For sale is your choice of these rare, WWII era air-dielectric capacitors, left behind in the radio electronics inventory of my late father.  He was an active HAM radio operator for over 70 years, and was a radio and other electronics serviceman for much of his life.  He always kept a generous inventory of spare and replacement parts on hand, for speedy service calls for his customers, available for walk-in customers to his service shop, and handy for his own electronics projects.   All his components were stored in a dry, smoke-free environment.   (If you are interested in several, note that any purchased beyond the first one ships free.)

My husband has a fairly good understanding of electronics, so he did a bit of research in vintage catalogs and on line, and he helps us with a good explanation of the items we have here.  Here's what we have:

Description: These are World War II vintage, compact, high quality, name brand, air dielectric trimmers, with high-end capacities ranging from 90 to 150 PF (picofarads). These extremely RARE, pre-owned, variable capacitors, man-ufactured by ASP and HAMMARLUND belonged to a former member of the U.S. Army Signal Corps. He was a life-long Ham radio amateur and the proprietor of his own Radio/TV repair shop. (Further component history is unknown.) Highly prized by Amateur Radio enthusiasts, these components are used in receivers and transmitters to calibrate internal circuits, such as band set, band spread, final plate tuning, antenna loading, etc.

Inventory Class: Pre-owned. Some desoldering may be required.

Condition: As found — As is — As Photographed. These items are pre-owned. Some desoldering may be required. Items may have dust, dirt, wear, dents, rust, chips, scratches, oxidation, etc. which can result from usage or age-related, environmental, handling & storage effects. See photographs. All electronic artifacts are non-returnable. Buyer should review photos and the applicable texts before deciding to purchase these vintage parts. Application engineering is the Buyer's responsibility.

Who Wants It? Radio Amateurs—Collectors of vintage, Electronic Components— — Experimenters — Collectors/Restorers of vintage Electronic Equipment — Collectors of ASP or HAMMERLUND radio parts — Electronics Repairmen — Public or Private Museums —


ITEM “A”

Manufacturer: HAMMARLUND (molded in ceramic) New York, U.S.A.

Part Number: 48-32 (ink-stamped on ceramic).

Capacitance: Measured range: 10 PF to 90 picofarads

Mounting: Panel mounting on about 21/32-inch centers. Two #4-40 machine screws, with washers & lock washers are included.

Construction: Dual functionality - This condenser has a slotted shaft for a screwdriver; with option for the buyer to supply and attach a collet or radio knob, secured by set screw.

Plate Geometry: half-round

Plate Radius: about 27/64-inches

Plate Spacing: about 0.014-inches

Stator Plates: 10 total

Rotor Plates: 10 total

Stator Terminals: Two (2) tinned, wire-wrap terminals

Rotor Terminal: One tinned, solder terminal (about 1/8-inch wide by 3/4-inch long) with a soldered, ring terminal extension.

Ceramic Dimensions: About 15/16-inches wide. About 1-13/64-inches high.

Max. Depth from Panel: About 1-21/32-inches


ITEM "B"

Manufacturer: American Steel Packaging Company (ASP) Defiance, Ohio, U.S.A.,  ASP (molded in ceramic).

Company History: American Steel Packaging Company began making barrels and metal drums in 1904. In 1925, ASP entered the radio parts industry, and began mass production of quality radio components. After the start of World War II, the U.S. Army Signal Corps. asked ASP to make air trimmers, similar to the artifact offered here. ASP air trimmers were used in military communi- cations, radar and commercial equipment. They also controlled color hues in early color television circuits. ASP was sold to All Star Products, Incorporated in 1950.

Part Number: CA254 (ink-stamped on ceramic).

Capacitance: Measured range: 10 PF to 113 picofarads

Mounting: Panel mounting on about 21/32-inch centers. Two #4-36 machine screws, with washers & lock washers are included.

Construction: This versatile condenser features dual functionality for rotor adjustment, with screwdriver slot & ¼-inch hexnut.

Plate Geometry: half-round

Plate Radius: about 27/64-inches

Plate Spacing: about 0.015-inches

Stator Plates: 14 total

Rotor Plates: 14 total

Stator Terminals: Two (2) tinned, wire-wrap terminals.

Rotor Terminal: One tinned, solder terminal (about 1/8-inch wide by 3/4-inch long).

Rotor Adjustment: Dual functionality - slotted shaft for screw- driver; and ¼-inch hex for nutdriver or wrench.

