Eimac SK-740 Air-System Socket
Comes with what you see in the pictures. If you don't see it, you probably won't get it.
Specifications are from Eimac and may vary slightly due to upgrades, options, or revisions this unit may or may not have.
Believed to be new or slightly used. May be a little tarnished. Only includes what is seen in pictures.

Description:
The EIMAC SK-740 Air-System Socket is recommended for use with the tubes listed or other tubes having this special breech-block base. This socket is not intended for use with an Air-Chimeny, but is particularly useful in applications where transverse air cooliing, heat-sink or immersion cooling is intended. When this socket is used, connection is made to each of the tubes electrodes except the anode.

Base Connections:
The SK-740 socket consists of five sets of ring contacts: they are from top to bottom: 1) screen-grid, 2) control-grid, 3) cathode, 4) heater, 5) heater. Each set of contacts consists of six seperate contacting tabs. The tube elements are connected to their external circuits by two diametrically-opposed solder tabs. The SK-740 has no grounded contacts.

Materials and Finishes:
The mounting plate of the socket is fabricated of nickel-plated brass. The contact rings and tabs are of beryllium copper, heat-treated after forming, then silver-plated. The rivets and washers are of brass, silver and nickel-plated respectively. The ten contact terminals are solder-dipped to insure firm, dependable solder contact. The insulating wafers adn the stop yoke of the socket are molded of a flameproof diallyl meta0phthalate.

Installation:
The SK-740 Air-System Socket is designed for under-chassis mounting and requires a 1.593 inches diameter hole through the chassis deck. Four screw holes are provided for fastening.

Specifications:

Brand: Eimac

Recommended Tubes:

  • 4N15A
  • 4CX125C
  • 4CX125F
  • 4CX300A/8167 (Seperate means of directing air is required)
  • 4CX300Y/8561 (Seperate means of directing air is required)
    Bypass Capacitor:
       PF: 1100
       Voltage DCWV: 400

    For Domestic Customers: Packaging, handling, and order processing included in shipping in all domestic shipments as quoted by the shipping calculator. For International Customers there is a $10.00 minimum for packaging, handling, and order processing. International shipping to be determined by destination.

    Prior to shipment I will need to know the following information (filled out on a form that I will send you) for International Customers or Packages/Freight being Forwarded internationally. International customers may also be subject to a freight forwarder form if applicable.:

    (1) Are you the end-user of this item?

    (2) If you are not the ultimate end-user of the item, please state the ultimate end user's name.

    (3) What is the ultimate country destination?

    10/25/03