I believe that the microphone can be wired differently to operated on the TR-7. However, if my memory serves me correctly, the second mike input is for Low OUTPUT microphones (The manual does not use the term "Lo-Z or Hi-Z impedance" for the input wiring).
The use of the HC-5 should be OK. The sound of the new cartridge is, in many respects, a product of the cartridge and its environment. If you remove filters in front of the cartridge and support the cartridge with cotton, the hollowness should dissappear.
The microphone gain problem may be a product of your voice characteristics or at worse, a problem with the rig.
GL es 73,
Jay/AF2C
At 05:40 AM 1/3/05 -0600, you wrote:
I love my TR7 SN 7398 and use it quite a bit. I replaced the muddy sounding cartridge in the 7077 mike with a Heil HC-5 element and reports on audio quality are much better now. I was surprised that the output of the mike did not improve. I still need to run the mike gain at about 3 o’clock to light the ALC led and get full output on SSB. Since the HC-5 is low impedance I wired it through the transformer in the 7077 so it would match the stock high impedance input of the TR7. Is it possible to wire the mike a different way to increase output? I have heard that later TR7 models have a second low impendence mike input and maybe that would solve my mike gain problem?
----- Original Message -----
From: Bill Carpenter
To: [EMAIL PROTECTED]
Sent: Sunday, January 02, 2005 8:52 PM
Subject: TR7 Mike Gain
Thanks and 73,
Bill NZ0T
