User Manual for Switchcraft 3-Conductor 1 4" Long-Frame Telephone Twin Jack Click to enlarge the picture
Contents of the user manual for the Switchcraft 3-Conductor 1 4" Long-Frame Telephone
- Product category: Audio Connectors Switchcraft
- Brand: Switchcraft
- Description and content of package
- Technical information and basic settings
- Frequently asked questions – FAQ
- Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
- Authorized service for Switchcraft Audio Connectors
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User manual for the Switchcraft 3-Conductor 1 4" Long-Frame Telephone contain basic instructions
that need to be followed during installation and operation.
Before starting your appliance, the user manual should be read through carefully.
Follow all the safety instructions and warnings, and be guided by the given recommendations.
User manual is an integral part of any Switchcraft product,
and if it is sold or transferred, they should be handed over jointly with the product.
Following the instructions for use is an essential prerequisite for protecting
health and property during use, as well as recognition of liability on the part of the manufacturer
for possible defects should you make a warranty claim. Download an official Switchcraft user manual in which you will find instructions on how to install, use, maintain and service your product.
And do not forget – unsuitable use of a Switchcraft product will considerably shorten its lifespan!
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Product description The Switchcraft 3-Conductor 1/4" Long-Frame Telephone Twin Jack has both the tip and ring circuits interconnected (crossover wired), so if a plug is inserted in either jack, common circuits are opened. It is used in Switchcraft Series 2400, 2600, and JP Jack Panels and other standard jack panels. The jack's solder lugs are equivalent to WEco 482A and the jack is adjusted for WEco type 310 (MIL types M642/2-1 and M642/2-2) plugs. Note: Mounting screws (#6-32) are not included. In the Box Switchcraft 3-Conductor 1/4" Long-Frame Telephone Twin Jack Limited Lifetime Warranty Table of Contents
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Technical parametersSwitchcraft MT389 Specs | | | Frame | Frame and Stack Screws: Steel, plated with iridescent iridite finish | | Springs | Copper alloy, spring tempered
Solder lugs are solder coated | | Bushing | Nickel-plated copper alloy | | Contacts | Welded crossbar palladium in shunt circuits | | Insulation | Rigid plastic (MIL-type PBE-P, per MIL Specification LP-513C)
Extruded plastic insulating tubing through stack | | | | Contact Resistance | 10-MOhm maximum (initial), 20-MOhm maximum (after life), 100-MOhm maximum (after salt spray) | | Insulation Resistance | 10,000-MOhm minimum (initial), 1,000-MOhm minimum (after humidity, durability exposure) | | Dielectric Withstanding Voltage Test | 500 VAC, 60 Hz (rms) | | | | Temperature Range | Operating: -40 to 149°F (-40 to 65°C)
Non-Operating: -67 to 185°F (-55 to 85°C) | | Shock Resistance | Thermal: Per MIL-STD-202, method 107 | | Humidity | 0 to 95% operating/non-operating | | Salt Spray | Per MIL-STD-202, method 101 (48 hours) | | Moisture Resistance | MIL-STD-202, method 106 (240 hours) | | Certification | UL recognized | | | | Number of Conductors | 3 | | Compatibility | Adjusted for WEco type 310 MIL types M642/2-1 and M642/2-2 plugs | | Life Expectancy | 20,000 insertion/withdrawal cycles, minimum | | Shock | Per MIL-STD-202, method 213, Test Condition H (75 g) | | Vibration | Per MIL-STD-202, method 213, (10 to 55 Hz) | | Mounting | Frame mounting ears are on 1.375" (34.9 mm) centers
Bushings are on 0.625" (15.9 mm) centers |
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