Heres a link to the new non-resistor Champion comparable to the old J11Y, the C at the end is for Copper and thats pretty much the same heat range. Now I've never run them just saying they are out there, on planet earth. And the new ones quality compared to the old(60's-70's) is unknow personally by me from experience.
And the new ones quality compared to the old(60's-70's) is unknow personally by me from experience.