K3 AM receive bandwidth

[dennis rosenbalm]

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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[Joe Subich, W4TV-4]

> 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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> email list: http://www.qsl.net/donate.html Message delivered to
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[Elecraft mailing list]

if you have the SSB filter the AM mode will use it for Receive


I have the AM and the FM filter in my main receiver and for RX it only used the AM filterIn my sub receiver I have only the FM filter and it used that for AM receive
If you are interested in AM receive only the FM filter may be the one to add first


      From: GDR <[hidden email]>
 To: "[hidden email]" <[hidden email]>
 Sent: Sunday, February 8, 2015 2:15 PM
 Subject: [Elecraft] K3 AM receive bandwidth
   

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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