SK3A Svetlana coaxial Socket for GU84B/4CX2500A have porcelain chimney and has 6 built-in screen bypass capacitors for HF/VHF and 10x15OHm cathode resistors . This is 1,5 Ohm 15W Total (more 50W if blowing)
It is uneasy and nice made socket,the best for GU84B/4CX2500A!
SK3A is a special Svetlana socket for the GU84B(4CX2500a-U.S.mark) tube.Not in production since 1993.
It is made of high-quality dielectric and provides four pins at 90