KPA 1500 dummy load recommendations

[Arthur Nienhouse]

______________________________________________________________
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]

[Ignacy]

I have MFJ-264 and MFJ-250. Both work. Aside from experiments , both are
gathering dust as there is little purpose of using dummy loads for
solid-state amps.
Ignacy, NO9E



--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
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]

[Don Schroder]

I also have a MFJ-264. I figured if I need a dummy load, go with one that will handle the most watts I will ever need.
I don’t have much room, the MFJ-264 id s 1.5KW dry dummy load for 1-650MHz. A little smaller than a carton of cigs.
Haven’t used it yet.

Don, KE0PVQ

Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

From: Ignacy<mailto:[hidden email]>
Sent: Monday, July 22, 2019 7:43 PM
To: [hidden email]<mailto:[hidden email]>
Subject: Re: [Elecraft] KPA 1500 dummy load recommendations

I have MFJ-264 and MFJ-250. Both work. Aside from experiments , both are
gathering dust as there is little purpose of using dummy loads for
solid-state amps.
Ignacy, NO9E



--
Sent from: http://elecraft.365791.n2.nabble.com/
______________________________________________________________
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]

[Ignacy]

I usually do testing in CW or SSB. In CW the duty cycle is 50% and in SSB
about 10% with not too much processing. A few seconds is enough to diagnose
problems.

Years ago when testing a 200W home made amp I used 2W resistor immersed in
water. Worked good enough.
Perhaps for longer duty one can use cantenna dummy load ( MFJ-250), also
immersed in water. Or attach 1-2 small fans to MFJ-264.
Ignacy, NO9E

On Wed, Jul 24, 2019 at 11:06 AM Larry Gauthier (K8UT) <[hidden email]>
wrote:

> Don,
>
> Look carefully at the power de-rating curve on your MFJ-264. I also own a
> KPA1500, and built my own DIY high power dummy load after seeing that my
> MFJ "1500 watt" dummy load can only handle 1500 watts for 8 seconds.
>
> -larry (K8UT)
>
> ------ Original Message ------
> From: "Don Schroder" <[hidden email]>
> To: "Ignacy" <[hidden email]>; "[hidden email]" <
> [hidden email]>
> Sent: 2019-07-22 21:21:09
> Subject: Re: [Elecraft] KPA 1500 dummy load recommendations
>
> I also have a MFJ-264. I figured if I need a dummy load, go with one that
> will handle the most watts I will ever need.
> I don’t have much room, the MFJ-264 id s 1.5KW dry dummy load for
> 1-650MHz. A little smaller than a carton of cigs.
> Haven’t used it yet.
>
> Don, KE0PVQ
>
> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
> Windows 10
>
> From: Ignacy<mailto:[hidden email]>
> Sent: Monday, July 22, 2019 7:43 PM
> To: [hidden email]<mailto:[hidden email]>
> Subject: Re: [Elecraft] KPA 1500 dummy load recommendations
>
> I have MFJ-264 and MFJ-250. Both work. Aside from experiments , both are
> gathering dust as there is little purpose of using dummy loads for
> solid-state amps.
> Ignacy, NO9E
>
>
>
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
> ______________________________________________________________
> 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]
>
>

______________________________________________________________
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]