Elecraft

KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

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NK7Z

KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

Hello,
My KAT500 which worked yesterday, now shows a 3:1 on 18 MHz., only.
Antenna is a single feedline to a 6BTV, and an analyzer says all is good
at low power. At 100 watts, all seems good.

All other bands seem OK at high power.

Question: When in bypass, is the entire tuner bypassed?
Question: When turned off is the tuner bypassed? Which antenna is default?
--
73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources
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Dick Dievendorff-4

Re: KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

When unpowered the KAT500 is bypassed, ANT1.

When the ATU is in mode BYP, yes, it’s bypassed.

73 de Dick, K6KR

> On Sep 13, 2020, at 15:52, Dave Cole <[hidden email]> wrote:
>
> Hello,
> My KAT500 which worked yesterday, now shows a 3:1 on 18 MHz., only. Antenna is a single feedline to a 6BTV, and an analyzer says all is good at low power. At 100 watts, all seems good.
>
> All other bands seem OK at high power.
>
> Question: When in bypass, is the entire tuner bypassed?
> Question: When turned off is the tuner bypassed? Which antenna is default?
> --
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist
> ARRL Asst. Director, NW Division, Technical Resources
> ______________________________________________________________
> 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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Ken Winterling

Re: KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

When you have issues like this the best test is to use a known good dummy
load. That removes the antenna system from the equation. See what happens
on 18mHz when transmitting into the summy load.

Ken
WA2LBI

On Sun, Sep 13, 2020 at 6:58 PM Dick Dievendorff <[hidden email]> wrote:

> When unpowered the KAT500 is bypassed, ANT1.
>
> When the ATU is in mode BYP, yes, it’s bypassed.
>
> 73 de Dick, K6KR
>
> > On Sep 13, 2020, at 15:52, Dave Cole <[hidden email]> wrote:
> >
> > Hello,
> > My KAT500 which worked yesterday, now shows a 3:1 on 18 MHz., only.
> Antenna is a single feedline to a 6BTV, and an analyzer says all is good at
> low power. At 100 watts, all seems good.
> >
> > All other bands seem OK at high power.
> >
> > Question: When in bypass, is the entire tuner bypassed?
> > Question: When turned off is the tuner bypassed? Which antenna is
> default?
> > --
> > 73, and thanks,
> > Dave (NK7Z)
> > https://www.nk7z.net
> > ARRL Volunteer Examiner
> > ARRL Technical Specialist
> > ARRL Asst. Director, NW Division, Technical Resources
> > ______________________________________________________________
> > 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]

NK7Z

Re: KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

In reply to this post by Dick Dievendorff-4

That helps triage the issue... Something in my antenna must have gone
wonky... I am using a 6BTV, with the 18 Meter add on kit, so the same
feedpoint is used for all bands, and they are fine... I was worried it
was the tuner. I'll go check the antenna out tonight, and in the
morning as well... THANK YOU! Knowing the tuner is bypassed in Bypass,
helps... Next is to put a dummy load on the tuner...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 9/13/20 3:57 PM, Dick Dievendorff wrote:

> When unpowered the KAT500 is bypassed, ANT1.
>
> When the ATU is in mode BYP, yes, it’s bypassed.
>
> 73 de Dick, K6KR
>
>> On Sep 13, 2020, at 15:52, Dave Cole <[hidden email]> wrote:
>>
>> Hello,
>> My KAT500 which worked yesterday, now shows a 3:1 on 18 MHz., only. Antenna is a single feedline to a 6BTV, and an analyzer says all is good at low power. At 100 watts, all seems good.
>>
>> All other bands seem OK at high power.
>>
>> Question: When in bypass, is the entire tuner bypassed?
>> Question: When turned off is the tuner bypassed? Which antenna is default?
>> --
>> 73, and thanks,
>> Dave (NK7Z)
>> https://www.nk7z.net
>> ARRL Volunteer Examiner
>> ARRL Technical Specialist
>> ARRL Asst. Director, NW Division, Technical Resources
>> ______________________________________________________________
>> 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]

NK7Z

Re: KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

In reply to this post by Ken Winterling

Thanks Ken... That is the next step... Now I need to locate one...

