[Elecraft] Use FM filter for AM listening??

[4Z5TO]

I use the FM filter also for AM among other things. For easier configuration
use, use the the "K3 Utility" application to set your filters. Works great
and you will see exactly what your set-up is. Also, you can backup your K3
configuration here too.

73



Dan-17 wrote:
> 
> I have K3 s/n 3020 with firmware 3.11.
> I'm planning to upgrade firmware at the next release--I didn't see 3.14 as
> important for me.
> 
> I've been using the K3 on 80 through 20 mostly, with great success and
> satisfaction--I love this radio.
> 
> I have in filter locations 1-4
> 1 - 13 khz, 0 gain, 0 offset
> 2 - 2.7 khz 5-pole, 0 gain, -.85 offset
> 3 - 1.8 khz 8-pole, 0 gain, 0 offset
> 4 - .4 khz 8-pole, 2 gain, 0 offset
> 
> I did NOT get the AM filter because I did not plan on transmitting AM.
> 
> I DID get the FM filter because I want to listen to AM (broadcast band and
> SW), and possibly operate on 10 meter FM.
> 
> When I try to use the FM filter for AM listening, the results are very
> poor.  Specifically, poor bass and significant ringing, even when adjusted
> for max bandwidth, which shows as 5 khz on the display.
> 
> If I turn the FM filter off, and use the 2.7 khz 5-pole filter for AM
> listening, the results are much better--no ringing and a more open sound
> with better bass.
> 
> The FM filter bandwidth is set for 13 khz in the config menu.
> 
> Did I make an error in judgment when I purchased the FM filter for AM
> listening, or am I experiencing a technical problem?
> 
> I have not tried to use the FM filter for 10 meter FM because I haven't
> heard any detectable signals at my location.
> 
> Thanks,
> Dan - W4TQ
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