Tuesday, April 06, 2004 Zulu
LM1458 vs LM833 op amp in PSK-20

I tried upgrading the LM1458 op amp used as the audio amplifier in my PSK-20 to an LM833, as recommended by N4WFS in his eHam.net review. Here are the before and after specrum images. Of course, time passed, QSB happens, and stations change. But I didn't note a big difference. Maybe it will help with improving the blocking dynamic range when strong signals are present.

- posted by Leigh @ 04:18 z
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