[RTTY] FSK vs AFSK

[Don Cassel]

Hi Reid and all,

Interesting comments on technique and must say that I also prefer RIT to
AFC. But you can select the narrow filters in the Mark V. I do it all the
time, ie. use 500 and 250 Hz cw filters in Rtty AFSK. It's as simple as
bringing your audio in to the Packet jack instead of the mike and choose
Packet-LSB for the mode.

I use only AFSK because to use FSK I need to make changes on the Rigblaster
Plus when switching back to CW. By using AFSK I can use all modes without
changing any settings. And by using reasonable audio levels I have never had
a complaint. Of course this has all been discussed many times before on this
and the Writelog list.

73, Don VE3XD

Howdy Ron, Bill, et al. 

> -----Original Message-----
> From: rtty-bounces at contesting.com 
> [mailto:rtty-bounces at contesting.com] On Behalf Of Reid Hill
> Sent: Friday, December 10, 2004 4:02 PM
> To: RTTY at contesting.com
> Subject: Re: [RTTY] FSK vs AFSK
> 
> --- Bill Turner <dezrat1242 at ispwest.com> wrote:
> 
> > I concur with the others that FSK is the way to go, but 
> there is one 
> > small advantage to AFSK:  You can use both AFC and NET at the same 
> > time if you wish.  I don't believe this is sufficient advantage to 
> > choose AFSK, but you should be aware of it.  AFC and NET together 
> > makes tuning less critical, which may be important if you're using 
> > relatively wide bandwidth for receiving.  If you're using less than 
> > about 300 Hz bandwidth, there is little advantage to be gained.
> > 
> > --
> > Bill W6WRT
> > 
> 
> Howdy Ron, Bill, et al.
> 
> But this also goes to what others have said about knowing 
> what you are doing. In a contest with crowded bands AFC can 
> be an absolute pain. When someone is running with AFC and 
> starts that drift it can cause a load of problems to those 
> calling and those around them trying to hold a freq. RIT 
> works just as well but it requires a little manual effort and 
> with the Writelog function in your macro, zeroing the RIT is 
> easy. NET is a MUST when using AFSK but not AFC at least not 
> in contesting, DXing and rag chewing, sure.
> 
> But FSK has a BIG advantage over AFSK for one reason in my 
> mind, FILTERS. I like being able to select between the 500Hz 
> and 300Hz filters when needed, something my FT1000MP MKV 
> would not let me do in AFSK.
> Of course with some of the newer radios (746pro, 756pro, 
> Orion) AFSK filter selection is easier. But if you do not 
> have a radio that will allow to you roll your own software 
> filters in LSB then FSK is the way to go. Believe me 500Hz in 
> contest is a must!
> 
> Reid
> KC5YKX
> 
> 
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