[Central-Electronics] 100V sweep results

[K6JEK]

Inquiring minds want to know so here it is.

In our last episode I adjusted the 100V for maximum opposite sideband  
suppression at 1 kHz just as CE recommends.   Last night I swept it  
using a Flex Radio SDR 1000 as a spectrum analyzer.   It's good for  
this purpose.

As adjusted now, the opposite sideband is approximately 30 dB  
everywhere except for a broad dip at 1 kHz to 45 dB down and a slight  
peak to only 25 dB suppression at about 400 Hz.   This isn't good  
enough so more fiddling is warranted.

The frequency response was very flat out to about 4 kHz then a  
gradual roll off.   This is caused by the audio filter.

Thanks for the various suggestions

Jon