Elecraft

630 meter operation on the K4

Classic

List

Threaded

11 messages Options

Nigel

630 meter operation on the K4

Wondering what capabilities the K4 will have on this (these) bands...

73
Nigel
Wa6MSE
______________________________________________________________
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]

wayne burdick

Re: 630 meter operation on the K4

Administrator

The K4 has receive capability in this band, and will transmit at the XV OUT jack well in excess of 0 dBm. (More like +7.) This should be suitable for use with an external amplifier.

Wayne
N6KR

> On Sep 14, 2020, at 8:10 AM, Nigel Lemaire <[hidden email]> wrote:
>
> Wondering what capabilities the K4 will have on this (these) bands...
>
> 73
> Nigel
> Wa6MSE
> ______________________________________________________________
> 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]

Ed Gray W0SD

K4 Second RX and VHF

I keep trying to find a picture for months of the inside of the K4 but I
can not find one so I give up and will ask? How is the second RX
handled mechanically. I just hate the box in the K3S for the second
RX. What a pain as you have to take it out to do things with the
filters and all the cabling and routing to me is not good. I hope this
is all gone in the K4.

Secondly how will VHF be handled in the K4? Again I am not a big fan of
the cabling involved in the K3S for VHF. A plug is computer type slot,
etc. sure seems like it would be better.

Ed W0SD

______________________________________________________________
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]

wayne burdick

Re: K4 Second RX and VHF

Administrator

The KRX4 option (which turns a K4 into a K4D) comes with two modules: a plug-in digital downconverter board, and a plug-in receiver board. One of them lives in the digital compartment and the other in the RF compartment, which are already shielded from each other, so no additional shielding is needed.

The cabling requirements are simple (coax with very sturdy MCX plugs): one to bring RF into the receiver module, and another to get the filtered receiver output signal to the digital downconverter.

The internal transverter module has its own built-in shield that doesn't have to be removed to do installation. But to ensure signal integrity it requires short, high-quality coax cables for its antenna (ANT4 on the rear panel) as well as for its I.F. input and output.

73,
Wayne
N6KR

> On Sep 14, 2020, at 9:44 AM, Ed Gray W0SD <[hidden email]> wrote:
>
> I keep trying to find a picture for months of the inside of the K4 but I can not find one so I give up and will ask? How is the second RX handled mechanically. I just hate the box in the K3S for the second RX. What a pain as you have to take it out to do things with the filters and all the cabling and routing to me is not good. I hope this is all gone in the K4.
>
> Secondly how will VHF be handled in the K4? Again I am not a big fan of the cabling involved in the K3S for VHF. A plug is computer type slot, etc. sure seems like it would be better.
>
> Ed W0SD
>
>
> ______________________________________________________________
> 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]

Jim AB3CV

Re: 630 meter operation on the K4

In reply to this post by wayne burdick

Will the band be evident or will it need to be added? Will there be an
appropriate XV offset to allow direct reading of the frequency?

Thanks!

jim ab3cv

On Mon, Sep 14, 2020 at 12:35 PM Wayne Burdick <[hidden email]> wrote:

> The K4 has receive capability in this band, and will transmit at the XV
> OUT jack well in excess of 0 dBm. (More like +7.) This should be suitable
> for use with an external amplifier.
>
> Wayne
> N6KR
>
>
> > On Sep 14, 2020, at 8:10 AM, Nigel Lemaire <[hidden email]> wrote:
> >
> > Wondering what capabilities the K4 will have on this (these) bands...
> >
> > 73
> > Nigel
> > Wa6MSE
> > ______________________________________________________________
> > 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]
>

Jim AB3CV

Re: 630 meter operation on the K4

And will the K4 need to be in "Test" mode as the K3 was required?

jim ab3cv

On Mon, Sep 14, 2020 at 1:25 PM Jim Miller <[hidden email]> wrote:

> Will the band be evident or will it need to be added? Will there be an
> appropriate XV offset to allow direct reading of the frequency?
>
> Thanks!
>
> jim ab3cv
>
> On Mon, Sep 14, 2020 at 12:35 PM Wayne Burdick <[hidden email]> wrote:
>
>> The K4 has receive capability in this band, and will transmit at the XV
>> OUT jack well in excess of 0 dBm. (More like +7.) This should be suitable
>> for use with an external amplifier.
>>
>> Wayne
>> N6KR
>>
>>
>> > On Sep 14, 2020, at 8:10 AM, Nigel Lemaire <[hidden email]> wrote:
>> >
>> > Wondering what capabilities the K4 will have on this (these) bands...
>> >
>> > 73
>> > Nigel
>> > Wa6MSE
>> > ______________________________________________________________
>> > 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]
>>
>

wayne burdick

Re: 630 meter operation on the K4

Administrator

You can directly set the frequency to this range. There's no need for a transverter band.

Test mode will not be needed.

For receive purposes, you can use any of the five antenna jacks. I just measured the MDS at -135 dBm, which is more than satisfactory on on this band.

For transmit you'll need to use XV OUT and an external amplifier.

