some wear.......the jackets start from a copper sheet. In the early days 50-60's it was hard to get consistent copper sheeting. Thickness wise.
By the way. the price of copper is going threw the roof.
I of course. Blame the Free Market Sys. And the PRC (Red China)is building a new Aircraft Carrier. You need tons of special cables for an Aircraft Carrier. The Newport News Shipbuilding spits out a new carrier every 5 yrs. This supply sys. is set.
New customer new shortage.
Variations in thickness could be the result. Or it could be an uneven coating of jacket lube.