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KAT4

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Sportdaddy

KAT4

I can see from the literature that is on the website that the KAT4 ATU will handle a 10:1 matching range but don’t see what the power handling capabilities are.

Anyone know?

73
Charles
W4PPP

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David Bunte

Re: KAT4

Charles -

I don't "know" what the power handling capabilities are, but think I can
safely assume that if it is in the K4 it can handle the power of the K4. I
trust that Wayne, Eric, or someone else who "knows" the answer will chime
in when they are able.

73 de Dave - K9FN

On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]>
wrote:

> I can see from the literature that is on the website that the KAT4 ATU
> will handle a 10:1 matching range but don’t see what the power handling
> capabilities are.
>
> Anyone know?
>
> 73
> Charles
> W4PPP
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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Charlie T, K3ICH

Re: KAT4

Well this MAY be a valid question, since I believe for example, the IC-7300 and/or IC-7610 have an "emergency" mode where the power is cut back to 50 watts and the allowable tuner's SWR range is extended from its normal full power mismatch capability.
If I remember correctly, its only 3:1 at 100 W, but will match an "emergency" use antenna if you have to.

10: 1 capability DOES put some hefty restraints on an internal tuner.

73, Charlie k3ICH

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of David Bunte
Sent: Monday, April 20, 2020 9:03 AM
To: Charles Sells <[hidden email]>
Cc: [hidden email]
Subject: Re: [Elecraft] KAT4

Charles -

I don't "know" what the power handling capabilities are, but think I can safely assume that if it is in the K4 it can handle the power of the K4. I trust that Wayne, Eric, or someone else who "knows" the answer will chime in when they are able.

73 de Dave - K9FN

On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]>
wrote:

> I can see from the literature that is on the website that the KAT4 ATU
> will handle a 10:1 matching range but don’t see what the power
> handling capabilities are.
>
> Anyone know?
>
> 73
> Charles
> W4PPP
>
> ______________________________________________________________
> 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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Sportdaddy

Re: KAT4

In reply to this post by David Bunte

Dave

It would be really nice if it would handle the 500 watts that the KPA500 puts out.

That might be wishful thinking.

73
Charles
W4PPP

From: David Bunte <[hidden email]>
Date: Monday, April 20, 2020 at 9:03 AM
To: Charles Sells <[hidden email]>
Cc: "[hidden email]" <[hidden email]>
Subject: Re: [Elecraft] KAT4

Charles -

I don't "know" what the power handling capabilities are, but think I can safely assume that if it is in the K4 it can handle the power of the K4. I trust that Wayne, Eric, or someone else who "knows" the answer will chime in when they are able.

73 de Dave - K9FN

On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]<mailto:[hidden email]>> wrote:
I can see from the literature that is on the website that the KAT4 ATU will handle a 10:1 matching range but don’t see what the power handling capabilities are.

Anyone know?

73
Charles
W4PPP

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Nr4c

Re: KAT4

In reply to this post by Sportdaddy

It’s an internal accessory for a 100 Watt transmitter. I’d guess it will handle up to 150 Watts or so.

Sent from my iPhone
...nr4c. bill

> On Apr 20, 2020, at 8:26 AM, Charles Sells <[hidden email]> wrote:
>
> I can see from the literature that is on the website that the KAT4 ATU will handle a 10:1 matching range but don’t see what the power handling capabilities are.
>
> Anyone know?
>
> 73
> Charles
> W4PPP
>
> ______________________________________________________________
> 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
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Nr4c

Re: KAT4

In reply to this post by Sportdaddy

Guys. The KAT4 is installed inside the K4 transceiver. It could not be used with an external amplifier. The matching unit for the KPA500 must go between the Amp output and the antenna.

Sent from my iPhone
...nr4c. bill

> On Apr 20, 2020, at 9:55 AM, Charles Sells <[hidden email]> wrote:
>
> Dave
>
> It would be really nice if it would handle the 500 watts that the KPA500 puts out.
>
> That might be wishful thinking.
>
> 73
> Charles
> W4PPP
>
> From: David Bunte <[hidden email]>
> Date: Monday, April 20, 2020 at 9:03 AM
> To: Charles Sells <[hidden email]>
> Cc: "[hidden email]" <[hidden email]>
> Subject: Re: [Elecraft] KAT4
>
> Charles -
>
> I don't "know" what the power handling capabilities are, but think I can safely assume that if it is in the K4 it can handle the power of the K4. I trust that Wayne, Eric, or someone else who "knows" the answer will chime in when they are able.
>
> 73 de Dave - K9FN
>
> On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]<mailto:[hidden email]>> wrote:
> I can see from the literature that is on the website that the KAT4 ATU will handle a 10:1 matching range but don’t see what the power handling capabilities are.
>
> Anyone know?
>
> 73
> Charles
> W4PPP
>
> ______________________________________________________________
> 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
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john@kk9a.com

Re: KAT4

In reply to this post by Sportdaddy

You would get much better performance fixing a 10:1 SWR antenna than
using a KAT4 tuner. For starters you will loose 1/2 your power just
going though 100 ft of RG213 at 14Mhz.

John KK9A

[Elecraft] KAT4
Charles Sells charles at sellsfamily.net
Mon Apr 20 08:24:12 EDT 2020
Previous message: [Elecraft] Elecraft CW Net Report
Next message: [Elecraft] KAT4

I can see from the literature that is on the website that the KAT4 ATU
will handle a 10:1 matching range but don’t see what the power
handling capabilities are.

Anyone know?

