[Elecraft] Dynamic Mics on K3

[Giulio Pico - IW3HVB]

Don Wilhelm ha scritto:
> Giulio,
>
> You did not say what microphones you were trying to use, only that 
> they were 'dynamic'.  Are you attempting to use Pro-Audio 
> microphones?  If so, check out the information provided by Jim Brown 
> K9YC at http://haminterfacing.pdf/.  Do your microphones have adequate 
> output?  Do they need Phantom Power?  There can be many reasons you 
> are not having success.
>
> How does the audio sound from the K3 monitor.  You said you did the 
> evaluation on 144 MHz, but what mode?  If it is FM, then many have 
> reported issues with 'thin audio' on FM, and Elecraft is currently 
> working on improvement for that condition.  How does the K3 sound with 
> the microphones on SSB?
>

Currently I'm using a Shure SM57 dynamic mic. The others are brandless 
or unknown.
The mic doesn't need phantom power, but I agree with you that the output 
level of the microphone maybe is a little low.
The tests I run were on SSB only, no FM or AM. The sound on the K3 
monitor seems perfect (and that points the problem elsewhere, that is a 
test I didn't make until a minute ago).
After a brief test on hf (listening on a K2) the audio seems fairly 
better than on 144 MHz. I've a feeling about the XV144.... It seems that 
at a certain point in the IF path the signal become reduced in 
bandwidth, maybe the filters are a little off band....

73 de Giulio IW3HVB