[Elecraft] K3 AM receive bandwidth

[Joe Subich, W4TV]

> My question is this; when I select AM mode, is this filter in the
> signal path or is it bypassed?

In the signal path.

> If I were to add the 6 khz filter, would AM mode fidelity improve?

Most certainly.  While you can receive 2.8 KHz AM with the 2.8 KHz
filter *IF* you enable the synch detector, the 6 KHz filter will give
you about 3 to 3.5 KHz audio with the normal envelope detector.

 > I only care about receiving, not transmitting.

If you only care about receiving, consider the "FM" (13 KHz) filter.
That one will give you ~4.5 KHz audio with the envelope detector and
allow you to transmit AM if you ever want to do so as well as transmit
and receive FM (above 29.5 MHz, 6 meters and 2 Meters with the 2M
transverter if you chose to install it).


73,

    ... Joe, W4TV






On 2015-02-08 2:15 PM, GDR wrote:
>
> The widest filter in my K3 is the 2.8 kHZ in the main receiver. It
> also has the general coverage accessory for SWLing. My question is
> this; when I select AM mode, is this filter in the signal path or is
> it bypassed? If I were to add the 6 khz filter, would AM mode
> fidelity improve? I only care about receiving, not transmitting.
>
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