[Elecraft] RTTY filter for K3

[Ken K3IU]

As far as I know, the reason for having the capability of changing the 
Mark freq is for personal preference in what you like to listen to. The 
Dual PB filter works at whatever frequency you select. I can think of no 
reason why AFSK A and DATA A modes would necessarily have to be the same.

I'm not sure why you want to change the center frequency to specifically 
1500 HZ in AFSK A mode. I sure wouldn't... that's too high for my ears. 
I prefer the lower mark frequency of 915 Hz. The software that is 
decoding the signal sure doesn't care and it doesn't make any difference 
to what you are sending.

But as they say here ofter.... YMMV.

73,
Ken K3IU
~~~~~~~~~~~~~~~~~~~~~
n4lq wrote:
> Yes but it won't change the center fq. to 1500Hz so it will be like 
> DATA A. I'm not sure what the purpose of changing the pitch is.
>
> Steve Ellington
> N4LQ at insightbb.com
> ----- Original Message ----- From: "Ken K3IU" <kenk3iu at cox.net>
> To: "n4lq" <n4lq at insightbb.com>
> Cc: <elecraft at mailman.qth.net>
> Sent: Sunday, May 18, 2008 2:43 PM
> Subject: Re: [Elecraft] RTTY filter for K3
>
>
>> You can change the MARK freq in AFSK A mode to one of four values
>> ranging from 915 Hz to 2125 Hz by pressing PITCH and rotating the VFO A
>> knob which, of course, will change the center frequency accordingly.
>>
>> 73,
>> Ken K3IU
>> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> n4lq wrote:
>>> To use the DTF, I changed to AFSK A mode. This allows the DTF to work
>>> however the center frequency of the IF changes from 1500Hz to 1356Hz.
>>> I will notify Elecraft about these.
>
>
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