Elecraft

AM operation of the K line

Classic

List

Threaded

6 messages Options

Elecraft mailing list

AM operation of the K line

Anyone have any experiences or suggestions for using the K3s, KPA500 and KAT500 on 80 meter AM?

73 - Mike - K9JRI
______________________________________________________________
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]

Bob McGraw - K4TAX

Re: AM operation of the K line

Sure, works great. As configured for SSB switching to AM mode runs
about 125 watts of carrier from the KPA500. No different than
operating SSB, just switch the K3S to AM. Must have the 6 kHz filter
installed.

73

Bob, K4TAX

On 12/9/2018 4:03 PM, Michael Blake via Elecraft wrote:

> Anyone have any experiences or suggestions for using the K3s, KPA500 and KAT500 on 80 meter AM?
>
> 73 - Mike - K9JRI
> ______________________________________________________________
> 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]
>

Mark Musick

Re: AM operation of the K line

Or the 13 kHz filter. Both the 6 and 13 kHz filters can be used for AM.

73,
Mark, WB9CIF

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Bob McGraw K4TAX
Sent: Monday, December 10, 2018 01:09
To: [hidden email]
Subject: Re: [Elecraft] AM operation of the K line

Sure, works great. As configured for SSB switching to AM mode runs about 125 watts of carrier from the KPA500. No different than operating SSB, just switch the K3S to AM. Must have the 6 kHz filter installed.

73

Bob, K4TAX

On 12/9/2018 4:03 PM, Michael Blake via Elecraft wrote:

______________________________________________________________
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]

Bob McGraw - K4TAX

Re: AM operation of the K line

Yes true, however I don't suggest using the 13 kHz filter for AM
transmit in view of transmit bandwidth considerations. The 6 kHz
filter is more appropriate and thus does limit the transmit bandwidth to
the required limits of the regulations. 97.101(a)

73

Bob, K4TAX

On 12/9/2018 7:15 PM, Mark Musick wrote:
> Or the 13 kHz filter. Both the 6 and 13 kHz filters can be used for AM.
>
> 73,
> Mark, WB9CIF
>

______________________________________________________________
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]

Grant Youngman-2

Re: AM operation of the K line

I don’t think the AM transmit bandwidth relies on the filter to set its limits. Even with the 13KHz filter, bandwidth is limited by the DSP. The option to use the 13KHz filter was, as I recall, a change made by Elecraft quite some time ago. While there are many opinions, there is no bandwidth specified by 97.101(a), and at its worse, it’s tighter than most of the vintage and other modern AM gear in use legally on the amateur bands.

Grant NQ5T
K3 #2091 KX3 #8342

> On Dec 9, 2018, at 8:26 PM, Bob McGraw K4TAX <[hidden email]> wrote:
>
> Yes true, however I don't suggest using the 13 kHz filter for AM transmit in view of transmit bandwidth considerations. The 6 kHz filter is more appropriate and thus does limit the transmit bandwidth to the required limits of the regulations. 97.101(a)
>

______________________________________________________________
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]

W2xj

Re: AM operation of the K line

It’s not the best idea to use RF filtering to limit audio bandwidth.

Sent from my iPhone

> On Dec 9, 2018, at 17:43, Grant Youngman <[hidden email]> wrote:
>
> I don’t think the AM transmit bandwidth relies on the filter to set its limits. Even with the 13KHz filter, bandwidth is limited by the DSP. The option to use the 13KHz filter was, as I recall, a change made by Elecraft quite some time ago. While there are many opinions, there is no bandwidth specified by 97.101(a), and at its worse, it’s tighter than most of the vintage and other modern AM gear in use legally on the amateur bands.
>
> Grant NQ5T
> K3 #2091 KX3 #8342
>
>> On Dec 9, 2018, at 8:26 PM, Bob McGraw K4TAX <[hidden email]> wrote:
>>
>> Yes true, however I don't suggest using the 13 kHz filter for AM transmit in view of transmit bandwidth considerations. The 6 kHz filter is more appropriate and thus does limit the transmit bandwidth to the required limits of the regulations. 97.101(a)
>>
>
> ______________________________________________________________
> 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]