[Elecraft] KXPA100, KXAT100 & Digital

[Darren Long]

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
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