Re: [Elecraft] K3 DTMF tones

> What is surprising, however, is that everything works equally well > whether MIC BIAS is On or Off. Bias to the electret element is not supplied by mic line - it's supplied from the tone generator IC! The tone generator supplies voltage when no buttons are pushed which enables the mic. When

Re: [Elecraft] K3 DTMF tones

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

Re: [Elecraft] K3 DTMF tones

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

Re: [Elecraft] K3 DTMF tones

Thank you, Joe, Don and Chuck Jack; the mic is an MC-48 which is shown as an electret on the schematic. I shall certainly swap the plug connection from pin-5 to pin-6 and give it another go. I note that the UP and DOWN buttons give some strange effects so those need my attention too. 73 es tnx

Re: [Elecraft] K3 DTMF tones

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,

Re: [Elecraft] K3 DTMF tones

What mic model # ? Chuck Jack Sent from my iPhone, cjack > On Feb 7, 2018, at 8:09 PM, Don Wilhelm wrote: > > David, > > Are you certain the Kenwood mic is electret? Most are dynamic. Make certain > the mic plug is wired for standard Kenwood pinout for HF mics,

Re: [Elecraft] K3 DTMF tones

David, Are you certain the Kenwood mic is electret? Most are dynamic. Make certain the mic plug is wired for standard Kenwood pinout for HF mics, Some made for VHF rigs may be different. 73, Don W3FPR On 2/7/2018 9:47 AM, David Pratt wrote: In an archived message Lyle KK7P said .