For FSK and the K3 there is no advantage to either
high or low tones. The comments about AFSK and low
tones are valid for any radio.
73,
... Joe, W4TV
> -----Original Message-----
> From: rtty-bounces@contesting.com
> [mailto:rtty-bounces@contesting.com] On Behalf Of Glenn Anderson
> Sent: Monday, March 01, 2010 10:11 PM
> To: 'Joe Subich, W4TV'; rtty@contesting.com
> Subject: Re: [RTTY] Low Tones
>
>
> I am using a K3 and FSK.
>
> -----Original Message-----
> From: rtty-bounces@contesting.com
> [mailto:rtty-bounces@contesting.com] On Behalf Of Joe Subich, W4TV
> Sent: Monday, March 01, 2010 3:01 PM
> To: wb5tuf@earthlink.net; rtty@contesting.com
> Subject: Re: [RTTY] Low Tones
>
>
>
> Are you using FSK or AFSK? For AFSK, using high tones (2125/2295)
> places the tones such that any harmonics are eliminated by the
> transmitter IF filter. With low tones, harmonics caused by over-
> driving the microphone circuits are within the transmit audio
> passband and will be transmitted along with the desired tones.
>
> Many of the older transceivers were also limited to high tones
> for narrow filters to work on receive.
>
> 73,
>
> ... Joe, W4TV
>
>
>
> > -----Original Message-----
> > From: rtty-bounces@contesting.com
> > [mailto:rtty-bounces@contesting.com] On Behalf Of
> wb5tuf@earthlink.net
> > Sent: Monday, March 01, 2010 2:53 PM
> > To: rtty@contesting.com
> > Subject: [RTTY] Low Tones
> >
> >
> > Other that operator preference, is there any advantage to
> > using high or low tones?
> >
>
> _______________________________________________
> RTTY mailing list
> RTTY@contesting.com
> http://lists.contesting.com/mailman/listinfo/rtty
>
>
> _______________________________________________
> RTTY mailing list
> RTTY@contesting.com
> http://lists.contesting.com/mailman/listinfo/rtty
_______________________________________________
RTTY mailing list
RTTY@contesting.com
http://lists.contesting.com/mailman/listinfo/rtty
|