k3s AM receive

[Rick Dwight]

I am going to order a K3S and have my filter selection figured out OK for CW and SSB.  However I want to do a little BCB and SWL listening on AM.  At this time no plans to transmit AM.  I live in rural Alaska and there are no strong BCB or SW broadcast stations close to my QTH.  Is there any reason to equip my my K3S with either the 6 kHz or FM filter roofing filters for AM reception or will the DSP filter do the job.  I realize that if I want to tx AM I will need to install the 6kHz filter.  My interests are 99% CW and my cw filters will include the 700Hz filter which I have already obtained.       Thanks,  Rick  KL7CW
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[Joe Subich, W4TV-4]

 > Is there any reason to equip my my K3S with either the 6 kHz or FM
 > filter roofing filters for AM reception or will the DSP filter do the
 > job.  I realize that if I want to tx AM I will need to install the
 > 6kHz filter.

If you expect to receive AM as AM you will need either the 6 KHz
(AM) filter or 13 KHz (FM) filter.  You can receive BCB AM using
the stock 2.7 or 2.8 KHz filter but you must receive the AM signal
as if it was USB or LSB and zero beat the carrier.  Doing so will
give you significantly restricted frequency response - barely good
enough for "Talk Radio".

73,

   ... Joe, W4TV


On 6/25/2016 2:37 PM, Rick Dwight wrote:
> I am going to order a K3S and have my filter selection figured out OK
> for CW and SSB.  However I want to do a little BCB and SWL listening
> on AM.  At this time no plans to transmit AM.  I live in rural Alaska
> and there are no strong BCB or SW broadcast stations close to my QTH.
> Is there any reason to equip my my K3S with either the 6 kHz or FM
> filter roofing filters for AM reception or will the DSP filter do the
> job.  I realize that if I want to tx AM I will need to install the
> 6kHz filter.  My interests are 99% CW and my cw filters will include
> the 700Hz filter which I have already obtained.
 > Thanks,  Rick KL7CW
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[Guy Olinger K2AV]

After some years of both a 13 and 6 kHz filter in my K3 with sub-RX, I gave
up on the 13 kHz as not being particularly useful as I wound up never
listening to FM on my K3.

On the other hand I frequently4 used the 6 kHz filter on AM in the "Sync"
mode, which uses USB and LSB demodulation, but locks onto the AM carrier
frequency. This does music well, not super hifi by any means, but it has
the singular advantage of locking on the carrier and listening to the upper
OR lower sideband with the filter removing the opposite sideband. If there
is QRM to the broad AM signal that is not an on-channel AM signal, it will
usually be on one side or another. The shift control will move the filter
placement between carrier plus upper sideband and carrier plus lower
sideband. The display always shows the carrier frequency.

Of late I use AM Sync mode all the time by habit with width set to max.

And by all means get the KBPF3A.

Since I do diversity listening, I have the 6 kHz filter and KBPF3A on both
main and sub RX.

We have an oldies station on 850 AM here. I wondered why the upper sideband
didn't sound as clear as the lower. When I got a P3, the reason why was
obvious. They were transmitting it that way. So I just set the shift for
LSB.

At any rate, good luck.
73, Guy K2AV

On Sat, Jun 25, 2016 at 2:37 PM, Rick Dwight <[hidden email]> wrote:

> I am going to order a K3S and have my filter selection figured out OK for
> CW and SSB.  However I want to do a little BCB and SWL listening on AM.  At
> this time no plans to transmit AM.  I live in rural Alaska and there are no
> strong BCB or SW broadcast stations close to my QTH.  Is there any reason
> to equip my my K3S with either the 6 kHz or FM filter roofing filters for
> AM reception or will the DSP filter do the job.  I realize that if I want
> to tx AM I will need to install the 6kHz filter.  My interests are 99% CW
> and my cw filters will include the 700Hz filter which I have already
> obtained.       Thanks,  Rick  KL7CW
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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[k6dgw]

Oldies Station?  Maybe an RCA Amplifuzz TX.  Notoriously hard to get
into alignment.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 6/25/2016 9:39 PM, Guy Olinger K2AV wrote:

> We have an oldies station on 850 AM here. I wondered why the upper sideband
> didn't sound as clear as the lower. When I got a P3, the reason why was
> obvious. They were transmitting it that way. So I just set the shift for
> LSB.

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