[Elecraft] Microphone preamp and Heils

[David Wilburn]

Never did get a clear answer on this.  If I wire the K2 up for the 
Kenwood, and I have a Heil Pro Headset with the Kenwood adapter, I will 
be good to go?

Curious, why did they stop making the Elecraft associated mike?  Was it 
plastic or metal?

David Wilburn
dave.wilburn at verizon.net



David Wilburn wrote:
> Just curious of why the focus on the ICOM mikes?  When I looked at the 
> drawing for the pins on the front panel, it looked like the Kenwood was 
> the least complicated to wire.
> 
> A bit off topic, the Heil website does not show the hand mikes anymore. 
>  Well not a 'real' hand mike that sits and your hand as something 
> rugged.  They have these little microphone mikes.  Not something that 
> I'm interested in connecting to any of my radios.  If I want a hands 
> free setup, I'll use a headset and boom.  Bar that, if I want to talk on 
> a mike and listen via the speaker, I want a substantial mike that feels 
> like I have something in my hand.
> 
> My current plan is to wire my K2 up for the Kenwood microphone.  My 
> other radio is a TS-570.  The assumption on my part, is that I will then 
> be able to use my Heil headset on both the Kenwood and the K2.  Is this 
> a valid assumption?
> 
> David Wilburn
> dave.wilburn at verizon.net
> 
> 
> 
> Don Wilhelm wrote:
>> The Heil microphone preamps are required for the Heil microphones 
>> using the
>> HC4 and HC5 elements.  The electret elements do not need a preamp (but 
>> they
>> do need a resistor at the mic jack).  The Heil mics designated for use 
>> with
>> Icom transceivers are usually of the electret typw and work quite well 
>> with
>> the K2.
>>
>> Remember that Heil has a wide variety of mics, just saying that you are
>> using a Heil mic is not sufficient information, one must specify WHICH 
>> Heil
>> mics - they are not created equal.  I guess an anology is that you 
>> would not
>> refer to an automobile as a General Motors car - you must specify if 
>> it is a
>> Chevrolet, a Buick, a Cadillac, etc., and in many cases one must also
>> specify which variety of Chevrolet, Buick, etc.  Heil mics are much like
>> that.
>>
>> So, yes choose the Icom mics if possible, but if you prefer those with 
>> the
>> HC4 or HC5 elements (those elemetns have low ouput), you should plan 
>> to add
>> a mic preamp.  As far as I know, no PC boards or kits are available 
>> for the
>> mic preamps.
>>
>> 73,
>> Don W3FPR
>>
>>> -----Original Message-----
>>>
>>> Hi, sorry if this repeats previous information request, but I did
>>> a lot of
>>> searching and didn't find anything directly on point (even though
>>> there were
>>> several threads on preamps and Heils, etc.)
>>>
>>>
>>> I downloaded the Microphone Pre-Amp for Heil  schematic on the Elecraft
>>> website.
>>>
>>> My questions are:
>>> 1.  Does anybody make a PCB for this  project?  I imagine all
>>> these parts are
>>> available from Radio Shack  or Mouser?
>>>
>>> 2.  Does the preamp make the microphones  work really well, or is it 
>>> just
>>> something that "gets you  by?"
>>>
>>> 3.  As far as Heil microphone modules go,  if I build the preamp,
>>> and want to
>>> buy the Classic, can I use any module, like  the Pro, HC-5, HC-4,
>>> etc., or
>>> should I get the ICOM only module, which I believe  is an
>>> electret module.  I am
>>> a bit confused about all this.  I asked  Elecraft and they said I
>>> should get
>>> the electret module.  Bob Heil said the  Classic was not a good
>>> choice for the
>>> K2 and he suggested his iCM mic for  ICOM.  Doesn't the iCM mic
>>> have the same
>>> electret element  that the Classic with the  IC element has?  If
>>> all I needed
>>> was  an electret element, do I need the preamp at all, or does it
>>> make the
>>> electret  work even better?
>>>
>>> 4.  Once I build the preamp, is it  something that I can tuck into the
>>> microphone itself (like a Heil Classic) or  does it go inside the
>>> K2 or do I need to
>>> put it into it's own little  enclosure.
>>>
>>> Thanks for your help.  I am a new ham, and  am trying to sort through 
>>> all
>>> this stuff.
>>> Christ Kacoyannakis
>>> K4CMK
>>>
>>>
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