KXPA100, KXAT100 & Digital

[David Patino]

Didn't see the information on the website, is the KXAT100 capable of handling 100 watts with digital modes such as psk31 and jt65, or can it only handle those at a reduced rate?


-Dave

N9PBJ
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[g0hww]

Hi Dave,

I ran my new KXPA100 with my KX3 for a lengthy rag-chew using Olivia
16/500 on 60m at 30W power, and after about 45 minutes of QSO time, I
hit the PA temp limit.

I added some USB powered fans (just taped together and sat on top of the
amp's heatsink  with rubber feet), and used a USB power switch to turn
them off and on as required.

I noted the following results.

Firstly a 5 minute transmission ...
60m, tx into dummy load, Olivia 16-500, 25W Fans On
Start temp 27C, Peak Temp 37C at 05:09.42, End temp 27C @ 09:47.98

Then a 10 minute transmission ...
60m, tx into dummy load, Olivia 16-500, 25W Fans On
Start temp 26C, Peak Temp 38C @ 10:02.57. End temp 25C @ 17:37.95

So, I don't have any info for you regarding running digimodes at 100W,
but for long transmissions or high duty cycle work, you may well need
extra cooling at 25-30W.

Cheers, 73

Darren, G0hWW


On 13/05/15 18:04, David Patino wrote:

> Didn't see the information on the website, is the KXAT100 capable of handling 100 watts with digital modes such as psk31 and jt65, or can it only handle those at a reduced rate?
>
>
> -Dave
>
> N9PBJ
> ______________________________________________________________
> 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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