Wes, I don't think that you're getting it. The APF has nothing to do with
TONE, it has to do with Peaking a freq. within the Band Pass filter area. You
don't always want to change the tone just because you're moving the peak of a
signal.. We're not talking about an IF center peak, we're talking about peaking
a PART of the tone you're already listening to... There's no need to move the
RIT or the Pitch with the APF at all.. You're just confusing things, and asking
for changes that have nothing to do with an APF control knob. You have to
separate the idea of freq., tone, and Peaking a portion of a signal... They're
ALL different things here.
My shift knob sets the center of my IF Pass band, my RIT knob moves people into
the tone that my Pitch is set to (yes center of the IF usually), and APF should
peak a portion of that IF area that I choose (like a manual Notch filter does,
but reverse)... Not move it around. 3 different things here... Does it make
more sense to you?
Date: Tue, 26 Oct 2010 18:06:00 -0700
From: n...@yahoo.com
Subject: Re: [Elecraft] APF For K3: progress report
To: notforc...@hotmail.com; d...@w3fpr.com
CC: elecraft@mailman.qth.net
I tend to agree.
However, if people insist in doing this then as I said earlier if one is going
to use a tunable audio filter adjusted to a frequency other than what the
"Pitch" control is currently set for, then the pitch frequency should follow
along so that it affects the transmitter as well.
If this APF is implemented this way then it becomes the "live pitch control"
being asked for. Any other implementation becomes an "unintended RIT control."
Wes
--- On Tue, 10/26/10, Don Wilhelm <w3...@embarqmail.com> wrote:
Sorry, but I did not "miss his point". It simply boggles my mind that
someone would want to change his chosen sidetone pitch. I have chosen
mine carefully - that is the pitch where my mind/ears perceive the CW
with the best clarity and comfort over the 'long haul'.
I can understand why some might want to make a "change of pace" during a
long contest, and change the sidetone pitch a bit - but for normal
operating, I want the pitch to be the same as I have previously selected
-- that is the pitch where I can operate CW best. My own choice is 650
Hz, but yours may be different.
To change the pitch for a particular QSO seems counterproductive to me.
If one is hearing a signal best at a pitch which is not the current one
set for the sidetone, I would think that to be an indication that I have
chosen the wrong sidetone pitch and I should think seriously about
changing to that pitch that I perceive to be the best in the midst of
signals on the band.
I guess this is part of the reason we hear so many QSOs that are not
zero beat. We used to know how to do that very well with separate
transmitters and receivers, but in these days of transceivers, I think
we have lost that ability - it seems to me that if we can hear a signal
within our passband, that we should just transmit and expect to be
answered - with no need to zero-beat. Sorry, but it just does not work
that way - the other station may have narrow filters on and may not hear us.
73,
Don W3FPR
On 10/26/2010 5:13 PM, The Smiths wrote:
> Wow Don, you really really missed his point. He's trying to say that the
> Pitch control turns on a tone generator while you're setting it. He's asking
> that when you push the button that sets the pitch freq. that the tone isn't
> generated.. That way he can hear the person he's talking to while adjusting
> the freq. of his IF's center pass band area. Plenty of us wish we had this
> ability.. There are MANY times when I feel like I want to adjust the tone of
> the persons signal without moving it away from the IF center, and then having
> to chase after it with the shift knob.. His idea would do exactly that.
>
>> Date: Tue, 26 Oct 2010 10:50:51 -0400
>> From: w3...@embarqmail.com
>> To: drew...@verizon.net
>> CC: Elecraft@mailman.qth.net
>> Subject: Re: [Elecraft] APF For K3: progress report
>>
>> Drew,
>>
>> ?HUH?
>> The "pitch" function that you say you want - change the pitch of a
>> received signal - already exists, just turn the VFO knob, it will change
>> the pitch of the signals which are being received. Normally one would
>> want to tune the desired signal to the pitch which matches the sidetone,
>> not the other way around. Just tap the SPOT button to zero-beat, in
>> fact the K3 can do that automatically (within a limited range).
>>
>> Things that are changed by the PITCH control are the pitch of the
>> sidetone you listen to during transmission, the frequency offset used
>> for transmission and the CWT center frequency as well as the position of
>> the center of the CW passband - it does not change the pitch of signals
>> being received.
>>
>> Can you be more specific about what you want.
>>
>> 73,
>> Don W3FPR
>>
>> On 10/26/2010 9:37 AM, drewko wrote:
>>> Paul,
>>>
>>> I would be very happy to just have a "live" PITCH control, as has been
>>> requested a number of times. By "live" I mean being able to hear the
>>> received signals as you vary their pitch, without changing their
>>> location in the passband. That would be much better than having to
>>> first adjust RIT for a more suitable pitch tone then subsequently
>>> having to catch up to it with SHIFT as you describe below.
>>>
>>> As it is now, PITCH is a sidetone control, not a signal control. When
>>> you turn on PITCH the sidetone comes on and the signals go away. To me
>>> it is as nearly inconvenient as it would be having the signals go away
>>> every time I moved the AF Gain control.
>>>
>>> The peaking part of APF would be a nice enhancement but it's the live
>>> pitch control that I really want.
>>>
>>
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