Hi John, I guess one of the questions I'd also be thinking about is whether the filter alignment (10V regulator board) is correctly adjusted. If the filter skirts are set to cut off low frequency voice tones (yours), the radio's alignment could be hurting your chances. One way to get an idea is to use the passband tuning to adjust the voices you receive until you hear low frequency response like you'd like to have. Then compare that setting by turning the passband tuning on and off. If there's a big difference, your rig might benefit from realigning the passband control pots on the 10V regulator board - after verifying that the board is putting out 10.0 VDC, with a known accurate volt meter.
73, Bob, KD7NM PS: I sent you a direct email last week, and resent it this morning, expressing interest in the 1500 Hz C-Line filter, bur didn't find a response. > _____________________________________________ > From: [email protected] > [mailto:[email protected]] On Behalf Of John Stringer > Sent: Monday, January 12, 2009 9:10 AM > To: [email protected] > Subject: [Drakelist] microphone bass boost > > My voice has virtually no bass in it and I am told my transmit signal from > my TR7 plus Drake 7077 microphone is too high pitched. Can someone help > me with a simple circuit to boost bass output from the microphone or offer > me other suggestions to solve the problem? John. GI3KDR
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