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Universal Keying Adapter 3+
The Universal Keying Adapter Version 3+ kit will allow you to key nearly any
transmitter or transceiver with a straight key, electronic keyer, computer serial or parallel
port or nearly any positive or negative logic signal. It can also be used as a rig-to-
amplifier interface. Active-low and active-high inputs are provided for use with a
straight key, bug, electronic keyer, transmitter or transceiver's amp output as well as
computer control by either serial or parallel port.
Features of the UKA-3 Kit
Keys solid state, grid block or cathode keyed transmitters or
transceivers up to 400 V DC
Current capacity of 240 mA, AC or DC
Optional high-voltage/high-current relay available
Optical isolation between rig and key input
Works with any electronic keyer, bug or straight key
Computer input for use with contest software
Connects to computer parallel or serial port
Self contained with provision for AC or DC power
LED indicators show power on and keying active states
Compact size, good for integration into other equipment
On board header connection for custom applications or enclosures
Available with or without custom aluminum enclosure
Universal Keying Adapter 3
05/05/2013
Page 1 of 10
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Summary of Contents for HamGadgets Universal Keying Adapter 3+
- Page 1 Universal Keying Adapter 3+ The Universal Keying Adapter Version 3+ kit will allow you to key nearly any transmitter or transceiver with a straight key, electronic keyer, computer serial or parallel port or nearly any positive or negative logic signal. It can also be used as a rig-to- amplifier interface.
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Page 2: Parts List
Parts List Part Name Part Description Optically isolated, MOSFET Solid-State Relay (6-pin DIP or SMT package) NOTE: May be 4-pin inline with high voltage/current option 2N7000 MOSFET 10 or 100 µF, 16V electrolytic capacitor 470 Ohm ¼ W resistor (Yellow-Violet-Brown) 220 Ohm ¼... - Page 3 □ Install the 1N4732A Zener diode in location D1. If you can’t read the part number on the diode, D1 is larger of the glass bodied diodes. Be sure to correctly orient D1 so that the band on one end of D1 is on the same end as the stripe on the board.
- Page 4 □ Install the electrolytic capacitor (this part may be 10 or 100 µF) in the location marked C1. Make sure the capacitor is oriented properly, with the positive (longer) lead on the side marked “+”. Before trimming the leads, tilt the capacitor toward the center of the board as shown so it will clear the top of the cabinet later.
- Page 5 □ Install the LED indicator block in the location marked LED. Be sure to orient the part so that the red LED lenses face toward the end of the board. These will overhang the end of the board and fit through holes in the end panel of the cabinet (if you are installing in a cabinet).
- Page 6 The cabinet end panels are installed using two flat head screws on each end. If you find that the connectors don’t line up with the holes, you may have the board in the wrong slot OR you may have the end panels upside down. Carefully peel the backing from the supplied label.
- Page 7 Using the UKA-3 The Active-Low input is on the tip of the 3.5mm stereo jack. It is used for most straight keys, bugs, electronic keyers, amplifier keying relays or transistors, foot switches, etc. It is in series between the input side of the solid-state relay and ground. Shorting the ACTIVE-LOW input activates the output of the solid state relay K1, keying the attached transmitter or transceiver.
- Page 8 Using JP1 You can build your UKA-3 into your own equipment, or in a custom enclosure if you wish. The JP1 connector can be used to connect to your equipment without using the connectors. Connections should be made as follows: JP1 Pin Function PWR+ / GND...
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Page 9: Warranty
Support Should you need support, have questions, have feature requests or bug/problem reports, please feel free to contact me via email at n0xas@HamGadgets.com. I will make every effort to respond as quickly as possible. Warranty All parts in your kit are guaranteed against defects for one year from date of purchase. This warranty does not cover damage due to incorrect assembly, improper soldering or wiring, overvoltage, static damage or other misuse or abuse. - Page 10 PCB Layout Diagram Schematic Diagram Universal Keying Adapter 3 05/05/2013 Page 10 of 10...