On 1/25/2014 9:50 AM, Edward R Cole wrote:
The K3 is connected via the line-out to a Delta44 soundcard at the PC.
I don't know anything about this sound card, but I've worked a lot of JT65 and RTTY, and I found that a good semi-pro audio USB interface improved JT65 decoding a LOT as compared to the sound card built into my Thinkpad. With extensive testing of two computers next to each other connected to the same audio, the USB interface gave me twice as many decodes in a pass using JT65-HF, and gave me decodes about 10dB lower into the noise (fairly often in the range of -20 to -22).
I bought and tested three USB interfaces -- a Numark (about $35) a Tascam (about $75), and a little mickey-mouse sort of thing. The Numark and Tascam were equally good at decoding both JT65 and RTTY. The little thingy worked, but was so poorly built I wouldn't recommend it. The Numark has no model number, the Tascam has been discontinued and replaced by one with more inputs and a higher price. I'm confident that it works as well. Both the Numark and the Tascam units have line inputs and outputs, and RIAA inputs. The Tascam has inputs for guitar and pro mics, so it's a bit more versatile in accepting different input levels.
The Tascam is hooked up to my "main" K3, the Numark gets used with the other radio when I do SO2R RTTY contesting.
73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
