[1000mp] Microphone/audio

[Bob Hughes]

For those who have interest--------

This post is not in response to any specific query. It is for informational
purposes only.

The mike setup and audio menu settings can be tailored for your voice
profile. In my case, I use a Goldline which feeds a Behringer MX602A
mixer/EQ (can be had at most music/guitar shops for  $85.00) which feeds my
Mark5. I set 4-4 for off, 5-9 at 2.4kHz (sometimes at 6.0kHz for audio
testing), 7-7 at 100-3100 and 8-9 at -200hz. I almost never run the
processor. I use the Wire-Man current baluns in about 5 locations in the
shack and at the Quad feed point. This helps to keep any RF feeding back
into the shack via the coax shield. I also feed the Goldline into the MX602A
with a brade/foil shielded microphone cable via a 1/4 inch plug. I keep all
leads as short as possible. I also use some clamp-on ferrite filters. My
chicken wire mesh ground grid pulls most all the RF that floats in the
shack. All this results in fairly clean audio to the antenna when running
the limit. I taylor my audio via the MX602A EQ by dummy load and on the air
testing with other stations. For some reason, the audio always sounds a bit
cleaner into the dummy load vs on the air when listening via the Mark5
monitor. I keep my Mark5 audio gain at about 9 o'clock. All this sounds like
a bit much but as I stated earlier the setup and quality of your station
audio depends on several items including your voice characteristics.

There is a page on Bob Heil's web site that discusses the necessity to run a
ground wire from the floating ground to chassis ground at the mike input
connector. He describes how to make the simple mod on his web site. I made
the mod on my Mark5 when I started using my Goldline. The mod eliminated an
AC hum condition I incurred when I installed the MX602A. ------ FYI


Bob
W7SNR