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 9/13/20 4:24 PM, Ken Winterling wrote:

> When you have issues like this the best test is to use a known good
> dummy load. That removes the antenna system from the equation. See what
> happens on 18mHz when transmitting into the summy load.
>
> Ken
> WA2LBI
>
>
>
>
> On Sun, Sep 13, 2020 at 6:58 PM Dick Dievendorff <[hidden email]
> <mailto:[hidden email]>> wrote:
>
> When unpowered the KAT500 is bypassed, ANT1.
>
> When the ATU is in mode BYP, yes, it’s bypassed.
>
> 73 de Dick, K6KR
>
> > On Sep 13, 2020, at 15:52, Dave Cole <[hidden email]
> <mailto:[hidden email]>> wrote:
> >
> > Hello,
> > My KAT500 which worked yesterday, now shows a 3:1 on 18 MHz.,
> only. Antenna is a single feedline to a 6BTV, and an analyzer says
> all is good at low power. At 100 watts, all seems good.
> >
> > All other bands seem OK at high power.
> >
> > Question: When in bypass, is the entire tuner bypassed?
> > Question: When turned off is the tuner bypassed? Which antenna
> is default?
> > --
> > 73, and thanks,
> > Dave (NK7Z)
> > https://www.nk7z.net
> > ARRL Volunteer Examiner
> > ARRL Technical Specialist
> > ARRL Asst. Director, NW Division, Technical Resources
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> <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] <mailto:[hidden email]>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email] <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] <mailto:[hidden email]>
>

NK7Z

Re: KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

In reply to this post by Ken Winterling

Hi ken,
Added the dummy, no problems, so it is the antenna... Also, given it is
a 6BTV with the 18 meter add on, and all other bands work, it is not the
feedline...

This makes it simple to fix! It is either a break with the laws of
physics as we understand them today-- or a connection has come loose.
Given there are only two connections... I suspect it will be a simple fix.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 9/13/20 4:24 PM, Ken Winterling wrote:

Ken Winterling

Re: KAT500: Fails to tune, and shows 3:1 on good antenna on 18 MHz.

GL!

Ken
WA2LBI

On Mon, Sep 14, 2020 at 7:53 AM Dave Cole <[hidden email]> wrote:

> Hi ken,
> Added the dummy, no problems, so it is the antenna... Also, given it is
> a 6BTV with the 18 meter add on, and all other bands work, it is not the
> feedline...
>
> This makes it simple to fix! It is either a break with the laws of
> physics as we understand them today-- or a connection has come loose.
> Given there are only two connections... I suspect it will be a simple fix.
>
> 73, and thanks,
> Dave (NK7Z)
> https://www.nk7z.net
> ARRL Volunteer Examiner
> ARRL Technical Specialist
> ARRL Asst. Director, NW Division, Technical Resources
>
> On 9/13/20 4:24 PM, Ken Winterling wrote:
> > When you have issues like this the best test is to use a known good
> > dummy load. That removes the antenna system from the equation. See what
> > happens on 18mHz when transmitting into the summy load.
> >
> > Ken
> > WA2LBI
> >
> >
> >
> >
> > On Sun, Sep 13, 2020 at 6:58 PM Dick Dievendorff <[hidden email]
> > <mailto:[hidden email]>> wrote:
> >
> > When unpowered the KAT500 is bypassed, ANT1.
> >
> > When the ATU is in mode BYP, yes, it’s bypassed.
> >
> > 73 de Dick, K6KR
> >
> > > On Sep 13, 2020, at 15:52, Dave Cole <[hidden email]
> > <mailto:[hidden email]>> wrote:
> > >
> > > Hello,
> > > My KAT500 which worked yesterday, now shows a 3:1 on 18 MHz.,
> > only. Antenna is a single feedline to a 6BTV, and an analyzer says
> > all is good at low power. At 100 watts, all seems good.
> > >
> > > All other bands seem OK at high power.
> > >
> > > Question: When in bypass, is the entire tuner bypassed?
> > > Question: When turned off is the tuner bypassed? Which antenna
> > is default?
> > > --
> > > 73, and thanks,
> > > Dave (NK7Z)
> > > https://www.nk7z.net
> > > ARRL Volunteer Examiner
> > > ARRL Technical Specialist
> > > ARRL Asst. Director, NW Division, Technical Resources
> > > ______________________________________________________________
> > > Elecraft mailing list
> > > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > > Help: http://mailman.qth.net/mmfaq.htm
> > > Post: mailto:[hidden email]
> > <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] <mailto:[hidden email]>
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email] <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] <mailto:[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]