Steveo wrote:
"Leland C. Scott" wrote:
The detector, indicator, device could be incorporated in to the DSP
filter assembly.

I've seen your coax run to your rented roof-top cell phone antenna,
aol-boi.

http://img205.exs.cx/my.php?loc=img2...can00036bx.jpg

Nice job, Lee C.

Shut up stalker-boi.

"Steveo" wrote in message
...
"Leland C. Scott" wrote:
The detector, indicator, device could be incorporated in to the DSP
filter assembly.

I've seen your coax run to your rented roof-top cell phone antenna,
aol-boi.

18,000 + look ups on QRZ and still counting, and I don't even do HF. 8-))

--
Leland C. Scott
KC8LDO

Linux - The alternative OS to Micro$oft Windows

On Fri, 25 Mar 2005 23:15:46 -0500, "Leland C. Scott"
wrote in :

snip
For a filter, you can run both sides
of a stereo equalizer in series, and it can even tune different audio
freqs.

The stereo equalizer idea wouldn't work, bandwidth isn't narrow enough.
However a cheap DSP based single frequency audio band filter would do the
job. As cheap as these things, DSP chips, have become it shouldn't be a big
deal.


Just for kicks I tried an old Rat Shack 10-channel (left and right
channels in series) while tuned to a CW pileup on 80m. Worked OK, you
could differentiate one tone from another, but it passed a lot of
noise. I also tried a 31-channel Sunn but the thing broke out into
oscillation...:-0 Maybe stereo equalizers aren't such a good idea.


After that, all you would need is a tone detector with a light
bulb. So the most expensive piece of equipment is already made and is
pretty common, while the other two pieces could be built from a kit by
just about anyone with a soldering iron.

The detector, indicator, device could be incorporated in to the DSP filter
assembly.


Come to think about it, how about just a 567 or 4046? Either chip
would probably do it as long as the radio doesn't drift too much. And
if I'm not mistaken, both have a VFO on the chip. So a CW 'adapter'
could be a single-chip project -- no DSP required.

But I see a big problem -- there will no doubt be some numbskull who
would turn up the oscillator all the way and key up in AM on a radio
with a disabled limiter. Gawd, think of the splatter something like
that could cause.....






----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

"Frank Gilliland" wrote in message
...
On Fri, 25 Mar 2005 23:15:46 -0500, "Leland C. Scott"
wrote in :

snip
For a filter, you can run both sides
of a stereo equalizer in series, and it can even tune different audio
freqs.

The stereo equalizer idea wouldn't work, bandwidth isn't narrow enough.
However a cheap DSP based single frequency audio band filter would do the
job. As cheap as these things, DSP chips, have become it shouldn't be a
big
deal.


Just for kicks I tried an old Rat Shack 10-channel (left and right
channels in series) while tuned to a CW pileup on 80m. Worked OK, you
could differentiate one tone from another, but it passed a lot of
noise. I also tried a 31-channel Sunn but the thing broke out into
oscillation...:-0 Maybe stereo equalizers aren't such a good idea.


After that, all you would need is a tone detector with a light
bulb. So the most expensive piece of equipment is already made and is
pretty common, while the other two pieces could be built from a kit by
just about anyone with a soldering iron.

The detector, indicator, device could be incorporated in to the DSP
filter
assembly.


Come to think about it, how about just a 567 or 4046? Either chip
would probably do it as long as the radio doesn't drift too much. And
if I'm not mistaken, both have a VFO on the chip. So a CW 'adapter'
could be a single-chip project -- no DSP required.

Those two chips are just simple PLL building blocks. There isn't a way to do
any tone filtering as such unless you make the VFO frequency range vary
narrow which would have the same effect. The 4046 has a range and frequency
offset capability using just two resistors and a capacitor. You would want
to use the phase-frequency detector, not the simple XOR phase detector which
could lock on harmonics of the audio tone. That would be the chip to use.
The lock detect circuit could then be used as the visual signal device for
CW. Something this simple you could breadboard in an evening to see how it
works.

Here's some interesting links you may like to look over.

http://web.telia.com/~u85920178/conv/syn-info.htm#intro
http://web.telia.com/~u85920178/right_01.htm


--
Leland C. Scott
KC8LDO

Linux - The alternative OS to Micro$oft Windows

On Thu, 24 Mar 2005 16:24:29 -0800, Frank Gilliland
wrote:

If the FCC only permits voice communication on CB, doesn't that
prevent deaf people from using the band? I think TTY, as well as CW,
should be permitted for that reason alone. If it became a petition,
would it pass?


No.

Dave
"Sandbagger"
http://home.ptd.net/~n3cvj

quoting:
If the FCC only permits voice communication on CB, doesn't that
prevent deaf people from using the band? I think TTY, as well as CW,
should be permitted for that reason alone. If it became a petition,
would it pass?


Channel 23 is shared with radio control, which allows all kinds of
things. If you did it on 23, you just might be ok.