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MFJ-434 with Heil microphone

Solution
To make the 434 work with a Heil microphone:
 
The Heil mic is an electret mic and requires voltage to work. 
 
On the MFJ-434 pc board, find jumper JMP6, (located next to the PLAY/RECORD button and behind the PLAY led)
and set it to the +5V position.  This will supply +5 volts to the mic input and allow the Heil mic to work with the MFJ-434 voice keyer.
 

Thanks for your business! We appreciate your Support!
Richard C. Stubbs, Jr.
KC5NSZ

Article details
Article ID: 78
Company: MFJ
Date added: 2017-01-12 14:40:18
Views: 22

 
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