[Elecraft] Using dynamic mic on KX-3?

[Walter Underwood]

Dang. Replace "should leave MIC BTN to PTT” with "should set MIC BTN to PTT”.

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Nov 9, 2019, at 3:42 PM, Walter Underwood <wunder at wunderwood.org> wrote:
> 
> The Elecraft Heil Proset uses an electret mic element, so it needs bias. Yours uses a dynamic element, so it does not need bias.
> 
> Your adapter from DX Engineering brings out the PTT contacts separately, so you should leave MIC BTN to PTT.
> 
> wunder
> K6WRU
> Walter Underwood
> CM87wj
> http://observer.wunderwood.org/ (my blog)
> 
>> On Nov 9, 2019, at 3:13 PM, Kevin Zembower via Elecraft <elecraft at mailman.qth.net> wrote:
>> 
>> Hello, new subscriber here. Thanks for setting up this list.
>> 
>> I'm trying to connect a Heil Pro Set Elite headphones and mic to a KX-3. I'm confused by what I'm thinking is conflicting advice. The Heil mic has a dynamic element, while the KX-3 is normally used with the MH-3 mic with an electret element requiring bias voltage. I'm using the HLN-AD-1-KX3 adapter from DXEngineering to connect them.
>> 
>> With regard to RTFM: I found the section on page 38 regarding MIC BIAS and MIC BTN. I understand that I should set MIC BIAS to OFF for the Heil headset. I think I should also set the MIC BTN to PTT, because I have a foot pedal connected to the adapter.
>> 
>> However, I'm confused by the flyer at https://ftp.elecraft.com/KX3/Manuals%20Downloads/E740174%20Proset%20for%20the%20KX3%20Rev%20A.pdf which seems to indicate that MIC BIAS should be ON, and MIC BTN OFF to disable all PTT switches. This indicates that the transmitter should be triggered only by VOX or the XMIT front panel switch.
>> 
>> And, also confusing, I found the email thread at http://elecraft.365791.n2.nabble.com/Microphone-Setup-tp7609912.html which is for the K3. I wasn't sure if this advice for the K3 could also be applied to the KX-3. In particular, the note at http://elecraft.365791.n2.nabble.com/Microphone-Setup-tp7609912p7609921.html uses a MIC SEL menu option, which doesn't seem to be available on the KX-3. It does have lots of detailed information about settings for TX EQ which I'd like to use if applicable.
>> 
>> I only have the opportunity to use the KX-3 at our club shack, about once a week, so I can't just turn to it and experiment. I'm also worried about causing permanent damage to either the radio or the headset by just trying things out.
>> 
>> Any advice to clear up my confusion? Thanks for any help and guidance.
>> 
>> -Kevin
>> KC3KZ
>> 
>> 
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