[Elecraft] microHAM K3 cables ...

[AB7R]

Dave,

The pinout is the same. You can take a hand mic from a TS-870, 570 whatever
and plug it into the K3 and it works fine.

For electret mics, the K3 is capable of supplying bias on both the front and
rear mic connections.  For mics that are high impedance there's also a
switchable level of gain for both mic connections.  I use the proset and
they work just fine.  I also use a PR40 and that also works fine.

The proceedure is to use the MIC SEL menu to choose the desired mic and use
the "1" button to toggle the gain between hi and lo and the "2" button to
toggle the bias.

73
Greg
AB7R


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net]On Behalf Of Dave Yarnes
Sent: Wednesday, December 05, 2007 7:51 PM
To: Joe Subich, W4TV; K4IA at aol.com; elecraft at mailman.qth.net
Subject: Re: [Elecraft] microHAM K3 cables ...


I was under the impression that the K3 was wired the same as Kenwoods for
microphone usage.  However, In checking the Heil website, and the subsequent
link for mike connections, they show that pin 5 is 8 V., whereas the K3
manual shows that pin 6 should have 8 V.  Actually the website for Heil
doesn't really show how the various adapters (I.E. for the Heil Traveler)
are wired.  It only links you to the website of G4WPW for a description of
various pinouts for various rigs.  What's the deal?

Also, the K3 manual specifies a low impedence mike (600 ohms +/-).  Nothing
on the Heil website that I have found actually discusses what the impedence
is for mikes like the Heil Traveler or Pro Set.

I'm also curious why my Heil Pro Set headphones seem to have low output
compared to other headphones on various rigs that I own.  Anybody know what
the impedence is for the headphones?

Dave W7AQK

----- Original Message -----
From: "Joe Subich, W4TV" <w4tv at subich.com>
To: <K4IA at aol.com>; <elecraft at mailman.qth.net>
Sent: Wednesday, December 05, 2007 7:56 PM
Subject: RE: [Elecraft] microHAM K3 cables ...


>
>> Can you explain the note that says "!!Must be used with MH2
>> MG2 or Proset-K2?"
>
> It means that the cables (and microHAM interfaces for Elecraft)
> must be used with radios and microphones wired according to the
> "Kenwood" standard.  The original K2 had programmable mic jumpers
> and the Elecraft cable sets would only work when the mic/radio
> were wired for the MH2, MG2 or Proset-K2.
>
> The K3 is "hard wired" for Kenwood style mics - the considerations
> are the same.  OEM microphones (MH2, Proset-k2) or identically
> wired microphones must be used with the microham interfaces.
>
> 73,
>
>   ... Joe Subich, W4TV
>       microHAM America
>       http://www.microHAM-USA.com
>       http://groups.yahoo.com/group/microHAM
>       support at microham.com
>
>
>
>> -----Original Message-----
>> From: K4IA at aol.com [mailto:K4IA at aol.com]
>> Sent: Wednesday, December 05, 2007 9:21 PM
>> To: w4tv at subich.com; elecraft at mailman.qth.net
>> Subject: Re: [Elecraft] microHAM K3 cables ...
>>
>>
>> Joe -
>>
>> Can you explain the note that says "!!Must be used with MH2
>> MG2 or Proset-K2?"
>>
>> Does this mean I can not use it with the Heil Goldline with
>> the dual elements?
>>
>> k4ia
>> Craig "Buck"
>> Fredericksburg, Virginia USA
>>
>
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