Picture above is my Lovely wife Karen ( N3IBN ) who says if you can't beat them join them
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Here is my Sound Card Interface Home Brew of Course Normally it has a Cover on it but for Pictures I opened it up
Total Cost of this project with Box and 13 Pin Din for my Kenwood TS-2000 $15.00 and it has a True CW Key Port
It is USB Powered Keying is done Via Right Channel Tone with Fldigi
Note: it works great with JT65 HF and Digi Pan Also works with CwType for True CW Keying and no it does not read CW
Most of the parts are from scrap dial up modems and the USB Sound card was $1.00 on Ebay
Hello let me give you a parts list and description of operation for this interface.
1 - USB Sound Card EBay $1.00
3 - Isolation Transformer 1:1 from Old Dial Up Modems
2 - 1N4148 Diode $1.99 for 100 of these guys EBay
2 - .22mf Capacitors I used .1 in parallel to get .2mf $.10 each
3 - 820K Resistor $.03 each
1 - 2N7000 MOSFET Transistor $.10 each
2 - 10K Potentiometer $.20 each
1 - 13 Pin Din $5.40
1 - Switch SPDT $.50
1 - Phone Jack 3.5mm $.10
1 - Case Radio Shack 270-238 $3.49
2 - Circuit Boards 276-159 $2.50 for both
Scrap Cable etc.
The keying circuit takes audio from right channel and passes through the full wave rectifier and powers the MOSFET for PTT, FSK and CW keying. The Pots adjust the output and input levels. Volume level must be set High for the keying circuit to work. I added some 820K resistors in series with the Pots to allow for a wider adjustment range. The Switch is after the FET to put the Pseudo FSK Tone from Fldigi to Pin 2 on my Kenwood TS-2000 Acc2 Jack for FSK.
Last modified: 2014-01-27 15:28:12, 3266 bytes
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