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Universal Keying Adapter 3 

05/05/2013 

Page 4 of 10 

  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. 

 

In the following steps, it is important to make sure the connectors are all fully seated against the 
circuit board, and that they are straight both horizontally and vertically.  If you are installing the 
kit in a cabinet, you may want to slide it into the cabinet to check the fit and make sure the 
connectors are properly installed (see “Cabinet Assembly” below for details).

 

  Install the coaxial power connector in the location 

marked POWER.  Be sure it is seated flush against 
the circuit board. 

 

  Install the 3.5mm stereo jack in the location 

marked INPUT.

 

  Install the RCA connector in the location marked 

OUTPUT.   

  Install the power switch in location S1.  The 

pushbutton end faces away from the center of the 
board as shown.  Push the round pushbutton switch 
cap onto the end of the actuator until it snaps into 
place, if it is not already attached. 

 

Summary of Contents for Universal Keying Adapter 3+

Page 1: ...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 Option...

Page 2: ...Use pliers clamps or alligator clips as heat sinks to prevent heat damage to parts while soldering If you are not fairly experienced with soldering small parts you may want to practice on some scrap...

Page 3: ...five 1N4148 diodes in locations D2 D3 D4 D5 and D6 Again make sure the band on one end of each diode is oriented as shown by the stripe in the part outline on the circuit board Install the 470 Ohm re...

Page 4: ...straight both horizontally and vertically If you are installing the kit in a cabinet you may want to slide it into the cabinet to check the fit and make sure the connectors are properly installed see...

Page 5: ...ions with the larger 4 pin K1 relay bend the pins 90 degrees to allow the relay to mount horizontally The pins or metallic area of the relay should not be touching any other components although the ep...

Page 6: ...the end panels upside down Carefully peel the backing from the supplied label Carefully line it up with the connectors and align it with the lower edge parallel to the edge of the cabinet end cap Atta...

Page 7: ...3V or higher to the IN HI input turns on Q1 which turns on K1 s output and keys the rig The MOSFET gate source voltage is rated for plus or minus 20 Volts maximum meaning it will easily tolerate comp...

Page 8: ...the tip of the stereo connector Ground to transmit IN HI GND High keying input same as the ring of the stereo connector A positive voltage of 3V or more will transmit P LED GND Power LED indicator out...

Page 9: ...anic just contact me replacements are not expensive Web http www HamGadgets com Email support hamgadgets com Phone 1 402 527 1000 Specifications Input power 12 to 13 8 V nominal DC or AC Input current...

Page 10: ...Universal Keying Adapter 3 05 05 2013 Page 10 of 10 PCB Layout Diagram Schematic Diagram...

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