re [Elecraft] bandwidth select on am mode re K3

[Joe Subich, W4TV]

> For Amateur FM operation, the K3 FM filter is required.  
> Occupied bandwidth of the usual signal is nearly 13 kHz, 
> the width of the K3 FM filter.  Use of a 6 kHz filter 
> results in horrendous distortion on both Tx and Rx.

OK, that makes "sense" in terms of old standards.  It seems 
strange not to use 2 KHz deviation (6 KHz bandwidth) to allow 
better spectrum utilization but that's a subject for another 
forum. 

73, 

   ... Joe, W4TV 
  


> -----Original Message-----
> From: Lyle Johnson [mailto:kk7p at wavecable.com] 
> Sent: Thursday, March 27, 2008 6:53 PM
> To: Joe Subich, W4TV
> Cc: elecraft at mailman.qth.net
> Subject: Re: re [Elecraft] bandwidth select on am mode re K3
> 
> 
> > What deviation (bandwidth) is used for FM on 10 meters?  Would 
> > a 6 KHz filter work there or are the "channels" overlapping? 
> 
> For Amateur FM operation, the K3 FM filter is required.  Occupied 
> bandwidth of the usual signal is nearly 13 kHz, the width of 
> the K3 FM 
> filter.  Use of a 6 kHz filter results in horrendous 
> distortion on both 
> Tx and Rx.
> 
> 73,
> 
> Lyle KK7P
>