Marc Vaillant
  • Male
  • North Conway, NH
  • United States

Marc Vaillant's Discussions

What circuit for computer audio out to key rig?
24 Replies

Started this discussion. Last reply by Chuck aa0hw Apr 6.

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Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Just a note on how the audio volume effects the Audio Derived CW keying circuits output to KEY the cw jack of a rig...too much volume into the switch,  your cw elements will be longer than the original,  too little volume into the switch,…"
Apr 6
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Measure the input and output impedance of your own setup using this online calculator http://www.sengpielaudio.com/calculator-InputOutputImpedance.htm Here are some results of the output impedance of some of my sound cards using this…"
Apr 30, 2013
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"HERE IS A GOOD EXAMPLE OF KEYING A CODE PRACTICE OSCILLATOR USING THE FLDIGI QSK ON RT CHANNEL FEATURE This audio file demonstrates FLdigi's QSK FEATURE, on the RT CHANNEL, keying an old HEATHKIT CODE PRACTICE OSCILLATOR at about 75 wpm. The…"
Apr 29, 2013
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Here is a picture of FLdigi's audio derived keying voltage compared to the actual RF output of my rig.   FLdigi does a great job of producing the exact cw element lengths using its QSK FUNCTION for audio derived cw keying."
Apr 27, 2013
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Here is a picture of FLdigi's audio voltage(bottom) going into the switch compared to the actual key closure.  FLdigi's QSK function does a great job of keying the rigs cw jack and duplicating the exact cw element lengths as you can…"
Apr 27, 2013
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Here is an article about using the QSK ON RT CHANNEL feature of FLdigi to key a rig  in AFCW MODE.  Improve the QSK of any rig using AFCW and the FLdigi QSK ON RT CHANNEL method. I have used this method on my old ICOM 735 and it was…"
Apr 26, 2013
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Just using Joe's advice to increase the GRAPHIC EQUALIZER's midrange frequencies all the way.. I did a measurement with my AMPROBE METER, of the "native" RMS AUDIO VOLTAGE  coming out of the sound card (with no load)  -…"
Apr 26, 2013
Chuck aa0hw replied to Marc Vaillant's discussion What circuit for computer audio out to key rig?
"Excellent, Joe !  Great idea ... Here is a picture of Joe's AUDIO MANAGER Here is a picture of my REALTEK HD AUDIO MANAGER's EQUALIZER Just go to your control panel to find your AUDIO MANAGER for your computer Here are a couple of…"
Apr 26, 2013

Profile Information

Your Call Sign
kb1ooo
How many years have you been performing QRQ CW
Been a Ham for just over a year. Still trying to get to QRQ.
Max speed is 30wpm head copy right now.
Your favorite key, paddle or bug
Black Widow paddle
Your Rig, Antenna and RF Power
Rig: Wilderness SST 30M
Ant: End fed half wave vertical.
Pow: 2 Watts.
Your QSK preferences
Full.

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