K3 audio distortion

[Jan Babinec]

 Dear fellow Elecrafters,
 I think this topic has fallen into oblivion somehow.
 Have been using my MD-7506 for many years now with absolute satisfaction either for ham purposes or music.
 Not so in combination with K3! In fact the audio sounds terrible. I tried a cheap PC headphones with 32ohm
 (MDR-7506 have 64ohm) and they indeed sound much better. Could this be because of lower impedance,
 limited frequency response or both?
 Is there a solution for the poor guys with too good headphones?
 
                                                                  Jan OM2XW  K3 #1382
                                                                 
 
>Is anyone else experiencing distortion when using the monitor facility on
>SSB ?

>I experience quite severe distortion when using my Sony MD-7506 headphones,
>slight distortion with my Heil Pro Set and none with my Yaesu YH-77ST. In
>other words the wider the frequency response of the headphones, the worse
>the distortion. In fact it appears the distortion is a high frequency
>component as I can clean it up completely with audio filtering after the
>headphone or speaker output but it should not be there in the first place.

>It is there with several different microphones but it does not appear on the
>transmitted signal which is clean.

>It is not my Sony headphones which are at fault as using them the audio
>through my TS2000 monitor is absolutely clean.

>73 

>Barry Simpson  VK2BJ  K3 #1397

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[Jim - W6VAR]

I have the same experience with the Heil Proset ic. Adjustments to TX audio of 2.4K and 3.2K seem to have the most impact.

Jim - W6VAR

Jan Babinec wrote

 Dear fellow Elecrafters,
 I think this topic has fallen into oblivion somehow.
 Have been using my MD-7506 for many years now with absolute satisfaction either for ham purposes or music.
 Not so in combination with K3! In fact the audio sounds terrible. I tried a cheap PC headphones with 32ohm
 (MDR-7506 have 64ohm) and they indeed sound much better. Could this be because of lower impedance,
 limited frequency response or both?
 Is there a solution for the poor guys with too good headphones?
 
                                                                  Jan OM2XW  K3 #1382
                                                                 
 
>Is anyone else experiencing distortion when using the monitor facility on>SSB ?>I experience quite severe distortion when using my Sony MD-7506 headphones,>slight distortion with my Heil Pro Set and none with my Yaesu YH-77ST. In>other words the wider the frequency response of the headphones, the worse>the distortion. In fact it appears the distortion is a high frequency>component as I can clean it up completely with audio filtering after the>headphone or speaker output but it should not be there in the first place.>It is there with several different microphones but it does not appear on the>transmitted signal which is clean.>It is not my Sony headphones which are at fault as using them the audio>through my TS2000 monitor is absolutely clean.>73 >Barry Simpson  VK2BJ  K3 #1397
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