[Elecraft] mic

[Joe Subich, W4TV]

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


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? It is a complete package. Besides the amazing electret mic, the sound from the headphones helps me to enjoy the hobby more and allows me to pick out signals I would not be able to without them. I don't think you meant to, but your post came off as if we bought some snake oil.
> 
> -Kevin (KK4YEL)
> 
> No trees were killed in the sending of this message. However, a large number of electrons were terribly inconvenienced !
> 
>> On Jun 11, 2017, at 10:41, Joe Subich, W4TV <lists at subich.com> wrote:
>>
>>
>> Bob and Jim have excellent points.
>>
>> There is one advantage for the electret mic compared to a dynamic
>> mic.  Electrets are generally 26 dB "hotter" than a dynamic mic
>> and thus are much more resistant to common mode RF feedback and
>> magnetic coupling.  However, that assumes the transceiver is
>> designed for the higher input level and properly reduces gain
>> before the mic gain control.
>>
>> Mics of any kind - dynamic or condenser/electret - with wide frequency
>> response are completely wasted for amateur radio (or any communications
>> application).  You really want a clean 200 Hz - 4 Hz response.  Lower
>> frequencies cause distortion and waste power, higher frequencies are
>> simply lost in the "channel noise".
>>
>> Like Bob and Jim, I spent my professional life in the recording and
>> broadcast industries.  Amateurs waste far too much on over spec'd
>> microphones and fancy "brand name" advertising campaigns.
>>
>> 73,
>>
>>    ... Joe, W4TV
>