AT25LSD datasheet(46/60 Pages) KNOWLES

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Microwave Tuning Elements

Description



Variable reactance for microwave circuits



Available with mounting bushing and/or individual tuning rotor



High resolution tuning



Exceeds MIL-PRF-14409 vibration requirements

Features



Self-locking torque mechanism, no lock nuts required



Gold and chromate finish



Available in metallic, dielectric and resistive versions

Applications



Combine applications



Interdigital applications



Impedance transformers



Impatt and Gunn oscillators



Microstrip and stripline circuits



Attenuators



Coaxial structures



Waveguide circuitry

Contact factory for “Microwave Product Application Guide”

brochure.

Johanson Microwave Tuning Elements with the self-locking,

constant torque drive mechanism, require no external locking

devices and permit “one hand” tuning with virtually no dynamic

tuning noise which could otherwise imperil associated solid state

devices under “power on” conditions. This self-locking feature and

high tuning resolutions assure unparalleled control over the most

critical of complex circuit tuning adjustments.

In many instances, the use of Johanson Tuning Elements has

halved technical tuning time.

Recommended Tuning Tools

Tuning

Element

Diameter

Johanson Part Number

Microwave

Type

.130

8777

Microwave

Type

.130

8764

JMC 8777

JMC 8764

Note: The use of a Johanson tuning tool is recommended, improper screw

driver size will cause internal thread damage.

Tap Part No.

Thread

(UNS-2)

Recommended

Tap Drill

7054

.086-56

#51 (.067)

7059

.156-64

9/64 (.1406)

7060

.120-80

#36 (.1065)

7061

.190-64

#17 (.173)

7062

.234-64

7/32 (.2187)

7063

.250-64

15/64 (.2344)

7064

.094-80

#45 (.082)

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