After speaking to Bob Heil, he recommends the Pro 7 iC. Is it possible that all 
of the bad experiences described here were with the PRO 7 with the hC7 Dynamic 
element ? Just thinking folks had the wrong mic element...

-Kevin (KK4YEL)


No trees were killed in the sending of this message. However, a large number of 
electrons were terribly inconvenienced !

> On Apr 28, 2017, at 09:27, Don Wilhelm <[email protected]> wrote:
> 
> David,
> 
> The Heil HC-7 mic element has a very low output level.  Several others have 
> had problems with it.  To make matters worse, Heil recommends that the K3 
> microphone gain range should be set to Low, when in fact it needs to be set 
> to the High Gain range.
> 
> 73,
> Don W3FPR
> 
>> On 4/28/2017 8:30 AM, David Wall-NA4AE wrote:
>>  I recently tried to use a Heil Pro 7 (HC-7) element with my KX3.  Also, 
>> with the Heil adapter cable AD-1-KX3.  Re adjusted the Mic Bias (off) and 
>> Mic Btn (off).  Had very poor results.  Could not get the "Echo" out and a 
>> basic noise.  Tested extensively using another KX3 and a K3 as the test 
>> receiver.  We truly went thru a series of test changing CMP, and EQ. Yes we 
>> even cut the MON off.  Could not get the problems corrected with settings.  
>> Sent it back to Heil and they tested it and said it was OK.  Being the good 
>> company that they are, they sent me a new system.  It did the same thing. 
>> So, I gave up and took it back to HRO.  They refunded me with no problem.  I 
>> then ordered a Heil "ProSet-ic" set up for the KX3 from Elecraft. So far it 
>> seems to work fine.  I don't know what the problem is that the Pro-7 (HC-7) 
>> wouldn't work with the KX3, but there is something that is not compatible 
>> with the HC-7 element.  I would have liked to have had a Pro-7 rather than 
>> the ProSet, b
> ut
>>  I couldn't get to work.  The Heil AD-1-KX3 cable is what you need to adapt 
>> the headset to the radio with a PL-59 (1/4")connection for a PTT switch 
>> (foot,hand etc). also has the TRR plug for the Mic connection.
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