[Elecraft] K3 Hum on Audio...

[george fritkin]

I would short all audio inputs to the K3 right at the connector input with everything disconnected except antenna.  Key up radio in SSB and see if audio buzz is still there.

This test pretty much isolates the K3

George, W6GF

Love my two K3s and awaiting my KX3


________________________________
 From: Barry N1EU <barry.n1eu at gmail.com>
To:
Sent: Friday, January 13, 2012 9:58 AM
Subject: Re: [Elecraft] K3 Hum on Audio...
 

Jim Brown-10 wrote
> 
> On 1/13/2012 9:20 AM, Phil Hystad wrote:
>> Unfortunately, it is in both mics but not as strong in the Yamaha CM500
>> mic as in the MH2 but it is present.
> 
> The K3 has unshielded audio transformers at all the audio inputs and 
> outputs, and an unshielded transformer is a sitting duck for magnetic 
> fields.
> 

I'm fairly certain that there are no transformers being used on the mic
inputs, only the line input (mono) and line outputs (stereo).

Barry N1EU


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