I got the Numark STEREO iO Analog-To-Digital DJ Interface instead of the Signal Link… Half the price and works well.
73 Gil, W1RG From: Walter Underwood Sent: Tuesday, June 9, 2015 5:20 PM To: [email protected] Please read this well-researched document. It has already been recommended in this string. http://audiosystemsgroup.com/USB_Interfaces.pdf wunder K6WRU CM87wj http://observer.wunderwood.org/ (my blog) On Jun 9, 2015, at 2:16 PM, David Ahrendts <[email protected]> wrote: > Gentlemen, suggest some alternatives to the SignalLink USB for digital. Would > like to research. > > David A., KC0XT > >> On Jun 9, 2015, at 2:10 PM, Joe Subich, W4TV <[email protected]> wrote: >> >> >>> I think there is one point that is overlooked in a lot of these >>> discussions. It really doesn't take much of a sound card to do >>> digital signal processing on 3 KHz or less audio streram. >> >> There are a significant number of reports concerning the issues with >> Signalink on-line if one bothers to look. In general they relate to >> improper filtering of the USB +5V power, lack of a regulator for the >> V/2 reference to the sound codec (analog to digital converter), lack >> of proper bypassing of noise from the various chips, requirement that >> the digital to analog converter be run at too high a level in order >> for the "VOX" to trigger reliably, etc. >> >> In general, this means Signalink loses 15 dB or more of signal to >> noise ratio (which is a big deal with modes like JT65 and JT9 on HF) >> on the receive side and is much more "dirty" (often with multiple >> audio signals) on transmit. >> >> You're correct that it does not take much of a sound card to decode >> some signals. However, the Signalink "sound card" contains most of >> the same components as the generic USB sound products that perform >> much better - yet Signalink costs two to three times as much. >> >> 73, >> >> ... Joe, W4TV >> >> >> On 2015-06-09 3:59 PM, Barry LaZar wrote: >>> Joe, >>> You bring an interesting point of view. I've been using a SignaLink >>> USB for at least 3-4 years. I haven't had an issue with it except not >>> enough time to play. And, I can't blame the manufacturer for that. >>> >>> I think there is one point that is overlooked in a lot of these >>> discussions. It really doesn't take much of a sound card to do digital >>> signal processing on 3 KHz or less audio streram. However, I would never >>> use a card in my laptop or my I/F for some of the heavier lifting here >>> in my shack where I need 96KHz sample rates or better with 24 bit >>> digitizing. But for just hook it up, set the levels and go, an interface >>> with a built in sound card is not a bad way to go. In many cases, it is >>> just easier to do and it allows for more flexibility. >>> >>> 73, >>> Barry >>> K3NDM >>> >>> On 6/9/2015 3:11 PM, Joe Subich, W4TV wrote: >>>> >>>> On 2015-06-09 12:02 PM, Bob N3MNT wrote: >>>>> OP said computer did not have an audio input. >>>> >>>> He's still better off with an external USB sound card of reasonable >>>> quality and a pair of audio cables than using the Tigertronix product >>>> of dubious quality and well documented poor design. A simple USB sound >>>> card of reasonable quality will cost 1/3 to 1/2 as much as the inferior >>>> "amateur" product. >>>> >>>> 73, >>>> >>>> ... Joe, W4TV >>>> ______________________________________________________________ >>>> 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 >>>> Message delivered to [email protected] >>>> >>> >>> ______________________________________________________________ >>> 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 >>> Message delivered to [email protected] >>> >> ______________________________________________________________ >> 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 >> Message delivered to [email protected] > > > > > David Ahrendts [email protected] > > > > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
