Microphone Recommendation

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I  recently purchased a Flex 6300 and I'm looking for recommendations from others as to the best microphone to use.  I have tried the Heil PR-40 but have had mixed reports.  I have had a few folks tell me that the Heil PR-781 was the way to go.  Would like more input so your responses would be most helpful.

TNX and 73
Al
W1JHU
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Al Reeves

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Posted 3 years ago

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Ken - NM9P

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If you already have a PR-40, I would see no advantage in moving to a PR-781. What is needed is some time spent perfecting your Mic Profiles - gain level, filter passband, PROC and TX EQ, etc.

The Default Profiles for any of the Microphones is only a starting place.

Check out my tutorials on transmit audio on YouTube.
YouTube.com/NM9P

A little work with these controls will be rewarded immensely .

Ken - NM9P
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Andrew O'Brien

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I would echo Ken's suggestion.  I have a Heil Gold Elite with my Flex 6300 and was not getting many great comments (not a lot of bad comments either ).  Then I spent some time learning how to tailor the audio and listen to it back.  Then I started to get unsolicited positive comments on the HF bands. 
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Doug - K3TZR

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Ken,

The you tube videos are a great help, thanks for taking the time to make them.

Have you ever tried your procedure using a mic and headphones connected to a PC (i.e. using Opus). I gave it a try but there is an echo and a great deal of some sort of noise. If I turn down the mic gain the noise goes away (along with the voice of course). I can’t figure out what is causing the noise and the echo.
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Ken - NM9P

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I have successfully used it via Smart Link remote on my office desktop and a computer headset mic. Also via lan WiFi on my laptop at home.

The DownwardExpander (DEXP) doesn’t work via remote/PC Mic input, so that may allow more noise. I’m not sure whether the noise you are hearing is from too high RF gain on your monitoring slice, or two high Mic gain.

I have noticed that I need to be extra careful not to drive the mic too hard when in remote mode or when using PC Mic input. And make sure you aren’t getting the mic playing back through the computer speaker/headphones via the sound card interface, and not just the Flex Radio receiver.

Also, make sure your PC internal settings aren’t doing any unexpected processing before it goes to the rig.

You will definitely have more latency via the pc and or remote setup. This may also make it sound like more echo.

Good luck.

Ken - NM9P
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Doug - K3TZR

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Ken,

Thanks for the instant reply. I've done some additional experimenting and your suspicion about the levels was correct. It takes some experimenting with the mic level in the PC as well as the level in SmartSDR to get to workable settings.

I've also discovered that turning on the Processor immediately brings up the noise, I'm guessing it's raising the gain and picking up the ambient noise. As you indicated, the Downward expander is automatically disabled when the Mic source is PC so maybe it prevents this sort of thing when using a "local" mic.

I'm working on a Mac-based SmartSDR-like app and your techniques allowed me to prove that my Opus Tx implementation is working. Thanks again for sharing your technique, it was very helpful.

73's - Doug
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Ken - NM9P

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Thanks for the positive feedback.  
Indeed, when working with a local mic connection, the DEXP, when carefully adjusted, is very effective in limiting the background noise.  I use it all the time in my shack.

Good luck in your programming.  I long to learn C# and do some myself ... after I retire.....

Ken - NM9P