![]() ![]() I use a home brew interface for PSK31 on my IC-735 and HTX-100 and they both work fine. Together, both taps should allow you to control the audio levels from your computer. Of course, make sure you have the microphone unplugged when your operating JT-65. Another 1 uF coupling capacitor should be used and tied to the C47 and C48. Similarly, I would go around the speech amplifier (U4b) so that the audio input is not controlled by the Mike Gain. I would use about a 1 uF capacitor from the junction of R1, R4, and R42 (volume control). This will provide you with a constant audio level that is not affected by the volume control. For the audio output, I would tap off the tip of the volume control. If you move it a little further, to 14.070, you can so PSK31 as well.įor interfacing with your computer you could take the simple route and connect through the microphone connector and the speaker connection. I don't think you should have a problem moving the tuning range down to 14.076. ![]()
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