2139 datasheet(14/60 Pages) ABBATRON

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Binding Post Information

A binding post is a versatile connector that allows a temporary

or semi-permanent connection between electronic devices

or circuits.

Construction Features:

The contact surface clamp washer, against which the wire

or lug is clamped by the head, is an integral part of the stud

and not a force-fitted separate washer. This avoids possible

electrolytic corrosion across the mating faces due to current

through the interface and subsequent increase in noise,

galvanic EMF and resistance. The cross-hole is drilled at

right angles to a key-flat on the clamp washer in the screw

machine, assuring absolute angular alignment of the finished

post to the keyed flat in the instrument panel. Press-on base

washers can have as much as five or ten degrees of angular

misalignment.

The behind-panel backup insulating washer is made of solid

plastic, which reduces cost and increases insulation from

flashover voltage of the post.

Aflat metal washer is provided as a bearing surface for the nut

against the backup washer. This washer can be used without

the insulating backup washer, if it is desired, to ground the

post to the panel.

All posts are shipped individually and unassembled in a

sealed bag. This maintains the integrity of the part set, and

also does away with the need to disassemble the post before

assembling it on the panel.

Connection Options:

1. Top insertion of banana plug.

2. Alligator clip inserted through top jack hole.

3. Spade lug positioned over stud and fastened by tightening

the head.

4. Wire inserted through cross hole and held by head.

5. Standard .080" phone tip can be inserted in cross hole

and held by head.

6. Wire wrapped around stud and fastened by tightening head.

Finishes:

MIL-Spec and certain other posts are supplied in gold plate in ac-

cordance with the requirements of the specifications. In all instances

where gold is plated on brass, a barrier of Nickel is provided to prevent

migration.

Excellent appearance and solderability are also provided by pure tin

plating on alternative versions of these posts, with lower cost. This

is a bright, acid tin, 99% pure, and NOT a solder plating.

Where solderability of the post is not a requirement, bright nickel

plating is provided for maximum corrosion protection.

Plastic parts are provided with a low-luster, semi-matte finish

for a modern appearance on contemporary instruments.

Material Specifications:

All binding posts are machined from solid brass.

Mounting nuts and washers are also brass.

•

Brass: Free-matching leaded brass, per

QQ-B-626, Comp. 360, 1/2 hard.

•

Gold:

Gold plated, per MIL-G-45201, 5

micro-inch over 50 micro-inch hard

nickel strike.

•

Nickel: Nickel plate, per QQ-N-290, 200

micro-inch.

•

Tin:

Tin plate, per MIL-T-10727, 200

micro-inch Bright Acid Tin.

TABLE A

BINDING POST RATINGS

All current ratings are 60 Hz RMS and are for 10oC temperature

rise over ambient, long term. Voltage ratings are 60 Hz at sea

level. Capacitance is to a 1/8” aluminum panel, component

mounted as recommended. All ratings are working and do not

represent maximum values.

STUD SIZE

CURRENT

VOLTAGE

CAPACITANCE

5 AMPS

1 KV

2.5 pF

15 AMPS

1 KV

3 pF

15 AMPS

1 KV

4.5 pF

#10

30 AMPS

2 KV

5 pF

HH Smith

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