[Elecraft] Elecraft Digest, Vol 248, Issue 6

Fri Dec 20 13:56:52 EST 2024

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On Friday, December 20, 2024, 12:39 PM, f6eju via Elecraft <elecraft at mailman.qth.net> wrote:

Thanks to unsubscribe me.
Regards

Jean claude Buffet f6eju
F6eju at orange.fr

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Objet : Elecraft Digest, Vol 248, Issue 6

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Today's Topics:

  1. Re: Airplane instruments issue (Mike Short)
  2. KPA500 Issue? (Paul Ecker)
  3. Re: KPA500 Issue? (Rick NK7I)
  4. Re: KPA500 Issue? (Paul Ecker)
  5. Re: KPA500 Issue? (Jack Brindle)
  6. Re: KPA500 Issue? (Rick NK7I)

----------------------------------------------------------------------

Message: 1
Date: Thu, 19 Dec 2024 13:16:05 -0600
From: Mike Short <ai4ns.mike at gmail.com>
To: Elecraft <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] Airplane instruments issue
Message-ID:
    <CAL7rsnE+TW5oXb_BZxFvzGcT_--5Usd6aS1aXGYmMU0kyO=cZg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Need a recommendation for a USB oscilloscope still. Want to monitor the
power bus while the plane is flying to see if there are spikes or noise that
may be causing the monitor to go haywire.

On Sun, Nov 17, 2024 at 10:13 Mike Short <ai4ns.mike at gmail.com> wrote:

> My son has a Piper Cherokee and recently installed a Electronics 
> international cgr30p monitor system. It worked fine for several months 
> and has now started randomly reporting impossible results for engine 
> temperature, fuel flow rates considerably higher than pump can 
> deliver, etc.
>
> The wiring harness inside and the monitor have been replaced or 
> verified by the manufacturer. He has a breakout box that allows 
> shutting off individual data lines. No provision to monitor lines though.
>
>  would like to monitor the DC bus and see if there is an AC component 
> being injected somehow. I would like recommendations for a USB 
> oscilloscope that would be suitable. I also have a RF explorer 50khz 
> to 960MHZ that I could use to monitor radiated noise.
>
> Can anyone help me with this?
>
> Mike
> AI4NS
>

------------------------------

Message: 2
Date: Thu, 19 Dec 2024 15:18:06 -0500
From: Paul Ecker <eckerpw at gmail.com>
To: elecraft at mailman.qth.net
Subject: [Elecraft] KPA500 Issue?
Message-ID:
    <CAJDGaPNM6b2qzZh6wAKWSg-BnhJi5Fp4P=qk7BaufD3HXZMOCg at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Jack & Bill
Problem resolved sorta of.
Solution: Discovered my own forgetfulness or senior brainfart !!
I had forgotten that I had antenna 2 connected directly to the K4D for
Diversity purposes, and not connected to the KAT500.
Which brings up probably a dumb question. When I transmit on this antenna
connected to Ant 2 on the K4, I see power out on the K4 meter, isn't it
still traveling the same path thru the KPA-KAT.  Why am I seeing zero on the
KPA power meter?

73 Paul w2eck

------------------------------

Message: 3
Date: Thu, 19 Dec 2024 12:44:22 -0800
From: Rick NK7I <rick.nk7i at gmail.com>
To: Paul Ecker <eckerpw at gmail.com>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA500 Issue?
Message-ID: <4F7923FF-50AD-4834-8277-316F071C8D5A at gmail.com>
Content-Type: text/plain; charset=utf-8

If it?s not passing through the KPA, how would it read power?

73,
Rick nk7i

> On Dec 19, 2024, at 12:18?PM, Paul Ecker <eckerpw at gmail.com> wrote:
> 
> ?Jack & Bill
> Problem resolved sorta of.
> Solution: Discovered my own forgetfulness or senior brainfart !!
> I had forgotten that I had antenna 2 connected directly to the K4D for 
> Diversity purposes, and not connected to the KAT500.
> Which brings up probably a dumb question. When I transmit on this 
> antenna connected to Ant 2 on the K4, I see power out on the K4 meter, 
> isn't it still traveling the same path thru the KPA-KAT.  Why am I 
> seeing zero on the KPA power meter?
> 
> 73 Paul w2eck
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
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> 
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> rick.nk7i at gmail.com

------------------------------

Message: 4
Date: Thu, 19 Dec 2024 15:52:48 -0500
From: Paul Ecker <eckerpw at gmail.com>
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA500 Issue?
Message-ID:
    <CAJDGaPMZV6CB-iP4sO0w+zHV6AEB=VgeBD8+Qo4h-c38fKYo9A at mail.gmail.com>
Content-Type: text/plain; charset="UTF-8"

Rick
You are quite correct as I look at it again - as I said - not a good
question So the  issue is closed - thanks for help gentlemen

73 Paul w2eck

On Thu, Dec 19, 2024 at 3:44?PM Rick NK7I <rick.nk7i at gmail.com> wrote:

