To: | tentec@contesting.com |
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Subject: | Re: [TenTec] Heil ProSet adapter with Orion -- hum |
From: | Bruce Small <bsmall@adelphia.net> |
Reply-to: | tentec@contesting.com |
Date: | Wed, 23 Jun 2004 23:31:40 -0400 |
List-post: | <mailto:tentec@contesting.com> |
Duane: I ran into the same problem with my ProSet that you did, and learned by trial and (much) error that figure 2-5 in the Orion manual is to be taken literally. The Mic ground and the shield must remain separate, or else you get distorted audio. I know the "whine" you wrote about as well - on Hamalyzer it looks like three harmonically-related tones at approximately 880 Hz, 1760 Hz, and 2640 Hz +/-. The Heil adapter cables tie together the shield and Mic ground. If you disconnect the microphone but leave the adapter connected to the Mic jack, activate PTT and you can still hear these tones. In the end I made up my own adapter cable, using two conductors for the microphone and one conductor plus the shield for PTT, just like figure 2-5. After an evening of cutting, soldering, and cussing, operation is just what it is supposed to be. 73, Bruce KM2L Duane A Calvin wrote: Here's a quick report on what I found. By taking pin 2 to the connector case (pin 1 is mic, pin 2 is shield), the audio gets becomes distorted - buzzy.. Turning on the speech processor, even on just "1" the audio picks up an additional buzz almost like my voice was bouncing off a big metal sheet. Very odd. Master reset (just for grins) was no help. If I use the TT 706 mic, or their hand mic, there is no problem, and the audio sounds fine. So, it's something in the Heil setup, but I'm not sure what yet.
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