73
Charles
W4PPP

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Jay Rutherford-3

Re: KAT4

In reply to this post by David Bunte

Hi Charles,

I think you're confusing the KAT4 tuner inside the K4 and the KAT500 tuner. The former will handle the maximum power that the K4 can put out barefoot. If you want to run the KPA500 amp and need a tuner, you will need the KAT500 tuner for that purpose.

At least that is my understanding!

73
Jay K3BH

On Mon, Apr 20, 2020, at 09:02, David Bunte wrote:

> Charles -
>
> I don't "know" what the power handling capabilities are, but think I can
> safely assume that if it is in the K4 it can handle the power of the K4. I
> trust that Wayne, Eric, or someone else who "knows" the answer will chime
> in when they are able.
>
> 73 de Dave - K9FN
>
> On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]>
> wrote:
>
> > I can see from the literature that is on the website that the KAT4 ATU
> > will handle a 10:1 matching range but don’t see what the power handling
> > capabilities are.
> >
> > Anyone know?
> >
> > 73
> > Charles
> > W4PPP
> >
> > ______________________________________________________________
> > 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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wayne burdick

Re: KAT4

Administrator

In reply to this post by john@kk9a.com

The KAT4 is rated at 120 W to match the K4.

Some competing ATUs only go to 3:1 or so. For someone on a small lot trying to use all bands, or during field operation, allowing for up to 10:1 means you use antennas on bands on which they're not resonant.

73,
Wayne
N6KR

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Nr4c

Re: KAT4

In reply to this post by Charlie T, K3ICH

The K3 line has had this same range ATU from the beginning.

Sent from my iPhone
...nr4c. bill

> On Apr 20, 2020, at 1:31 PM, Charlie T <[hidden email]> wrote:
>
> Well this MAY be a valid question, since I believe for example, the IC-7300 and/or IC-7610 have an "emergency" mode where the power is cut back to 50 watts and the allowable tuner's SWR range is extended from its normal full power mismatch capability.
> If I remember correctly, its only 3:1 at 100 W, but will match an "emergency" use antenna if you have to.
>
> 10: 1 capability DOES put some hefty restraints on an internal tuner.
>
> 73, Charlie k3ICH
>
>
>
>
> -----Original Message-----
> From: [hidden email] <[hidden email]> On Behalf Of David Bunte
> Sent: Monday, April 20, 2020 9:03 AM
> To: Charles Sells <[hidden email]>
> Cc: [hidden email]
> Subject: Re: [Elecraft] KAT4
>
> Charles -
>
> I don't "know" what the power handling capabilities are, but think I can safely assume that if it is in the K4 it can handle the power of the K4. I trust that Wayne, Eric, or someone else who "knows" the answer will chime in when they are able.
>
> 73 de Dave - K9FN
>
>> On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]>
>> wrote:
>>
>> I can see from the literature that is on the website that the KAT4 ATU
>> will handle a 10:1 matching range but don’t see what the power
>> handling capabilities are.
>>
>> Anyone know?
>>
>> 73
>> Charles
>> W4PPP
>>
>> ______________________________________________________________
>> 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
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> Help: http://mailman.qth.net/mmfaq.htm
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>
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>
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Bob McGraw - K4TAX

Re: KAT4

In reply to this post by Charlie T, K3ICH

Per the manual, the KAT3A internal tuner for the K3S will match a SWR
range of 10:1 with a 100 watt power rating. {page 79} And it will
match a 20:1 SWR range with a 10 watt power rating. I've never
encountered any of my crazy antennas that it wouldn't match.

73

Bob, K4TAX

On 4/20/2020 8:35 AM, Charlie T wrote:

> Well this MAY be a valid question, since I believe for example, the IC-7300 and/or IC-7610 have an "emergency" mode where the power is cut back to 50 watts and the allowable tuner's SWR range is extended from its normal full power mismatch capability.
> If I remember correctly, its only 3:1 at 100 W, but will match an "emergency" use antenna if you have to.
>
> 10: 1 capability DOES put some hefty restraints on an internal tuner.
>
> 73, Charlie k3ICH
>
>
>
>
> -----Original Message-----
> From: [hidden email] <[hidden email]> On Behalf Of David Bunte
> Sent: Monday, April 20, 2020 9:03 AM
> To: Charles Sells <[hidden email]>
> Cc: [hidden email]
> Subject: Re: [Elecraft] KAT4
>
> Charles -
>
> I don't "know" what the power handling capabilities are, but think I can safely assume that if it is in the K4 it can handle the power of the K4. I trust that Wayne, Eric, or someone else who "knows" the answer will chime in when they are able.
>
> 73 de Dave - K9FN
>
> On Mon, Apr 20, 2020 at 8:25 AM Charles Sells <[hidden email]>
> wrote:
>
>> I can see from the literature that is on the website that the KAT4 ATU
>> will handle a 10:1 matching range but don’t see what the power
>> handling capabilities are.
>>
>> Anyone know?
>>
>> 73
>> Charles
>> W4PPP
>>
>> ______________________________________________________________
>> 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
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> Post: mailto:[hidden email]
>
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Doug Turnbull

Re: KAT4

Bob is right, I have even loaded a standard G5RV on 160M to make my first top band QSOs with the K3 at around 100W. I was not working the antenna against ground. It is an amazing tuner, well done Elecraft.
73 Doug EI2CN

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of Bob McGraw K4TAX
Sent: Monday 20 April 2020 20:38
To: [hidden email]
Subject: Re: [Elecraft] KAT4

Per the manual, the KAT3A internal tuner for the K3S will match a SWR range of 10:1 with a 100 watt power rating. {page 79} And it will match a 20:1 SWR range with a 10 watt power rating. I've never encountered any of my crazy antennas that it wouldn't match.

73

Bob, K4TAX

On 4/20/2020 8:35 AM, Charlie T wrote:

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