Ceramic Dimensions: About 15/16-inches wide. About 1-13/64-inches high.

Max. Depth from Panel: About 1-9/16-inches


ITEM "C"

Manufacturer: American Steel Packaging Company (ASP) Defiance, Ohio, U.S.A.,  ASP brand (molded in ceramic).

Company History: American Steel Packaging Company began making barrels and metal drums in 1904. In 1925, ASP entered the radio parts industry, and began mass production of quality radio components. After the start of World War II, the U.S. Army Signal Corps. asked ASP to make air trimmers, similar to the artifact offered here. ASP air trimmers were used in military communications, radar and commercial equipment. They also controlled color hues in early color television circuits. ASP was sold to All Star Products, Incorporated in 1950.

Part Number: PHL-1430 ?? (ink-stamped on ceramic).

Capacitance: Measured range: 10 PF to 150 picofarads

Mounting: Panel mounting on about 21/32-inch centers. Two #4-36 machine screws, with washers & lock washers are included.

Construction:

Plate Geometry: half-round

Plate Radius: about 27/64-inches

Plate Spacing: about 0.015-inches

Stator Plates: 19 total

Rotor Plates: 20 total

Stator Terminals: Two (2) tinned pins.

Rotor Terminal: One tinned, solder terminal (about 1/8-inch wide by 3/4-inch long).

Rotor Adjustment: This condenser has a screwdriver slot.

Ceramic Dimensions: About 15/16-inches wide.  About 1-13/64-inches high.

Max. Depth from Panel: About 1-15/16-inches


ITEM "D1"

Manufacturer: HAMMARLUND MFG. CO., New York, U.S.A.  (Metal stamped on rear rotor plate).

Capacitance: Measured range: About 20 PF to 113 picofarads

Mounting: Panel mounting on shaft bushing. Mounting nut & lock washer are included.

Construction: This condenser may be a pre-war HAMMARLUND; and might be more properly classified as an antique. It features rugged construction with brass and bakelite components. ¼-inch brass shaft extends about ¾-inch from the mounting surface (or back of the panel). Shaft requires a collet or radio knob, secured by a set screw (not included).

Plate Geometry: half-round

Plate Radius: about 3/4-inches

Plate Spacing: about 0.030-inches

Stator Plates: 7 total

Rotor Plates: 7 total

Stator Terminals: Two (2) tinned, solder tab terminals.

Rotor Terminal: One tinned, solder tab terminal.

Rotor Adjustment: ¼-inch shaft. Buyer supplies knob.

Max. Width: About 1-15/16-inches wide over terminals.

Max. Height: About 1-7/16-inches high over terminal.

Max. Depth from Panel: About 1-5/32-inches.

(The difference between D1 and D2 is basically a difference of solder residue.  Check photos.)


ITEM "D2"

Manufacturer: HAMMARLUND MFG. CO., New York, U.S.A.  (Metal stamped on rear rotor plate).

Capacitance: Measured range: About 20 PF to 113 picofarads

Mounting: Panel mounting on shaft bushing. Mounting nut & lock washer are included.

Construction: This condenser may be a pre-war HAMMARLUND. and might be more properly classified as an antique. It features rugged construction with brass and bakelite components. ¼-inch brass shaft extends about ¾-inch from the mounting surface (or back of the panel). Shaft requires a collet or radio knob, secured by a set screw (not included).

Plate Geometry: half-round

Plate Radius: about 3/4-inches

Plate Spacing: about 0.030-inches

Stator Plates: 7 total

Rotor Plates: 7 total

Stator Terminals: Two (2) tinned, solder tab terminals.

Rotor Terminal: One tinned, solder tab terminal.

Rotor Adjustment: ¼-inch shaft. Buyer supplies knob.

Max. Width: About 1-15/16-inches wide over terminals.

Max. Height: About 1-7/16-inches high over terminal.

Max. Depth from Panel: About 1-5/32-inches.


I hope these are cool WWII artifacts that you would love to use in your vintage electronics restoration projects, or just to add to YOUR electronics collection!!

Thanks for looking here!!

(Misc 5)


P.S.  (I have many other capacitors and small electronics from this inventory, and if you would like other items, I will ship them in a combined shipping, and only charge shipping for the heaviest item, and all the other items you include will ship free.  Check out my other listings!!   Go ahead and buy the items, but DON'T PAY until I send you an invoice with the shipping reduced for you.)