[Elecraft] mic - David Clark

[Randy Farmer]

This thread has drifted into a discussion of headsets, so I'll throw in 
my 2 cents worth and QRT. I realize they're pricey, but I use and love 
the Radiosport headsets. I have both a RS-60CF headset with the electret 
mic element and a RS-20 receive-only headset. When properly adjusted 
both are extremely comfortable -- they're the only phones I've ever used 
that I can wear for a full contest weekend over my glasses with no 
problem whatsoever. They're NOT hi-fi phones; my understanding is that 
they were originally designed for auto racing pit communications, and 
the transducers are tailored for voice communication. They also have 
superb isolation from outside noise, somewhere around 28 dB. I can't 
hear the phone on my radio desk ring when I have them on. I also have a 
Yamaha CM-500 set, and the Radiosports blow them away, as well they 
should at almost 5X the price. For me, the substantial price difference 
is worth every cent. YMMV.

73...
Randy, W8FN

On 6/11/2017 8:32 PM, John Severyn wrote:
> Hi Fred,
> Aviation headsets come with a variety of mikes, some dynamic, but most
> today are electret.  "Noise Cancelling" in aviation lingo usually means
> some sort of seal over or in the ear.  "Electronic Noise Cancelling"
> means the earpieces have active noise cancelling circuitry in addition
> to the ear-seal.  (the seal can be over the ear or in the ear, like a
> hearing aid, but most David Clark models are "over the ear").  The
> microphone is also most probably of a noise cancelling design.
>
> The David Clark line is considered to be fairly high quality and has
> been around for a long time, since 1941.  They make a wide variety of
> gear, from G-suits, high altitude pressure suits, helmets, headsets etc.
>
> http://www.davidclarkcompany.com/aviation/fixed-wing-passive.php
>
> Various connectors are available, from LEMO to larger phone jacks and
> some specialized models.
>
> The above link is for their present line of fixed wing headsets.  I have
> several pairs of older H10-40 units, no longer made.  The mike is a
> electret with very good noise cancelling and made to perform in a very
> high noise environment, with passive noise reduction, over the ear
> seals.  Fidelity is not the goal.  Voice communication in a very high
> noise environment of a piston engine propellor aircraft is the goal.
>
> Other models are made for helicopter use (different connector became
> standard in helicopters).
>
> No connection to David Clark.  Just a satisfied customer.
>
> 73
> John AF6QO
>
> On 6/11/2017 2:44 PM, Fred Jensen wrote:
>> Hmmm ... I've had it for several years and it saw some use before I got
>> it but I doubt it's old enough to be a carbon mic like the WW2 T-17.
>>
>> I just assumed the "noise cancelling" part applied to the headphones.  I
>> didn't know it might apply to the mic.  There's no external noise in my
>> shack to cancel anyway.
>>
>> The connector is round and the contacts stick out of the face.  I think
>> there are 6, maybe Headphones, Mic, and PTT?  There's a push-switch in
>> the cable.  It looks like the connector fits over the panel connector
>> and you twist is to lock it ... like a BNC.  I don't think the
>> headphones are stereo which is a big negative with my K3.
>>
>> I was just curious.  This sounds like a project for some time when I
>> have exactly nothing else to do. [:-)  Thanks for the info
>>
>> 73,
>>
>> Fred ["Skip"] K6DGW
>> Sparks NV DM09dn
>> Washoe County
>>
>> On 6/11/17 1:51 PM, Jack Spitznagel wrote:
>>> Fred,
>>>
>>> I have a widget that adapts a Sennheiser S1 av-noise canceler to my
>>> KX3. Use it for hi noise situations and it works like charm, even
>>> Massey-Ferguson mobile.🙂
>>> Try it with the David Clarks.
>>> Was connector a mismatched size pair of phone jacks or a complex
>>> military looking connector?
>>>
>>> Jack -KD4IZ
>>>
>>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to severyn46 at hotmail.com
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w8fn at tx.rr.com