[Elecraft] [K3] Elecraft roofing filters

[Joe Subich, W4TV]

> I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. 
> And also filters for AM and FM.

The difference between the 250 and 400 Hz filters is not 
enough to be worthwhile (approximately 375 Hz vs. 430 Hz). 
If you want a narrow filter get the Elecraft 200 Hz 5-pole 
unit. 

In addition, you should not need both the FM and AM filters 
if the firmware was fixed to allow the use of the FM filter 
for ESSB and AM transmit.  If you plan to use the AM filter
only for receiving, that is even more reason to bypass the 
AM roofer and leave a space for the 1.5 or 1.8 KHz SSB filter. 

73, 

   ... Joe, W4TV 
  


> ------Original Message------
> From: Kjeld Holm
> Sender: elecraft-bounces at mailman.qth.net
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] [K3] Elecraft roofing filters
> Sent: Feb 5, 2009 11:27 AM
> 
> Dear all,
> 
> Thanks for all the kind answers.
> 
> Sorry for all that fuss. Somehow I mixed up everything so I 
> ended up thinking of some nonsense like 1.0 kHz for SSB. :-o
> 
> I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. 
> And also filters for AM and FM.
> 
> Vy 73
> OZ1CCM Kjeld
>