[Elecraft] Real world use of 1.8 filter

Bill W4ZV btippett at alum.mit.edu
Sat Jan 14 08:03:09 EST 2012


W2BLC wrote
> 
> Most of my operating is SSB rag chew on 75 and 40 meters. I love 
> arm-chair copy and do use outboard Behringer products to that end on RX 
> only. The K3 is probably overkill for my use, but I think it would be 
> enjoyable.
> 
> Would I get my money's worth from the 1.8 filter? Or, would I find the 
> 2.8 8-pole filter used in conjunction with the DSP to be adequate?
> 

Based on what you wrote above, you should be fine with the stock 5-pole 2.7k
and IMHO don't even need the 2.8k (i.e. save your $140).  

1.  Ragchewing:  2.7k is fine
2.  DXing or contest S&Ping:  1.8k (when you DO have time for precise
tuning)
3.  Contest running at high rates (>150 Qs/hr):  2.1k (when you DON'T have
time)

I recently swapped my 1.8k for a 2.1k because of #3 above:

http://elecraft.365791.n2.nabble.com/K3-Trade-my-1-8k-for-your-2-1k-filter-tt7158423.html#a7161493

73,  Bill  W4ZV




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