This video shows how I modified the Astatic D104 microphone and added a JFET source follower circuit to it with a 9V battery. Its a pretty easy mod. I also use a phase switch. I highly recommend using this circuit for the D104. I prefer the source follower rather than a common source type circuit as the D104 mic already has a high audio output and presents a high Z .to the TX speech amp. I have used this circuit in this mic and it has been running for about 5 years with no issues on various transmitters.
Showing posts with label D104 Microphone Source Follower. Show all posts
Showing posts with label D104 Microphone Source Follower. Show all posts
D104 Microphone Source Follower
This video shows how I modified the Astatic D104 microphone and added a JFET source follower circuit to it with a 9V battery. Its a pretty easy mod. I also use a phase switch. I highly recommend using this circuit for the D104. I prefer the source follower rather than a common source type circuit as the D104 mic already has a high audio output and presents a high Z .to the TX speech amp. I have used this circuit in this mic and it has been running for about 5 years with no issues on various transmitters.
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