[Elecraft] MH-2 and Boomset Problem

[Mark Adams, PE]

Hi Don,

This is much more complex than I originally thought!

The BM-10 was purchased with adapters for an Omni 6 (4-pin) and a Yaesu 
817 (RG-xx). The pads are black and it has the HC-5 element.  The cord 
coming from the boomset has a connector that takes either above adapter, 
or, it can go directly into the K2 mic connector.  The headset only had 
BM-10 shown as its model number.

All this discussion may be why I only do about 20 SSB Q's/yr on HF! Now 
in the VHF rover I do 1000+/yr, but we the Yaesu hand mics that came 
with the rigs.

Thanks,
Mark K2QO

Don Wilhelm wrote:

>Mark,
>
>Still not enough info - BM-10 is a Heil number, not an Elecraft number, and
>there are 3 models of the BM-10 - one with the HC-4 element, one with the
>HC-5 element and one with an electret element for Icom.  Are the pads blue,
>red, or black?
>
>The above info is only for starters - these mics are sold by Heil for
>specific rigs and vary in the wiring at the plug, so you must also know
>which transceiver it was originally intended for.
>
>If I had to guess, I would say that your BM-10 is wired for the Yaesu which
>uses pin 6 for PTT, and when you connect it to the K2 and press the
>footswitch, you are shorting the K2 +5 volts pin (6) to ground.  Heil refers
>to the Yaesu BM-10 as BM-10-Y, but I don't know whether that is simply
>ordering info or if that number is imprinted on the mic.
>
>73,
>Don W3FPR
>
>  
>
>>-----Original Message-----
>>From: Mark Adams [mailto:msadams at acsu.buffalo.edu]
>>Sent: Monday, February 13, 2006 10:41 PM
>>To: w3fpr at arrl.net
>>Subject: RE: [Elecraft] MH-2 and Boomset Problem
>>
>>
>>
>>Don,
>>
>>the Elecraft mike is the HM2 hand mike and the Heil boom set is the
>>discontinued BM-10. It's a smaller version of the full size Pro Set.  Is
>>this enough to answer teh question?
>>
>>73,
>>Mark K2QO
>>
>>Quoting Don Wilhelm <w3fpr at earthlink.net>:
>>
>>    
>>
>>>Mark,
>>>
>>>Just saying 'Heil boom set' is not sufficient information to tell me
>>>which
>>>mic you actually have.
>>>Is it the Elecraft MD2?  Is it the Heil ProSet (if so, which one of
>>>these is
>>>it)?  If the mic was made for use with an Elecraft or an Icom, then
>>>it
>>>should have an electret element in it, but if it has the Heil HC4 or
>>>HC5
>>>elements, it is a dynamic mic element and does not need voltage
>>>applied to
>>>it.
>>>
>>>Let us know what you really have and perhaps we can help.
>>>
>>>73,
>>>Don W3FPR
>>>
>>>      
>>>
>>>>-----Original Message-----
>>>>
>>>>This should be and easy one. I have a K2, SN543, loaded with all
>>>>        
>>>>
>>>updates
>>>      
>>>
>>>>and firmware but no 100W. I've used the HM-2 with for a couple of
>>>>years for a couple dozen SSB contacts. When I plug my Heil boom set
>>>>        
>>>>
>>>in
>>>      
>>>
>>>>and key it with the foot pedal, the rig shuts off.
>>>>
>>>>Does the resistor on the back of the mic connector need to be
>>>>        
>>>>
>>>removed to
>>>      
>>>
>>>>use the boom set? I actually just tried this yesterday. Never
>>>>        
>>>>
>>>noticed
>>>      
>>>
>>>>that the Heil came with a compatible connector, no adapter needed.
>>>>
>>>>        
>>>>
>>>
>>>      
>>>
>>
>>Mark S. Adams, P.E.
>>Environment, Health & Safety
>>University at Buffalo
>>220 Winspear Avenue
>>Buffalo, NY 14215-1034
>>Tel: 716.829.3707 ext 25
>>Cell: 716.863.7229
>>
>>
>>--
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>>
>>
>>    
>>
>
>
>  
>