Topic: CW on CQ100 (1 replies)
#1     Sun Mar 08, 2009 3:34 pm
Altamont, NY
Join Date: Oct 2008
Posts: 92
Subject: CW on CQ100

I want to use a straight key. So the way I figure it, I can use a tone generator ( sent into either a USB mic converter ( or into the analog line input on the computer's sound board.

Sounds simple - think it'll work?
#2     Tue Aug 04, 2009 1:57 am
Holly Hill, FL
Join Date: Aug 2007
Posts: 23
Subject: Yep!!! It'll work!!!

Hey Bill:

Occasionally, I must use a code practice oscillator instead of Dahdidah to send code on QSONET.

My kit includes the MFJ 554 ($90) Sine Wave Output Classroom Code Practice Oscillator, a Vibroplex Standard Original Bug, a Vibroplex Deluxe Straight Key and two cables. One cable has a 1/4 inch mono audio plug that goes to the key input of the CPO. The other end of that cable has 2 gator clips to connect to the keys.

The second cable is a length of RG-58 (it's what I had laying around) with an 1/8 inch mono plug on one end and a 1/8 stereo plug on the other. I opened the cable in the middle and wired a .1 microfarad low voltage cap in series with the center conductor for isolation and crude impedance matching. It works very well. Nice clean tone and no clicks, pops or buzzes.

I adjust the pitch to my liking on the CPO. The volume knob sets the level on the CQ100 transceiver. I monitor my transmit audio in the computer so I can hear what I'm sending.

The CQ100 is set for VOX operation mode with sensitivity set at 8 and Dwell set at 1 second. Works great!!!

It's not as nice as running Dahdidah but it works well and allows me to enjoy the CW experience on QSONET.

Good luck with your setup.


Frank KB4T

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