This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver. I don't want to find/buy/build a CTCSS module
for it, and will have a PC handy. I imagine a WAV file could be
created, but if there is some kind of software (perhaps a "function
generator" program) that would be ideal, particularly if you could just
give it the frequency in Hz or something like that, and get a steady
sine wave out of the sound card.

Very tks,

73 Dave WB0GAZ

In article .com,
wb0gaz wrote:

This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver. I don't want to find/buy/build a CTCSS module
for it, and will have a PC handy. I imagine a WAV file could be
created, but if there is some kind of software (perhaps a "function
generator" program) that would be ideal, particularly if you could just
give it the frequency in Hz or something like that, and get a steady
sine wave out of the sound card.

Try http://www.goldwave.com/ for a Windows-based solution
(fully-functional demo version can be downloaded).

For Linux, try http://audacity.sourceforge.net/ (free)

Both of these should be able to generate, and then play, a WAV file
having a sinusoid of almost any desired frequency within the PC's
audio bandwidth. I used Audacity to generate precise sinewaves to be
used when calibrating an FM modulation meter via the Bessel-function
null method.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

In article .com,
says...

This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver. I don't want to find/buy/build a CTCSS module

snippety

What you describe is a lot like using a 40mm antiaircraft gun to
shoot down a rubber-band powered model airplane. What happens when you
suddenly need to use your sound card for something other than a PL
encoder?

$28.95 plus a little for shipping will get you a perfectly usable
dedicated CTCSS encoder, as described at this link:

http://www.com-spec.com/ss64.htm

PC's are not, contrary to popular belief, the Answer to All Things
Radio or Technical. This is one area where a dedicated purpose-built
device would be a much better investment of your time and money.

Happy tweaking.

--
Dr. Anton T. Squeegee, Director, Dutch Surrealist Plumbing Institute.
(Known to some as Bruce Lane, ARS KC7GR,
kyrrin (a/t) bluefeathertech[d=o=t]calm -- www.bluefeathertech.com
"If Salvador Dali had owned a computer, would it have been equipped
with surreal ports?"

"Dr. Anton T. Squeegee" wrote in message
news:MPG.1c982a282a8f81319896e7@localhost...
In article .com,
says...

This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver. I don't want to find/buy/build a CTCSS module

snippety

What you describe is a lot like using a 40mm antiaircraft gun to
shoot down a rubber-band powered model airplane. What happens when you
suddenly need to use your sound card for something other than a PL
encoder?

$28.95 plus a little for shipping will get you a perfectly usable
dedicated CTCSS encoder, as described at this link:

Considering the fact that the last used pc I bought (p3-500) only cost $20
including a hard drive and sound card, I could have saved $8.95 by going the
sound card route. Depending on how good your source of obsolete computers
is, you can even get them for free. The pc can then also be used for PSK31
or any other use as well. As long a portability isn't an issue the pc can
stand in for quite a bit of hardware.
thanks, John.
KC5DWD

On 8 Mar 2005 19:41:49 -0800, "wb0gaz" wrote:

This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS

If you are hopeing to get the CTCSS tone through you Microphone,
forget it. The frequency response of the Mic and Modulator will
probably prohibit any success but have a look at this link

http://www.qsl.net/ta2mbd/elektronik/af/ctcss_16c84.htm

It describes a cheap solution to your problem and it does'nt use a
steamhammer to crack a nut.
hth Mike W, G8NXD qthr

"wb0gaz" wrote in message
oups.com...
This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver. I don't want to find/buy/build a CTCSS module
for it, and will have a PC handy. I imagine a WAV file could be
created, but if there is some kind of software (perhaps a "function
generator" program) that would be ideal, particularly if you could just
give it the frequency in Hz or something like that, and get a steady
sine wave out of the sound card.

Very tks,

73 Dave WB0GAZ


Dave -

You may be missing the point of CTCSS. It is NOT like "Touch Tone" sounds
that can be insert through the microphone input and pass through the audio
chain.

Never insert the CTCSS Output (from any CTCSS encoder board or source) to
the microphone input of a radio.
The radio's microphone audio stages will distort and attenuate the CTCSS
signal (defeating the whole purpose)

The most common place to connect the CTCSS Output to is just prior to the
modulation stage in the transmitter.
Typical connections would be: to the center of the deviation pot, to the
varactor diode in the modulator circuit, or to the manufacturer's suggested
connection point. This connection point for the CTCSS can vary from radio to
radio. A schematic of the radio is very useful.

Since the CTCSS Output from your sound card may be low impedance, you may
have to install a series resistor to reduce the loading effects from the
sound card (CTCSS) Output --- depending on the interface impedance.
This is evident in the case of connecting to the center of a 10K deviation
pot. In this case, a 10K series resistor will compensate for the impedance
difference.
In addition, a slight adjustment of the voice deviation may be required to
compensate for the CTCSS Output circuit loading.

The CTCSS encoders from ComSpec or PIEXX are easy to install and less than
$50 .

gb

On 8 Mar 2005 19:41:49 -0800, "wb0gaz" wrote:

I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver.

tonegen
http://www.nch.com.au/
--
˛˛ ˛˛ Regards , SPAJKY ®
\\.//_. mail addr. @ my site @ http://www.spajky.vze.com
\°/ ".. long live & prosper.." - 3rd Anniversary running it:
|| "Tualatin OC-ed / BX-Slot1 / inaudible setup!"

Thanks for the comments - yes, I know using a PC is overkill for this,
but it is what I want to do in this case. tonegen (and searching for
"tone generator") was the clue I was looking for.

Very tks,

73 Dave WB0GAZ

"wb0gaz" wrote in message
oups.com...
This is probably not that complicated (I hope?!?) but I need a PC
program that would just tell a PC soundcard to generate a standard
CTCSS tone (example 107.2 Hz) sinewave that could be fed into an older
FM amateur transceiver. I don't want to find/buy/build a CTCSS module
for it, and will have a PC handy. I imagine a WAV file could be
created, but if there is some kind of software (perhaps a "function
generator" program) that would be ideal, particularly if you could just
give it the frequency in Hz or something like that, and get a steady
sine wave out of the sound card.

Very tks,

73 Dave WB0GAZ


Two common suppliers for CTCSS encoding and decoding solutions are ComSpec
and PIEXX.

PIEXX
http://www.piexx.com/cgi-bin/piexx.cgi?p=home.

Com-Spec
http://www.com-spec.com/index1.htm

w9gb