I also recently replaced the Heil Proset for CM500, not because of hearing issues but better comfort in the long contests. I am not a big fan of vox, I use a foot pedal to PTT the rig. I turned on the vox just to see if I have same problem as you with CM500. I currently use front panel microphone connector with homebrew adaptor and I also currently don't use the K3 bias for the microphone, I still use the AAA battery pack that came with the headset for the bias. I played with the vox settings so the levels will be right and sensitivity of vox is correct. It is not difficult to do because the CM500 microphone is highly directional. Here are my settings at this point: MIC is 30 CMP is 20 In the Main menu: VOX GN is 010 ANTIVOX is 025
With these settings the vox works as it should. Knocking on the desk, dropping pen on the desk or normal breathing do not trip the vox. I don't know how loud are the signals you are hearing, my AF gain is at about 9 o'clock position to hear normal signals on 10m. The headset is closing the ears pretty tight, hard to believe that audio from the headphones is able to trip the vox. 73, Igor, N1YX -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mike K2MK Sent: Saturday, December 11, 2010 7:57 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Yamaha CM500 and ANTIVOX setting I decided to try the CM500 headset in place of the Elecraft Heil Proset headset. I'm always on a quest for increased volume due to age related decreased hearing. To that end I can emphatically say that the CM500 solves my low audio level problem. The CM500 in the rear headphone jack provides greater audio output then the Proset in the rear speaker jack. So far, so good. I tried the CM500 on SSB today in the 10 meter contest and had occasional VOX tripping when listening to loud signals or loud noise. I'm using the headphones and there is no speaker output. (I even held my breath to be sure my breathing wasn't tripping the VOX). I reduced the VOX GAIN to 17. Any lower and I couldn't always trip it reliably. My ANTIVOX was set at 20 for the Proset so I began to crank it up. It's up to 80 now for the CM500 and appears to have solved the problem. My other settings are: RP.L BIAS MIC GAIN = 10 for 5 to 7 ALC bars Comp = 20 for 10db CMP Has anyone else experienced this problem? 73, Mike K2MK -- View this message in context: http://elecraft.365791.n2.nabble.com/Yamaha-CM500-and-ANTIVOX-setting-tp5827 199p5827199.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
