To: | writelog@contesting.com |
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Subject: | [WriteLog] Heil proset plus ic and IC756 pro II |
From: | Jerry Pixton <jpixton@shentel.net> |
Date: | Fri, 12 Nov 2004 13:26:03 +0000 |
List-post: | <mailto:writelog@contesting.com> |
All Icom owners, I have always had trouble with weak audio when I started routing my microphone (Heil with hc4 dx element) through the sound board for writelog to send to the proper radio. I have gotten by on my FT1000mp but it was never satisfying on the IC756 Pro II. I even built a mike preamp which I used for a while. But in switching computers I left it out. Finally it occured to me that when I was trying to break a dx pile up on voice I would always try for a while on the IC756 Pro II and then revert over to the FT1000mp (and usually get through then). The new Heil Proset Plus IC headset has both an electret microphone for Icom as well as the hc4 dx mic element with a tiny switch. After checking the headset directly to the radio, I had enough audio to fully drive the ALC level and the Compression to recommended levels - the old mike would just budge the ALC with full mic gain. So I made a adaptor cable from a mono extension cable with 1/8" mono male/female connectors. Cut off the male end and replaced it with a stereo plug to go into the sound board. Sound boards put a voltage (my new turtle beach measures 4 volts, while the Icom puts 7 volts on the mic pin) on the Ring while the mic input is on the Tip. I connected the adapter cable center wire to the ring (to feed the voltage to the electret element) and then put a 1 microfarad cap between Ring and Tip to feed the audio to the sound board. Works like a champ. I have plenty of audio with the sound board controls in mid range instead of maxed out. I re-recorded all of my numbers, letters plus some number of wave files to use for SS yesterday. Still have to trim more off the letter wave files - callsigns are sounded out somewhat slow. I left some leading and trailing silence but it is too much still. I am using Goldwave to trim the sound files. Try it, you will like it Jerry, W6IHG ------------------------------------------ Dr. Jerry R. Pixton, PIXOS Designs LLC http://www.pixos.com/designs/RadioTuner/ jpixton@shentel.net ------------------------------------------
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