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Pacific Antenna Electret Microphone Kit
Parts Included:
1 –1/2" x 4" long Blue PEX tube
1 – 5/8" I.D. vinyl tube cap
1 – Foam microphone cover
1 – 4-40 brass nut
1 – 4-40 x 1/2" long flat head s.s. screw
1 – #4 x 1/16" thick nylon washer
1 – S1, pushbutton switch
1 – Electret microphone element
1 – 2 cond. shielded wire, with molded 3.5mm stereo plug
1 – C1, .001uF capacitor
1 – 1/4w resistor, any value, only the wire is used –
1 – PCB
Specifications:
Sensitivity: 44±(0dB=1V/Pa,1KHZ)
Output impedance: 2.2KΩ(Max)
Frequency Range: ~70-20KHz
Operating Voltage: 3 V
Current Consumption: 0.5mA(Max)
Assembly
ElectretMic20180125
1
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Summary of Contents for Pacific Antenna Electret Series
- Page 1 Pacific Antenna Electret Microphone Kit Parts Included: 1 –1/2” x 4” long Blue PEX tube 1 – 5/8” I.D. vinyl tube cap 1 – Foam microphone cover 1 – 4-40 brass nut 1 – 4-40 x 1/2” long flat head s.s. screw 1 –...
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Page 2: Connect The Cable
Prepare the tube: Print out the drill template found on the last page of this manual set to full size or 100% on your printer. Verify that the template is 4 inches (101.6mm) long. If not adjust your printer scaling so that it is 4 inches when printed. -
Page 3: Wiring Check
Prepare the vinyl cap by creating a hole in the center for the cable to pass through. This can be done with a punch, or other tool or by melding carefully with a soldering iron tip. The hole needs to be approximately 1/8 inch for the cable. - Page 4 Check the connections at the 3.5mm plug. You should see continuity between the connector base and the connection chosen for PTT when you press the switch. You should also see approximately 1.5K ohms from the base to the connection used for the Microphone. Assemble the Microphone: Insert the circuit board into the microphone tube as shown below.
- Page 5 To finish the microphone, install the included sponge foam microphone cover on the end of the tube where the microphone element is located. Congratulations, your microphone is now complete! Using the microphone: Electret microphones need a voltage bias to operate. This is supplied through the MIC+ lead either from your radio or an external supply.
- Page 6 Drilling Template The template should be 4 inches when printed. If not, adjust the output size for your printer until it is correct. Drill template ElectretMic20180125...