[TenTec] NAR filter in Omni VI

[Ken Brown]

>I don't see how changing the filter will affect clicks. Clicks are generated by rise 
>times in the keying circuit. Others here can respond to that issue better than I. 
>  
>
Many rigs key the transmitter in CW by keying a DC offset to the 
balanced mixer, unbalancing it and letting carrier through. This carrier 
then passes through the the 2.4 kHz ( or other bandwidth not far from 
this ) IF filter that is used in SSB TX to select only one of the 
sidebands coming out of the balanced mixer. This filter limits the 
bandwidth of the SSB signal, and if the keyed carrier CW signal has 
clicks it will also limit the bandwidth of the clicks.

Using the IF filter to limit the bandwicth of the clicks is a sort of 
band-aid approach to patch a problem that should not be there in the 
first place. Proper rise and fall times and shapes of the keying 
envelope are the right way to do it.

DE N6KB