[Lowfer] its been good to know ye

John Andrews w1tag at w1tag.com
Thu Mar 1 11:00:23 EST 2007


ddswl wrote:
> Get a filter that filters out 550 to 1700, I got mine form Grove's. 
> Works great!!

However, if IMD is being generated in the preamp, then inserting the 
filter between the preamp and receiver won't cure it. The usual IMD 
products in these cases, are 2nd order, just simple mixing of strong 
signals. If you depend on filtering, you have to do it BEFORE the damage 
is done.

John Andrews



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