> If it?s not passing through the KPA, how would it read power?
>
> 73,
> Rick nk7i
>
> > On Dec 19, 2024, at 12:18?PM, Paul Ecker <eckerpw at gmail.com> wrote:
> >
> > ?Jack & Bill
> > Problem resolved sorta of.
> > Solution: Discovered my own forgetfulness or senior brainfart !!
> > I had forgotten that I had antenna 2 connected directly to the K4D 
> > for Diversity purposes, and not connected to the KAT500.
> > Which brings up probably a dumb question. When I transmit on this 
> > antenna connected to Ant 2 on the K4, I see power out on the K4 
> > meter, isn't it still traveling the same path thru the KPA-KAT.  Why 
> > am I seeing zero on the KPA power meter?
> >
> > 73 Paul w2eck
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:Elecraft at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net Please help support this 
> > email list: http://www.qsl.net/donate.html Message delivered to 
> > rick.nk7i at gmail.com
>

------------------------------

Message: 5
Date: Thu, 19 Dec 2024 14:56:26 -0600
From: Jack Brindle <jackbrindle at me.com>
To: Paul Ecker <eckerpw at gmail.com>
Cc: elecraft at mailman.qth.net
Subject: Re: [Elecraft] KPA500 Issue?
Message-ID: <D2A19D4B-5DB2-4AD3-847A-A660C7F3F4F3 at me.com>
Content-Type: text/plain;    charset=utf-8

I agree with Rick on this one. There are three antenna ports on the KAT500,
and four (I believe) on the K4. Don?t confuse KAT500 Antenna 2 with K4
Antenna 2, they are not the same port.
Only one output from the K4 goes to the KPA500 and then to the KAT500. If
the K4 has Antenna 2 selected, and the KPA is connected to Antenna 1, then
the KPA will see no power in.
With no power in, there will be no power out. But the antenna connected to
K4 Antenna 2 will see power.

You might want to draw a diagram showing the station components (K4, KPA500
and KAT500), add which control program handles each, then post it to remind
you what will happen when you select various ports.

73,
Jack, W6FB

> On Dec 19, 2024, at 2:18?PM, Paul Ecker <eckerpw at gmail.com> wrote:
> 
> Jack & Bill
> Problem resolved sorta of.
> Solution: Discovered my own forgetfulness or senior brainfart !!
> I had forgotten that I had antenna 2 connected directly to the K4D for 
> Diversity purposes, and not connected to the KAT500.
> Which brings up probably a dumb question. When I transmit on this 
> antenna connected to Ant 2 on the K4, I see power out on the K4 meter, 
> isn't it still traveling the same path thru the KPA-KAT.  Why am I 
> seeing zero on the KPA power meter?
> 
> 73 Paul w2eck
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> jackbrindle at me.com

------------------------------

Message: 6
Date: Thu, 19 Dec 2024 13:19:49 -0800
From: Rick NK7I <rick.nk7i at gmail.com>
To: Jack Brindle <jackbrindle at me.com>
Cc: elecraft at mailman.qth.net, Paul Ecker <eckerpw at gmail.com>
Subject: Re: [Elecraft] KPA500 Issue?
Message-ID: <EF39B614-33A6-467B-9414-B3541EDFFE54 at gmail.com>
Content-Type: text/plain; charset=utf-8

Because of random mental gas releases (brain farts); I try to simplify as
much as I can.  In the heat of the DX/contest moment, small thing matter so
make them simple.

My K4 antenna port 1 is relabeled ?KPA1500? and port 2 is ?Dummy? (the load,
not the operator).

You may wish to do similar, using the tools that Elecraft designed into the
K4.

73,
Rick nk7i

> On Dec 19, 2024, at 12:57?PM, Jack Brindle via Elecraft
<elecraft at mailman.qth.net> wrote:
> 
> ?I agree with Rick on this one. There are three antenna ports on the
KAT500, and four (I believe) on the K4. Don?t confuse KAT500 Antenna 2 with
K4 Antenna 2, they are not the same port.
> Only one output from the K4 goes to the KPA500 and then to the KAT500. If
the K4 has Antenna 2 selected, and the KPA is connected to Antenna 1, then
the KPA will see no power in.
> With no power in, there will be no power out. But the antenna connected to
K4 Antenna 2 will see power.
> 
> You might want to draw a diagram showing the station components (K4, 
> KPA500 and KAT500), add which control program handles each, then post it
to remind you what will happen when you select various ports.
> 
> 73,
> Jack, W6FB
> 
> 
>> On Dec 19, 2024, at 2:18?PM, Paul Ecker <eckerpw at gmail.com> wrote:
>> 
>> Jack & Bill
>> Problem resolved sorta of.
>> Solution: Discovered my own forgetfulness or senior brainfart !!
>> I had forgotten that I had antenna 2 connected directly to the K4D 
>> for Diversity purposes, and not connected to the KAT500.
>> Which brings up probably a dumb question. When I transmit on this 
>> antenna connected to Ant 2 on the K4, I see power out on the K4 
>> meter, isn't it still traveling the same path thru the KPA-KAT.  Why 
>> am I seeing zero on the KPA power meter?
>> 
>> 73 Paul w2eck
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net Please help support this 
>> email list: http://www.qsl.net/donate.html Message delivered to 
>> jackbrindle at me.com
> 
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net Please help support this email 
> list: http://www.qsl.net/donate.html Message delivered to 
> rick.nk7i at gmail.com

------------------------------

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