[CQ-Contest] Rig Comparisons for Transmitter Noise

[Jim Brown]

Thanks for the link, David.

I have my own take on this, which is more generic and differs a bit from 
Eric's.  Part of it is because I run SO2R feeding my mic through a YCCC 
box, but mostly it's the result of my greater understanding of audio and 
the fundamental causes of hum and buzz. And I prefer solutions that are 
effective, free, and simple. :)

Avoiding hum and buzz without transformers is covered in

http://k9yc.com/HamInterfacing.pdf

Setting computer audio playback  levels is covered in

http://k9yc.com/USB_Interfaces.pdf

All of this advice applies to both SSB and digital modes, except that I 
no longer recommend using most internal sound cards for digital modes 
because inexpensive USB sound cards work a lot better.

73, Jim K9YC

On Sun,9/7/2014 2:28 PM, David Siddall wrote:
> Jim,
>
> Good stuff, thanks!
>
> I also recommend K3NA's article on adjusting SSB audio chain.  While 
> specific to Orion, the principles are adaptable any any rig.
>
> http://www.k3na.org/articles/Transmit%20audio%20adjustment.pdf