[Elecraft] mic

[Matt Zilmer]

It might work, Fred.  Check this page: 
http://www.acousticom.com/2015/aviation-headset-information-specs/

I always thought that aviation headsets met some earlier mic standard 
(carbon?), but this page says that's not right.  Note that the actual 
headset speakers/transducrers have a rather high impedance, though I 
suspect they may work with a K3S anyway.

Someone else can chime on a load of 300 ohms using the K3S's headphone 
driver circuit. My DCs are way too buried to find and check this right now.

73,

matt W6NIA

On 6/11/2017 1:29 PM, Fred Jensen wrote:
> Just curious ... I inherited a David Clark noise cancelling aviation 
> headset/mic from a neighbor who was a US Forest Service pilot.  I've 
> never tried it, the connector is strange.  I'm not even sure I know 
> where it is right now.  Will it work with my K3 if I can find it and 
> get the connector compatible?  I know they're expensive.
>
> Maybe it will cancel the powerline noise on 80? [:-))
>
> 73,
>
> Fred ["Skip"] K6DGW
> Sparks NV DM09dn
> Washoe County
>
> On 6/11/17 12:55 PM, Joe Subich, W4TV wrote:
>>
>> On 6/11/2017 2:45 PM, kevino z wrote:
>>> Although headsets like my Heil Pro 7 may be more money, am I really
>>> "wasting" money on buying a "fancy brand name"  considering the
>>> unit consists of mic and incredible speakers?
>>
>> Yes, at about $250 retail (plus adapter cable), the Pro 7 is more than
>> five times as expensive as the Yamaha CM-500 (electret mic), Koss SB40
>> (dynamic mic) or SB45 (electret mic) headsets.   Both the Yamaha and
>> Koss headsets have outstanding 120 Ohm headset drivers with sensitivity
>> rated at 96dB/mW and microphones well tailored for voice work. Heil
>> does not even publish the impedance or sensitivity for their headset
>> drivers!
>>
>> For the price of a Heil Pro 7 one could get a Broadcast headset like
>> the Audio Technica BPHS1 ($199), Sennheiser HMD280 ($249) or Shure
>> BRH440M ($249) - all of which are significantly higher quality than
>> the Pro7 (and field proven).
>>
>> 73,
>>
>>    ... Joe, W4TV
>
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-- 
"A delay is better than a disaster."
-- unknown

Matt Zilmer, W6NIA
[Shiraz]