Elecraft

K3s Crystal Filter Config Qustion

Classic

List

Threaded

4 messages Options

Bill Leonard N0CU

K3s Crystal Filter Config Qustion

I am uncertain on how to configure the radio's filters using the K3 Utility. I have the 6 KHz & 2.8 KHz filters. I am totally confused by Cady's book, which shows (pg 27) almost all of the ENABLE boxes checked. This doesn't make any sense to me since I doubt the hardware can be configured with all four filters inline, and even if it could, why would anyone want to use a 350 Hz filter on AM.

I assume that I check one box for each mode depending on which filter I want used.

Thanks,

Bill N0CU

Elecraft mailing list

Re: K3s Crystal Filter Config Qustion

In the utility, you tell the K3 which filters are installed. They kick
in when you narrow the DSP to within their range. You can select when
they kick in in another setting.

Buck
k4ia K3 #101
Honor Roll 335
8 Band DXCC

On 7/3/2016 10:23 AM, Bill Leonard N0CU wrote:

> I am uncertain on how to configure the radio's filters using the K3 Utility.
> I have the 6 KHz & 2.8 KHz filters. I am totally confused by Cady's book,
> which shows (pg 27) almost all of the ENABLE boxes checked. This doesn't
> make any sense to me since I doubt the hardware can be configured with all
> four filters inline, and even if it could, why would anyone want to use a
> 350 Hz filter on AM.
>
> I assume that I check one box for each mode depending on which filter I want
> used.
>
> Thanks,
>
> Bill N0CU
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K3s-Crystal-Filter-Config-Qustion-tp7619541.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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]
>

______________________________________________________________
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]

Dick Dievendorff-4

Re: K3s Crystal Filter Config Qustion

In reply to this post by Bill Leonard N0CU

Only one filter is used at a time. They are not cascaded. Check all the boxes for which the filter might be useful. K3 firmware selects the crystal filter based on the bandwidth you choose with the width knob, from those filters you choose to enable for the mode you are in.

For example, if you enable all the filters for CW, you should be able to see which Xtal filter is used from the LCD display as you change the bandwidth knob. If you have, for example a 250, 400, and 2.7 kHz filter and all are enabled in CW, then at bandwidths 250 and below the 250 Hz filter is chosen, bandwidth 300 to 400 the 400 Hz filter is chosen, and above bandwidth 450 the 2.7 kHz filter is chosen.

This all applies for receive.

For TX, the rules are pretty rigid, and only one filter is involved per mode.

73 de Dick, K6KR

73 de Dick, K6KR

> On Jul 3, 2016, at 07:23, Bill Leonard N0CU <[hidden email]> wrote:
>
> I am uncertain on how to configure the radio's filters using the K3 Utility.
> I have the 6 KHz & 2.8 KHz filters. I am totally confused by Cady's book,
> which shows (pg 27) almost all of the ENABLE boxes checked. This doesn't
> make any sense to me since I doubt the hardware can be configured with all
> four filters inline, and even if it could, why would anyone want to use a
> 350 Hz filter on AM.
>
> I assume that I check one box for each mode depending on which filter I want
> used.
>
> Thanks,
>
> Bill N0CU
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/K3s-Crystal-Filter-Config-Qustion-tp7619541.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> ______________________________________________________________
> 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]

Don Wilhelm

Re: K3s Crystal Filter Config Qustion

In reply to this post by Bill Leonard N0CU

Bill,

The fact is that the receive filters can be configured for whatever you
want.
Of course, it is not productive to enable a 400Hz filter for SSB or AM,
but the check boxes will allow that if you desire.

Use some sense, and configure the filters that you have installed in
your K3/K3S in a reasonable manner. If you have the 2.1 or 1.8 filters
installed, you would want to select them for SSB RX, but selecting the
1.0kHz for SSB (or AM) would be "iffy" - similarly any filters that are
more narrow.

The filters that you select for any particular mode will determine which
filters will be 'stepped through' as you rotate the width (or
HiCut/LoCut) knob.

Yes, check the boxes for each mode only for the filters that you want to
use for that mode.

For transmit, the filter requirements are more stringent. Select the
2.7(2.8)kHz filter for CW, SSB and Data TX and the 6kHz filter for AM
and ESSB TX and the 13kHz filter for FM TX.

73,
Don W3FPR

On 7/3/2016 10:23 AM, Bill Leonard N0CU wrote:
> I am uncertain on how to configure the radio's filters using the K3 Utility.
> I have the 6 KHz & 2.8 KHz filters. I am totally confused by Cady's book,
> which shows (pg 27) almost all of the ENABLE boxes checked. This doesn't
> make any sense to me since I doubt the hardware can be configured with all
> four filters inline, and even if it could, why would anyone want to use a
> 350 Hz filter on AM.
>
>

______________________________________________________________
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]