Hello again, I have finally gotten around to finishing up a short analysis of the reduced-bandwidth FSK keying in the K3. As many of you are aware, Elecraft made some beta firmware available sever
Very nice work, Andy... 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-charlie Hello again, I have finally gotten around to finishing up a short analysis of the reduced-bandwidth FSK keying in the K3.
Hi Andy, great job! BTW, I don't know if I am late or if I don't remember. But, do you have any notice about how Elecraft made this superb improvement? I have tried to download theirs FW release note
The K3 Beta DSP 281 firmware will be released to production soon. Meanwhile, if anyone is interested in trying it, let me know and I'll email it to you. Ed W0YK ______________________________________
The filtered FSK is not reflected in the release notes on the Elecraft web site. The capability (enhancement) is still in closed alpha test and has not been released for open beta. Contact W0YK for
Guess you missed the point. Andy's work was with the K3 which he no doubt owns and likes. FLdigi no doubt has facilities to do testing for their software and I have major doubts that their are thousa
Most, maybe all, Yaesu rigs run AFSK. They call it FSK but when you look at the schematic you find the AFSK integrated circuit. de Paul, W8AEF Guess you missed the point. Andy's work was with the K3
Just to clear up any confusion, the *original* article that looks at the effect of waveshaping shows the K3 AFSK TX filter in only one of the figures (Figure 15 to be exact). All the others do not h
I'm afraid you missed *my* point. Andy's work with the K3 provides a false picture of the benefits of "shaped" AFSK because most of the rigs being used for AFSK do not have the same 400 Hz "AFSK" fil
Yeah but they don't mix the processor with it nor does the Mic Gain usually have a lot of difference, which is of course why they do it that way and why most of us contest guys and gals use FSK not t
As bad as the FT-dx3000, its transmit phase noise (about -100 dBc at a 1 kHz offset) is still nowhere close to the interference from an (continuous phase) FSK signal, whose keying sidebands are in th
The only way we're going to clean up the bands quickly is to pass legislation equivalent to the "Cash for Clunkers" program. You know, something like "Your old rig plus $100 for a brand new K3". We c
Too bad I don't have narrower transmit filters in my TS2000 for FSK. I guess if I want to minimize my bandwidth I'll have to go AFSK with waveshaping or get a rig with transmit waveshaping for FSK. _
Oh please! 73 Jim W7RY The only way we're going to clean up the bands quickly is to pass legislation equivalent to the "Cash for Clunkers" program. You know, something like "Your old rig plus $100 fo
There once was a list of good sound cards out. I'm thinking I first saw it on the yahoo digitalradio list that are really good for ham use. As one person once said "a 15 dollar wal mart sound card wi