73,
Wayne
N6KR

> On Sep 14, 2020, at 10:26 AM, Jim Miller <[hidden email]> wrote:
>
> And will the K4 need to be in "Test" mode as the K3 was required?
>
> jim ab3cv
>
>
> On Mon, Sep 14, 2020 at 1:25 PM Jim Miller <[hidden email]> wrote:
> Will the band be evident or will it need to be added? Will there be an appropriate XV offset to allow direct reading of the frequency?
>
> Thanks!
>
> jim ab3cv
>
> On Mon, Sep 14, 2020 at 12:35 PM Wayne Burdick <[hidden email]> wrote:
> The K4 has receive capability in this band, and will transmit at the XV OUT jack well in excess of 0 dBm. (More like +7.) This should be suitable for use with an external amplifier.
>
> Wayne
> N6KR
>
>
> > On Sep 14, 2020, at 8:10 AM, Nigel Lemaire <[hidden email]> wrote:
> >
> > Wondering what capabilities the K4 will have on this (these) bands...
> >
> > 73
> > Nigel
> > Wa6MSE
> > ______________________________________________________________
> > 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]

Jim AB3CV

Re: 630 meter operation on the K4

Nice!!

Thanks for the update!

jim ab3cv

On Mon, Sep 14, 2020 at 2:11 PM Wayne Burdick <[hidden email]> wrote:

> You can directly set the frequency to this range. There's no need for a
> transverter band.
>
> Test mode will not be needed.
>
> For receive purposes, you can use any of the five antenna jacks. I just
> measured the MDS at -135 dBm, which is more than satisfactory on on this
> band.
>
> For transmit you'll need to use XV OUT and an external amplifier.
>
> 73,
> Wayne
> N6KR
>
>
> > On Sep 14, 2020, at 10:26 AM, Jim Miller <[hidden email]> wrote:
> >
> > And will the K4 need to be in "Test" mode as the K3 was required?
> >
> > jim ab3cv
> >
> >
> > On Mon, Sep 14, 2020 at 1:25 PM Jim Miller <[hidden email]> wrote:
> > Will the band be evident or will it need to be added? Will there be an
> appropriate XV offset to allow direct reading of the frequency?
> >
> > Thanks!
> >
> > jim ab3cv
> >
> > On Mon, Sep 14, 2020 at 12:35 PM Wayne Burdick <[hidden email]>
> wrote:
> > The K4 has receive capability in this band, and will transmit at the XV
> OUT jack well in excess of 0 dBm. (More like +7.) This should be suitable
> for use with an external amplifier.
> >
> > Wayne
> > N6KR
> >
> >
> > > On Sep 14, 2020, at 8:10 AM, Nigel Lemaire <[hidden email]> wrote:
> > >
> > > Wondering what capabilities the K4 will have on this (these) bands...
> > >
> > > 73
> > > Nigel
> > > Wa6MSE
> > > ______________________________________________________________
> > > 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]
>
>

Randy Farmer-2

Re: K4 Second RX and VHF

In reply to this post by wayne burdick

The demise of TMP connectors? Hooray!

73...
Randy, W8FN

On 9/14/2020 1:00 PM, Wayne Burdick wrote:
> The cabling requirements are simple (coax_*with very sturdy MCX plugs*_): one to bring RF into the receiver module, and another to get the filtered receiver output signal to the digital downconverter.
______________________________________________________________
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]

wayne burdick

Re: 630 meter operation on the K4

Administrator

In reply to this post by Jim AB3CV

By the way, the K4 provides a way to do direct comparative sensitivity measurements for both receivers. A persistent display in relative dB can be shown. This makes things like MDS testing very easy.

73,
Wayne
N6KR

> On Sep 14, 2020, at 11:14 AM, Jim Miller <[hidden email]> wrote:
>
> Nice!!
>
> Thanks for the update!
>
> jim ab3cv
>
> On Mon, Sep 14, 2020 at 2:11 PM Wayne Burdick <[hidden email]> wrote:
> You can directly set the frequency to this range. There's no need for a transverter band.
>
> Test mode will not be needed.
>
> For receive purposes, you can use any of the five antenna jacks. I just measured the MDS at -135 dBm, which is more than satisfactory on on this band.
>
> For transmit you'll need to use XV OUT and an external amplifier.
>
> 73,
> Wayne
> N6KR
>
>
> > On Sep 14, 2020, at 10:26 AM, Jim Miller <[hidden email]> wrote:
> >
> > And will the K4 need to be in "Test" mode as the K3 was required?
> >
> > jim ab3cv
> >
> >
> > On Mon, Sep 14, 2020 at 1:25 PM Jim Miller <[hidden email]> wrote:
> > Will the band be evident or will it need to be added? Will there be an appropriate XV offset to allow direct reading of the frequency?
> >
> > Thanks!
> >
> > jim ab3cv
> >
> > On Mon, Sep 14, 2020 at 12:35 PM Wayne Burdick <[hidden email]> wrote:
> > The K4 has receive capability in this band, and will transmit at the XV OUT jack well in excess of 0 dBm. (More like +7.) This should be suitable for use with an external amplifier.
> >
> > Wayne
> > N6KR
> >
> >
> > > On Sep 14, 2020, at 8:10 AM, Nigel Lemaire <[hidden email]> wrote:
> > >
> > > Wondering what capabilities the K4 will have on this (these) bands...
> > >
> > > 73
> > > Nigel
> > > Wa6MSE
> > > ______________________________________________________________
> > > 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]
>

Wes Stewart-2

Re: K4 Second RX and VHF

In reply to this post by Randy Farmer-2

Amen. RIP

On 9/14/2020 11:22 AM, Randy Farmer wrote:

> The demise of TMP connectors? Hooray!
>
> 73...
> Randy, W8FN
>
> On 9/14/2020 1:00 PM, Wayne Burdick wrote:
>> The cabling requirements are simple (coax_*with very sturdy MCX plugs*_): one
>> to bring RF into the receiver module, and another to get the filtered
>> receiver output signal to the digital downconverter.
> ______________________________________________________________
> 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]