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Designed to function with the 3CX1500/8877
New old stock in the original packaging * No longer available for export
MFR: EF Johnson
SKU: 122-247-1

The SK-400 Air-System Socket is the recommended socket for use with the 4-400A  tetrode, and it may be used as well with 4-250A, 4-125A and other tubes having the same dimensions, like the 3-500zg, or 3cx1200A7. The SK-400 provides efficient connection between the tube and its external circuits, acts as a firm mechanical support for the tube, and controls the flow of cooling air around the tube envelope.

Used * No longer available for export
MFR: Eimac
SKU: SK400-P

See Data Sheet

Photo is for reference only

The SK-400 Air-System Socket is the recommended socket for use with the 4-400A  tetrode, and it may be used as well with 4-250A, 4-125A and other tubes having the same dimensions, like the 3-500zg, or 3cx1200A7. The SK-400 provides efficient connection between the tube and its external circuits, acts as a firm mechanical support for the tube, and controls the flow of cooling air around the tube envelope.

This socket was customized by the previous owner to use a non-standard air source.

Used * No longer available for export
MFR: Eimac
SKU: SK400-P-CUSTOM

See Data Sheet

Photo is for reference only as each socket may have cosmetic differences

Designed to function with 4CX5000A, 4CX5,000R, 4CX5,000J 4CW10,000A 4CW10,000B 4CW10,000R, 4CW25,000A, 4CW25,000B, 4CPW10,000, and 4CW30,000A tubes.
Same as Y-291 except for bracket placement.
New Old Stock
MFR: Eimac
SKU: SK300

Designed to function with 4CX5000A, 4CX5,000R, 4CX5,000J 
Used
MFR: Eimac
SKU: SK300-P

This is the collet that fits in middle of 001837 & 001839
Size: 2.8" Inside Diameter
Used
MFR: Eimac
SKU: 001838-P

This is the collet that fits on the outside of 001837 & 001838 Collects on SK300A Eimac tube socket. Size: 3.8" Inside Diameter
Comes with the spring ring. Missing two teeth on the ring. 
Used
MFR: Eimac
SKU: 001839-P

Removed from working equipment. Has original circuitry attached as well as two large cable leads coming from the base of the circuit.
The socket has one tooth missing from the top ring.
Used
MFR: Eimac
SKU: SK300A-PWC
NOTE: Picture is the part you will be receiving.

• Designed to function with the 3CX1500/8877
• Includes Chimney

New old stock * New In Box * No longer available for export
MFR: EF Johnson
SKU: 122-247-1-BOX