[Elecraft] MH2 Mic issue

2009-07-26 Thread Stephen Rector
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
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Re: [Elecraft] MH2 Mic issue

2009-07-26 Thread Don Wilhelm
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
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 Elecraft mailing list
 Home: http://mailman.qth.net/mailman/listinfo/elecraft
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 Post: mailto:Elecraft@mailman.qth.net

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