RF and Microwave Components Online Catalog

The front two sections and the back two sections each measure 24 to 300 pf per gang. The middle sections measure 33 to 307 pf. Total capacitance for all sections ganged together is approximately 87 to 907 pf.

These capacitors were removed from BRAND NEW, factory-sealed equipment, so they are in perfect condition. They are an extremely high-end unit, are beautifully made, and tune very smoothly. The front of each unit has a circuit board and coding plate which appears to be capable ofsignaling end-of-range to a remote device, but I have no data available on this board. The circuit board and coding plate are easily removable if desired (hex screws) leaving a 1/4 inch shaft.

The unit measures 8.75 inches long X 2.7 inches wide X 3 inches high, not including the circuit board and shaft protuding from the front. Length including the shaft is 9.5 inches overall. Weight is 4.25 pounds per unit.

The plate gangs are as follows: 

- Front compartment is one large gang, and one small gang . Capacitance is 25 . 3 - 298 pf
- Middle compartment is small gang, large gang, small gang . Capacitance is 34 . 5 - 310 pf
- Back compartment is small gang, large gang . Capacitance is 26 . 5 - 299 pf
- Maximum voltage on all gangs is slightly less than 1 kv .

The photogtaph shows 3 of these units, with the cover removed from one, showing internal construction. (Covers remove and reattach easily with machine screws) The other units show the front coding plate and circuit board, as well as the silver-plated finger stock for contact to chassis.

US one dollar bill for scale.

LARGE QUANTITY AVAILABLE. Price: $10 each! (Order Now!)

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Air variable capacitor stock # AC-2 is brand new, old stock. (May have some tarnish from storage.) These caps measure 16-67 pf, and hipot test to a maximum of 5 kv. (probably rated as 4.5 kv by the manufacturer, but we have no manufacturer's name or part number on this item.  Shaft diameter is 1/4 inch, and shaft extends out the front end only, about 1.5 inches from the body. Body measures 4.6 inches long X 2.75 inches wide X 2.6 inches tall. Overall length including shaft is 5.75 inches. Weight is 11.25 ounces or 320 grams. With 9 rotor plates and 8 stator plates. Refer to our stock # AC-2.  Price: $25 each (Order Now!)

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Five Gang Loading Capacitor & Gear Reduction

We have acquired good quantity of these extra-nice air variable capacitors, NSN (national stock number) 5910-00-323-0395, manufactured under contract for the US Air Force by Alest, Inc .  These 5 gang variables measure approximately 15 - 420 pf per section .  This makes the 5 gangs together total at about 75 - 2100 pf . (They are marked as 5 X 370) They hipot test to a little over 1kv . Overall length is 10 inches . Width is 3.25 inches for body of capacitor, and maximum width of gear reduction gang is 4 inches . Body height is 1 . 75 inches . Height of gear reduction gang is 2 . 75 inches .  Weight is approximately 3 . 6 pounds .

The front of this capacitor has a 5/8 OD threaded tube protruding from the gear reduction gang . Recessed inside this tube about 1/4 inch is a 1/4 OD splined shaft for tuning .  The gear reduction is multi-reduction, and requires 57 turns of the shaft for full travel, giving great precision in tuning without the need of an external vernier drive! Mil-spec all the way, gears are solid brass . The shaft may be connected by means of a 3/8"OD X 1/4 ID coupling tube, which will fit inside the 5/8 OD threaded tube, and slip snugly over the 1/4 splined shaft . A little adhesive inside the coupling tube will give a non-slip connection, and will accept a standard 1/4 inch external shaft for tuning . We can supply s small piece of clear vinyl tubing of these OD / ID's at no charge on request with purchase .

This is an EXCELLENT loading capacitor, with super smooth tuning and excellent resolution .  Condition: Most are brand new, military spares . Some may be removed from equipment, excellent. Price: $39     (Refer to our stock number: #  AC-6) (Order Now!)

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Air variable capacitor stock # AC-7 is manufactured by Cardwell, and is Cardwell model # 154-12-6. This capacitor tunes 11-53 pf, and is rated at 4.5 kv maximum. Shaft is 1/4 inch diameter, and extends 5/8 inches from the front of the body, and 5/8 inches from the back of the body. The back shaft has a nylon gear, which is coupled to a second (stainless) gear below, with 3 : 1 gear reduction.

If desired, the stainless gear is easily removed (by means of a single "C" clip).  Has 6 stator plates and 6 rotor plates. Weight is 11 ounces, or 310 grams. Condition is removed from equipment, excellent. Measures 2.5 inches wide X 2.5 inches tall X about 4.5 inches long overall including shaft and gears. Large quantities available.

Refer to our stock # AC-7. 

Price: $15 each (Order Now!)