Morning Al,
Hmmmm...ringing? Don't think I've ever noticed that in my (previous) IC-781,
Corsair 2, or Omni 6. Course, my hearing is probably not the best for high
frequency audio range.
Most of the time I would run with 500Hz filters, depending somewhat on band
condx. Much over 70 wpm, your so heavily concentrated on the copy, that you
kinda 'weed out' things that you don't want to hear, so if the filters do
ring, they are just ignored, but honestly, I've not encountered filter
ringing in these rigs. But since my health problems and two years off,
right now I can only copy around 80 wpm. And now day's there is no one to
practice with to try and get that back. I think it's pretty fascinating what
the brain does when you start copying much over 70 wpm, you really do get
focused and the things that 'bother' you at, say, 30 wpm, just become a
non-factor. The Orion would be a ideal radio for QRQ, it's rcvr is
excellent...just too bad it will not send CW correctly over 40 wpm.
By the way Al, much over 70 wpm and your not really conscious of hearing
dots and dashes, much less hearing anything in between them! It's really
interesting because while you are not conscious of the dots and dashes (your
copying words, not characters), if the sending station makes a typo, the
error pop's right out to you, but as long as he is not making errors, you
dont notice the spelling!
Tom - W4BQF
----- Original Message -----
From: <al_lorona@agilent.com>
To: <tentec@contesting.com>
Sent: Sunday, August 15, 2004 8:20 PM
Subject: [TenTec] Ringing in Filters at High Speed CW
Tom, I meant to ask you this when the subject of 100 wpm CW first came up in
this thread a while ago. Thus, I have changed the name of this sub-thread.
When you're receiving CW that fast, how much does the ringing of the various
filters in the radio affect you? I would imagine that at those speeds,
ringing starts to fill in the spaces between the dits, making it very
difficult to deal with. I would guess that when you're going that fast, that
you use the widest possible filter settings, right?
Al W6LX
> -----Original Message-----
> From: tentec-bounces@contesting.com
> [mailto:tentec-bounces@contesting.com]On Behalf Of Tommy
> Sent: Friday, August 13, 2004 3:19 PM
> To: tentec@contesting.com
> Subject: Re: [TenTec] DSP in CW transmit?
>
>
> I think some are getting hung up on the 100 wpm thing. And
> the speed is not
> the point...the point is just the FUN of doing something like
> that. Since my
> two strokes, I'm lucky to be doing much between 70 and 80
> wpm. 100 wpm may
> be a thing of the past for me, but there is now no one around
> to try it
> with.
>
> Believe it or not, there is more 'full duplex' going on at
> 100 wpm than
> there is at 40 wpm. It's basically not much difference from using a
> different language and talking to someone on a telephone.
>
> The discussion about DSP is moot. It's here and it has to be
> in every radio
> so manufacturers can claim to be with the state of the art. I have to
> accept that, and I do. But that is not going to hinder me in
> enjoying part
> of this hobby that I enjoy, it just means I have to hold on
> to the older
> rig's that will function in the CW mode the way I want mine
> to function.
>
> Heck, I enjoy rag chewing at 30 wpm just as much as I enjoy
> rag chewing at
> 70 wpm. What I DO NOT enjoy is paying $3700 for a radio that
> will not even
> function well at the 30 wpm level.
>
> Tom - W4BQF
>
> ----- Original Message -----
> From: "n4lq" <n4lq@iglou.com>
> To: <tentec@contesting.com>
> Sent: Friday, August 13, 2004 3:47 PM
> Subject: Re: [TenTec] DSP in CW transmit?
>
>
> > There is some truth here but it still doesn't discourage us
> QSKers from
> > pursuing our goal. Learning to live with no QSK is not an
> option for us.
> > Certainly, the breaker must send more than a few characters
> in order for
> > the breakee to hear him since some of the breakers characters will
> > coincide with the timing of the breakee's characters and
> not be heard.
> > Now for these guys going 100 wpm....By the time they are broken, the
> > breakee will have sent an entire paragraph and the breaker may have
> > forgotten why he broke in the first place. I don't think
> there is a whole
> > lot of duplex cw going on at 100 wpm but there are quiet a
> few at 30 wpm.
> > Noting is quite as satisfying as a full duplex cw qso. I
> find the silence
> > between the characters of semi-BKin eerie and frustrating,
> thinking all
> > along that something may be going on that I need to hear!
> > n4lq
> > -----Original Message-----
> > From: Lee Crocker <w9oy@yahoo.com>
> > To: tentec@contesting.com
> > Date: Fri, 13 Aug 2004 12:02:20 -0700 (PDT)
> > Subject: [TenTec] DSP in CW transmit?
> >
> > > But it's not just the generation of the waveform that
> > > is occurring in the DSP, it's also the time it takes
> > > when you go from transmit to receive for the received
> > > signal to get through the DSP filter and into your
> > > ears. This takes time, and is occuring during the
> > > time you would normally be listening for the
> > > "break-in" in the QSK cycle. Just about the time a
> > > breakin from the station you are working would occur,
> > > the audio is switched, you're back in transmit, and
> > > the side tone is now being routed to your ear.
> > >
> > > So the time that used to be devoted to listening for a
> > > break is now being used to process the received
> > > breakin signal and just as it is about to get to your
> > > ears, it then gets lost as the rig goes to transmit,
> > > and the next character is generated and transmitted.
> > > During this period of transmission the recieve
> > > processing is halted and its not until the received
> > > breakin signal starts into the DSP again that
> > > processing begins anew.
> > >
> > > Hence my original question, how much QSK is really
> > > necessary? Is it enough that you can be broken during
> > > during the 7 dit-length word space? Do you need to
> > > have keyers that extend the word-space period? I
> > > think it is unlikely a rig that is busy doing all this
> > > signal processing is going to ever be as good a QSK
> > > radio as my old 580 delta in therms of "breakin".
> > > Maybe if there were separate receive and transmit DSP,
> > > maybe if you had parallel co-processed transmitter and
> > > receiver so thing were not being done serially, you
> > > could approximate the behavior of the 580 delta.
> > >
> > > You may call these "bells and whistles" but it is
> > > merely an engineering design trade-off between
> > > mutually exclusive criteria. You can't receive
> > > processed audio until processing is completed, and if
> > > the rate of data transmission is faster this
> > > processing can occur in a given system, you won't be
> > > hearing any breaks. Like I said I used to judge a
> > > radio by its QSK behavior. But then I found QSK to
> > > not be as totally useful as I once thought. Really
> > > fast well executed semi-breakin does just as well in
> > > my opinion.
> > >
> > > 73 W9OY
> > >
> > >
> > >
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