Lectrosonics SMV User Manual download pdf (Page 15)

Super-Minature Belt Pack Transmitter

Rio Rancho, NM

Silver Paste on SM Series

Transmitter Thumbscrews

Silver paste is applied to thumbscrew threads on new

units at the factory to improve the electrical connection

from the battery compartment through the housing on

any SM Series transmitter. This applies to the standard

battery door and the battery eliminator.

Threads

provide

electrical

contact

The small enclosed vial contains a tiny amount (25 mg)

of silver conductive paste. A small speck of this paste

will improve the conductivity between the battery cover

plate thumbscrew and the case of the SM.

The tiny vial is about

1/2 inch tall and

contains 25 mg of

silver paste.

Withimprovedconductivity(lowerresistance)moreof

the battery voltage can get to the internal power sup-

plies causing reduced current drain and longer battery

life. Though the amount seems very small, it is enough

for years of use. It is, in fact, 25 times the amount that

we use on the thumbscrews at the factory.

To apply the silver paste, ﬁrst completely remove the

cover plate from the SM housing by backing the thumb-

screw completely out of the case. Use a clean, soft

cloth to clean the threads of the thumbscrew.

NOTE:DoNOTusealcoholoraliquidcleaner.

Simply hold the cloth around the threads and turn the

thumbscrew. Move to a new spot on the cloth and do it

again. Do this until the cloth remains clean. Now, clean

thethreadsinthecasebyusingadrycottonswab(Q-

tip) or equivalent. Again, clean the case threads until a

fresh cotton swab comes away clean.

Open the vial, and transfer a pinhead speck of silver

paste to the second thread from the end of the thumb-

screw. A easy way to pickup a speck of paste is to

partially unfold a paper clip and use the end of the wire

to acquire a tiny bit of paste. A toothpick will also work.

An amount that covers the end of the wire is sufﬁcient.

Apply paste to second thread

from end of thumbscrew

It is not necessary to spread the paste more than a little

bit on the thread as the paste will spread itself every

time the thumbscrew is screwed in and out of the case

during battery changes.

Do not apply the paste to any other surfaces. The cover

plate itself can be cleaned with a clean cloth by rubbing

the slightly raised rings on the plate where it contacts

the battery terminal. All you want to do is to remove any

oils or dirt on the rings. Do not abrade these surfaces

with a harsh material such as a pencil eraser, emery

paper, etc., as this will remove the conductive nickel

plating and expose the underlying aluminum, which is a

poor contact conductor.

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Lectrosonics SMV User Manual Page 15

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