K3 Suddenly no power out / high SWR on 10m only

[Iain MacDonnell - N6ML-2]

So I was happily running (100w) in the 10m RTTY contest, when suddenly
my stream of callers ground to a halt. I looked at the meter, and saw
that I wasn't making any (significant) power any more (~1w). The K3 is
reporting high SWR, but an external meter is not. All other bands are
transmitting fine (incl. 6m). The antenna is OK (hears well, and
another transmitter sees normal SWR on it). What would cause high SWR
/ no power out on 10m only?

TIA,

    ~iain / N6ML
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[Iain MacDonnell - N6ML-2]

It just occurred to me that I have a 10m BPF (on a switching matrix)
between the K3 and the external meter. Perhaps that's blown. This is
at a remote site, so I can't unplug it to check :/

    ~iain / N6ML


On Sun, Dec 2, 2012 at 11:48 AM, iain macdonnell - N6ML <[hidden email]> wrote:

> So I was happily running (100w) in the 10m RTTY contest, when suddenly
> my stream of callers ground to a halt. I looked at the meter, and saw
> that I wasn't making any (significant) power any more (~1w). The K3 is
> reporting high SWR, but an external meter is not. All other bands are
> transmitting fine (incl. 6m). The antenna is OK (hears well, and
> another transmitter sees normal SWR on it). What would cause high SWR
> / no power out on 10m only?
>
> TIA,
>
>     ~iain / N6ML

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[k6dgw]

Wrong antenna selected on that band?  I guess you'd have to have a
separate receive antenna since you say it hears OK.  Similar goof on me
when I was new to the K3.  Everything was fine everywhere except 30m
where the SWR was 99:1 and no output.  Talked to Gary, he finally said
he'd elevate it to Wayne, who asked for a time to call me and he did.
Said, "Let's start with the easy stuff.  Which antenna is selected."  I
selected ANT1, and of course everything was fine.  They're remembered by
band.

I'm not holding my breath for a call from Mr. Yaesu-san if my FT-847
quits. :-)

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2013 Cal QSO Party 5-6 Oct 2013
- www.cqp.org

On 12/2/2012 11:48 AM, iain macdonnell - N6ML wrote:
> So I was happily running (100w) in the 10m RTTY contest, when suddenly
> my stream of callers ground to a halt. I looked at the meter, and saw
> that I wasn't making any (significant) power any more (~1w). The K3 is
> reporting high SWR, but an external meter is not. All other bands are
> transmitting fine (incl. 6m). The antenna is OK (hears well, and
> another transmitter sees normal SWR on it). What would cause high SWR
> / no power out on 10m only?


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[Iain MacDonnell - N6ML-2]

Thanks, Fred, but, alas, no, it's nothing that simple. It suddenly
"broke" while I was in the middle of a run... and I don't have a 10m
RX antenna.

73,

    ~iain / N6ML


On Sun, Dec 2, 2012 at 12:24 PM, Fred Jensen <[hidden email]> wrote:

> Wrong antenna selected on that band?  I guess you'd have to have a separate
> receive antenna since you say it hears OK.  Similar goof on me when I was
> new to the K3.  Everything was fine everywhere except 30m where the SWR was
> 99:1 and no output.  Talked to Gary, he finally said he'd elevate it to
> Wayne, who asked for a time to call me and he did. Said, "Let's start with
> the easy stuff.  Which antenna is selected."  I selected ANT1, and of course
> everything was fine.  They're remembered by band.
>
> I'm not holding my breath for a call from Mr. Yaesu-san if my FT-847 quits.
> :-)
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2013 Cal QSO Party 5-6 Oct 2013
> - www.cqp.org
>
>
> On 12/2/2012 11:48 AM, iain macdonnell - N6ML wrote:
>>
>> So I was happily running (100w) in the 10m RTTY contest, when suddenly
>> my stream of callers ground to a halt. I looked at the meter, and saw
>> that I wasn't making any (significant) power any more (~1w). The K3 is
>> reporting high SWR, but an external meter is not. All other bands are
>> transmitting fine (incl. 6m). The antenna is OK (hears well, and
>> another transmitter sees normal SWR on it). What would cause high SWR
>> / no power out on 10m only?
>
>
>
> ______________________________________________________________
> 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

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