[Elecraft] Fwd: MH2 Mic issue

[Stephen Rector]

Begin forwarded message:

> From: Stephen Rector <azstefano at mac.com>
> Date: July 26, 2009 5:26:51 PM GMT-07:00
> To: don at w3fpr.com
> Subject: Re: [Elecraft] MH2 Mic issue
> Message-Id: <32086425-1687-4F48-8559-B91C3895BE91 at mac.com>
> In-Reply-To: <4A6CEE8D.2070203 at w3fpr.com>
> Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
> X-Smtp-Server: smtp.mac.com:azstefano
> Content-Transfer-Encoding: 7bit
> Mime-Version: 1.0 (Apple Message framework v935.3)
> References: <C4B523E9-4D50-484C-97C9-0586BBAE3AB8 at mac.com> <4A6CE6F0.7050408 at embarqmail.com 
> > <321A9BCF-9EDE-42B6-B4B3-09C9FE59AB97 at mac.com> <4A6CEE8D.2070203 at w3fpr.com 
> >
>
> Hi Don:
>
> I did it the more painful way - pulling out the front now means  
> removing the DSP boards... I'll remember the side panel suggestion...
>
> Anyway - problem solved, and the HM-10 doesn't mind the DC on the AF  
> line, so both mics are working.
>
> Thanks for that almost instant help. Nice to see such an active  
> list. I've been inactive ham for almost 10 years, but now hv excuse  
> to spend some more time on the air as the next sunspot cycle builds  
> steam.
>
> Thanks,
>
> Steve NU7B
>
>
> On Jul 26, 2009, at 5:02 PM, Don Wilhelm wrote:
>
>> Steve,
>>
>> You can get access to the back of the mic jack by removing the left  
>> side panel - enough clearance to change the end of the resistor  
>> from pin 2 to pin 1.
>>
>> 73,
>> Don W3FPR
>>
>> Stephen Rector wrote:
>>> Oy - that would explain it. I'll check that right now. maybe a  
>>> cerebral typo....
>>>
>>> Tnx,
>>>
>>> Steve
>>>
>>>
>>> On Jul 26, 2009, at 4:29 PM, Don Wilhelm wrote:
>>>
>>>> Steve,
>>>>
>>>> Re-check those instructions for the MH2.  The resistor goes  
>>>> between pins 1 and 6.  Pin 1 is the AF line, and pin 6 is the 5  
>>>> volt line.  You must pipe voltage to the AF line on the mike  
>>>> (through the resistor) to make it produce audio.
>>>>
>>>> BTW, pin 2 is the PTT pin.
>>>>
>>>> 73,
>>>> Don W3FPR
>>>>
>>>> Stephen Rector wrote:
>>>>> Hi All:
>>>>>
>>>>> I'm new to this list. As of last week, my K2 s/n 6770 is up and   
>>>>> running - I'm quite happy with it. Even though I have a stealth  
>>>>> sloper  to a pine tree (HOA restriction), the receiver has  
>>>>> impressed me, and  the QRP gets out (next weekend's board is the  
>>>>> 100W PA). This weekend I  got three of the accessory boards  
>>>>> installed pretty much without a  hitch, except for a problem  
>>>>> with the MH2 hand mic.
>>>>>
>>>>> The KSSB2 board seems fully functional and I get good reports  
>>>>> on  transmit audio when I use a Heil HM-10 with the K2. But when  
>>>>> I plug in  the new MH2 hand mic, the T/R keys but with zero  
>>>>> audio: no ALC  indication and no RF. Is there a measurement I  
>>>>> can make on the MH2  before sending it back? (I wired in the  
>>>>> 5.6K resistor from pins 2-6  per the instructions)
>>>>>
>>>>> Steve NU7B
>>>>> ______________________________________________________________
>>>>> 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
>>>>> ------------------------------------------------------------------------
>>>>>
>>>>>
>>>>> No virus found in this incoming message.
>>>>> Checked by AVG - www.avg.com Version: 8.5.392 / Virus Database:  
>>>>> 270.13.31/2264 - Release Date: 07/26/09 11:07:00
>>>>>
>>>>>
>>> ------------------------------------------------------------------------
>>>
>>>
>>> No virus found in this incoming message.
>>> Checked by AVG - www.avg.com Version: 8.5.392 / Virus Database:  
>>> 270.13.31/2264 - Release Date: 07/26/09 11:07:00
>>>
>>>
>