K3 - Recieve Audio Enhancement

[Stewart Baker]

Hi,
I have made a simple modification of my K3 to improve the receive
audio.

* It does not required any experience of SMD.
* It does not affect the warranty (A.F.A.I.K.)
* It can be easily removed.

http://homepages.nildram.co.uk/~baker/index.html

73
Stewart G3RXQ

Y.M.M.V.
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[M0XDF]

interesting - i don't have a buzz problem, but if i notice one, i know  
what to do

I tend to use headphones anyway
--
"There is no limit to what you can accomplish if you don't care who
gets the credit." --Ronald Reagan

On 14 Mar 2008, at 14:24, Stewart Baker wrote:

> Hi,
> I have made a simple modification of my K3 to improve the receive
> audio.
>
> * It does not required any experience of SMD.
> * It does not affect the warranty (A.F.A.I.K.)
> * It can be easily removed.
>
> http://homepages.nildram.co.uk/~baker/index.html

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[Fern Rivard]

   Can anyone please enlighten me on whether the UP and Down feature on the microphone connect work against ground or +8 volts dc. Although I purchases the optional electret style of hand microphone, I much prefer a good dynamic microphone. I'm presently using the Shure 444D dynamic desk microphone with excellent transmit audio report. I've just tried a dynamic hand mic meant for the TAD line of commercial radios with also excellent transmit audio. This hand mic also has the UP and Down buttons so I would like to wire that feature but need to know as to whether it works against ground or + 8 vdc. I will be selling the factory electret hand mic for anyone interested.
    Fern

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[Brett Howard]

Not sure off the top of the head but I'm sure that if you pull up a  
schematic for a kenwood mic you'd get the answer.  I do know that that  
is not yet implemented in the firmware.  I remember Wayne mentioning  
that a while back and haven't seen it added in any of the recent  
release notes.

Quoting Fern Rivard <[hidden email]>:

>    Can anyone please enlighten me on whether the UP and Down feature  
>  on the microphone connect work against ground or +8 volts dc.


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[Bill N2BC]

Looking at the K3 diagram & a couple of Kenwood mics... UP/DOWN go to
ground.

73, Bill  N2BC
----- Original Message -----
From: "Brett Howard" <[hidden email]>
To: "Fern Rivard" <[hidden email]>
Cc: "Elecraft Reflector" <[hidden email]>
Sent: Friday, March 14, 2008 8:51 PM
Subject: Re: [Elecraft] re UP & Down features on mic


> Not sure off the top of the head but I'm sure that if you pull up a
> schematic for a kenwood mic you'd get the answer.  I do know that that  is
> not yet implemented in the firmware.  I remember Wayne mentioning  that a
> while back and haven't seen it added in any of the recent  release notes.
>
> Quoting Fern Rivard <[hidden email]>:
>
>>    Can anyone please enlighten me on whether the UP and Down feature  on
>> the microphone connect work against ground or +8 volts dc.


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[David Pratt-2]

In a recent message, Fern Rivard <[hidden email]> wrote ...
>   Can anyone please enlighten me on whether the UP and Down feature on
>the microphone connect work against ground or +8 volts dc. Although I
>purchases the optional electret style of hand microphone, I much prefer
>a good dynamic microphone.

The UP/DOWN buttons on the Kenwood MC-43S switch between VFO A and VFO B
on the K2.  I presume that the same will eventually apply to the K3 in
the interests of compatibility.

73
--
David G4DMP
Leeds, England, UK
------


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