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Title: Unamplified D-104 low Frequency Tip Post by: n8fvj on August 11, 2023, 10:00:43 AM The D-104 unamplified mic that is used a lot on vintage gear cannot produce low bass unless it sees 3.3meg ohm load. Most vintage transmitters use 1 meg ohm on tube grid to ground. Change to 3.3 meg ohm. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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