[Elecraft] K3 DTMF tones

[hawley, charles j jr]

I’m thinking that the bias on/off is a voltage applied to the mic lead, pin 1. That works for some xlr hookups. I was thinking that pin 5 for the kenwood (also) powers the amp in the base of some of the kenwood mics. The pin 5 or 6 voltage is on all the time.

Chuck Jack 
Ke9uw
Sent from my iPhone, cjack 

> On Feb 8, 2018, at 4:24 AM, David Pratt <david at g4dmp.co.uk> wrote:
> 
> I am delighted to report back that changing the wire from pin-5 to pin-6
> has done the trick. DTMF tones work fine on the K3 as do also the UP and
> DOWN buttons with MIC BTN On in the CONFIG menu.  The DTMF tones also
> work on the K2.
> 
> What is surprising, however, is that everything works equally well
> whether MIC BIAS is On or Off. I would have thought that the voltage on
> pin-6 of the front panel socket would have gone off when MIC BIAS is set
> to Off, but that is evidently not the case.
> 
> Thank you again, Joe.
> 
> 73 de David G4DMP
> 
> In a recent message, "Joe Subich, W4TV" <lists at subich.com> writes
>> 
>> Elecraft and Kenwood reverse the pin used for +8V that powers
>> the DTMF encoder.  You will need to move the wire on pin 5 of
>> the Kenwood Foster plug to pin 6 to get the +8V from K3/K3s.
> 
>> The same is true if you want to use a Kenwood desk mic with
>> built-in preamp or active equalizer (e.g., MC-60A, MC-80, MC-85,
>> etc.) with the preamp or eq.
> 
>> 73,
> 
>    ... Joe, W4TV
> 
> -- 
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> | David M Pratt, Kippax, Leeds.   |
> | Website: http://www.g4dmp.co.uk |
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