That preamp (which never worked real well) has been out of production for a
long time. The Goldline mic. was never designed for the older Icoms. I
think you're honked. Drop a line to Bob Heil at Heil.com. He'll give you
the straight skinny. I believe there is actually a lot of valuable
information you might want to look at, on his website www.heilsound.com

Van,
KL7TDZ
"Hamguy" wrote in message
...
Heil makes an inline preamp specifically for your problem.
Maybe snoop around their website a little.
http://www.heilsound.com/amateur/default.htm



"Larry Gagnon" wrote in message
news
I recently purchased a slightly used Heil Goldline GM-5 microphone,
attempting to use it with an ICOM 735 transceiver. I have read Heil's
web page about the Icom 735 -15dB down on its internal microphone
preamplifier compared to many other radios.

I can only get the GM-5 to drive my IC-735 effectively if the MIC GAIN is
100% open and the COMP LEVEL is up as HIGH as possible. I am getting very
good audio reports compared to the default ICOM HM-12 handheld
microphone,
but the Heil GM-5 is not driving the rig very hard and power output is
quite reduced compared to the HM-12 mic. Has anyone out there had a
similar experience and if so any suggestions on what I might do to
improve the driving ability of either the rig or the Heil GM-5?

Larry Gagnon VE7EA

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