[Elecraft] Little brown truck arrived w/ my K3!

[Jack Brindle]

I’ll go beyond this. CocoaModem allows for decoding two streams simultaneously. I feed the main receiver to the left channel, and the K3’s sub receiver to the right. Of course only one channel can be used for transmit since Wayne hasn’t developer a sub transmitter yet. ;-)

Other digital apps provide similar services that take advantage of separate audio feeds from the radio.


There are other uses - during a contest I will also feed the output of each receiver to be recorded on the computer. This allows me to replay some of the contest if I really get bored (makes good CW practice as well), and makes the disk vendors happier when I need more storage for all the audio files…

Note that if you want to play with CW Skimmer having high bandwidth is a huge advantage. The SLUSB has a relatively narrow bandwidth coded which means narrow band of frequencies will be decoded. Wide band interfaces will allow a much wider swath of frequencies to be decoded with Skimmer and similar software. This will be limited by the platform hardware and USB Audio drivers in play. The Mac audio, for example limits bandwidth to relatively narrow widths (96KHz as I recall), while Windows allows double that. I do not know if Windows running on VMware Fusion on the Mac will allow wider bandwidths from the audio interface, but my suspicion is that it will since Fusion provides its own USB drivers.

- Jack B, W6FB

> On Dec 19, 2014, at 8:12 AM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
> 
> David,
> 
> For data mode operation, most applications use only the left channel, but there are a few that can swap channels.  I would stick with a stereo device for the most flexibility.
> And, if you want to use the soundcard for some other purpose (such as for SDR purposes - like the KX3 I/Q RX output), you will need both channels.
> 
> In other words, more flexibility, wider bandwidth and better audio noise characteristics than the SLUSB provides.  The bandwidth is not important for data mode operation, but is a real asset for SDR use.
> 
> 73,
> Don W3FPR
> 
> On 12/19/2014 10:59 AM, David Christ wrote:
>> Memory loss here.  Remind me what the second audio channel is used for.
>> 
>> 
> 
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