[Elecraft] Dynamic Mics on K3

[Kenneth Lopez]

Giulio,

I had a brain fade....

I just realized, I only use the Shure A95 transformer when driving  
the High Impedance input of my Collins.  But that is something to  
keep in mind.

The K3 input should accept the SM57 directly with the proper cable  
wiring.

You are correct:  your problem is not the microphone.

By the way, I get very good audio reports with mine.

Jim K9YC's suggestion to roll off the low end at 50Hz and 100Hz is a  
good one.

The SM57 has quite a bit of proximity effect and you should keep your  
distance to at least 3" or more.

I use a fairly large windscreen on mine as well.

Enjoy!

Cheers,

Ken N6TZV


On Feb 11, 2009, at 4:18 PM, elecraft-request at mailman.qth.net wrote:

> Message: 17
> Date: Wed, 11 Feb 2009 22:31:24 +0100
> From: Giulio Pico - IW3HVB <iw3hvb at gmail.com>
> Subject: [Elecraft] Modulation on XV144 was: Dynamic mics on a K3
> To: Elecraft at mailman.qth.net
> Message-ID: <499343AC.9040809 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-15; format=flowed
>
> After a few good suggestions by Don, Jim and Fern I run a few more
> tests, coming at the conclusion that the problem was not the MIC,  
> or its
> interfacing with the K3 or the radio itself.
> The audio on HF bands is simply perfect, with or without compression
> (and comp acts exactly as it should).
> But the problem on 144 MHz is still there, so the problem must be  
> on the
> XV144. The Power supply is the same for both the radio and the  
> xverter,
> tried switching and stabilized with no differences.
> I've no idea where to look......  Changing the drive power (I'm using
> the KXV3 module) does'nt produce any difference as well.
> Any clues?
>
> 73 de Giulio IW3HVB

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