[Elecraft] Re: [K3] Transmit AM through FM Filter?

Dan Atchison n3nd at aol.com
Sat Jun 28 07:51:00 EDT 2008


Thanks for all the answers. To set the story straight, the reasoning 
behind the question was not to determine if I could transmit "hi-fi" 
AM, it's simply a matter of cost. At $125 a clip for an AM filter and 
the fact that I may only transmit AM once or twice in a lifetime, I 
couldn't see the extra cost to add the AM filter if TX through the FM 
filter worked.

Since others have already identified that a filter can be "fooled" into 
thinking it's a different bandwidth, I do have a plan that I'll try 
somewhere down the road. Looking at the schematics it appears to be an 
easy solution that I can use an empty filter spot and diode switch (add 
two diodes) that position into an FM filter consumed location. That 
empty spot would be designated as the AM filter spot.

Yeah, I know, it's only $125, but I'm a cheapskate.

73,
Dan -- N3ND


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