I took a look at the referenced PDF.? We have had Stephen (WA8LMF) give talks at club meetings.?
He makes a lot of good information available to the HAM community.?
And it has been my experience that he knows the information he posts to be accurate, so I will leave that part alon.
The PDF clearly shows the peak detector circuit to control the PTT.
What I still find in your diagram vs. the PDF diagram:
? Sound card audio has a 500 ohm 'volume control' after the 10k resistor when the sound card is in use.? You leave out that resistor.
? The PDF shows an option for adding a larger parallel capacitor to increase the PTT tail.?
????? I'd suggest choosing the value you need (say try 0.047uF and determine what works for you) and leave it without an option.
? I think you want the LEDs in parallel (not series),
?I didn't add the 500 ohm Mic level control.
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Rob KB8RCO
