[Elecraft] Heil Headset HC-5

[David Wilburn]

Ok, I was trying to stay away from a pre-amp.  What setup does the 
Elecraft pro headset have, and how would it have to be wired in relation 
to the use of the MH2?

David Wilburn
dave.wilburn at verizon.net
K4DGW
K2 #5982


Don Wilhelm wrote:
> Dave,
> 
> Since your plan is to use both the MH2 and the Heil headset with the 
> HC-5 element, I strongly recommend that you jumper the K2 mic 
> configuration header for the MH2 - all pins jumpered straight across 
> (use the little configuration jumpers for computer headers) and solder a 
> 5600 ohm resistor across pins 1 and 6 of the mic jack.
> 
> You might also consider connecting the headphone audio to pin 5 of the 
> mic jack - leave the jumper off the header pin 5 and connect the audio 
> to the header pin marked "5" with no connection to the pin marked "FUNC"
> 
> Then for the Heil headset, build a preamp/adapter in a small external 
> enclosure - the headset plugs into the adapter.  You will need a preamp 
> to successfully use the Heil HC5 element.
> 
> I have a schematic (it is a bit cluttered, but usable) for a preamp that 
> was designed just for that application - unfortunately I cannot attach 
> it to the reflector post, so I will send it to you separately.
> 
> 73,
> Don W3FPR
> 
> David Wilburn wrote:
>> I have a Heil headset that I purchased about 4 years ago.  I'm not 
>> sure if it is the "pro" or not.  As memory serves, at the time, the 
>> next step up had a dual element with a switch.  The headset has an 
>> HC-5 element. I have an adapter to this to connect to my recently 
>> sold, since finishing my base K2, Kenwood TS-570D(G).  I have also 
>> purchased an MH2 microphone.
>>
>> The original plan was to sell a different radio, (IC-718) and keep the 
>> TS-570 and thus the headset.  The plan then was to use the MH2 for the 
>> K2.  I will still be using the MH2 primarily for the K2.  But I want 
>> to be able to use the headset on occasion as needed.
>>
>> I understand the instructions for wiring up the MH2 on the K2.  How 
>> will this impact the use of the headset?
>>
>> This email suggests it only needs straight across jumpers.
>> http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-01/msg00598.html
>>
>> If that is the case, and I do have the Kenwood adapter already, then 
>> if I just put the straight jumpers in, I should be fine.
>>
>> If I want to use the MH2, then I need to either put the resistor in 
>> the microphone somehow (not something I am looking to tackle with my 
>> large hands) or make an adapter cable for the MH2 that has the 
>> resistor in it.
>>
>> Am I barking up the correct tree hear, or chasing a feral goose?
>