yes... Weak Signal, not low power. The EME boys use 1 KW.
73s and thanks,
Dave
NK7Z
https://www.nk7z.net
On 07/17/2018 07:15 AM, turnbull wrote:
I thought FT8 was a low power mode. Am I wrong? I am not referring to Fox
Hound mode.
73 DOUG EI2CN
Sent from my Samsung Galaxy smartphone.
-------- Original message --------From: Michael Blake via Elecraft <elecraft@mailman.qth.net>
Date: 17/07/2018 14:12 (GMT+00:00) To: Nr4c <n...@widomaker.com> Cc: Elecraft Reflector
<elecraft@mailman.qth.net>, ANDY DURBIN <a.dur...@msn.com> Subject: Re: [Elecraft] KPA500
thermal clicks
While possibly my imagination, after a few months of use I loosened all of the
Z bracket to heatsink screws and side panel to heatsink screws and then
retightened all of them plus the top cover to Z bracket screws. That seemed to
reduce the clicking.
Very 73 - Mike - K9JRI
On Jul 17, 2018, at 9:05 AM, Nr4c <n...@widomaker.com> wrote:
“Clicks” caused by the “Z” bracket are well documented and normal. Personally,
I don’t find this “intolerable” or even slightly annoying. My wall clock
“ticks” every second.
Sent from my iPhone
...nr4c. bill
On Jul 17, 2018, at 7:56 AM, ANDY DURBIN <a.dur...@msn.com> wrote:
The clicking of my KPA500 is almost intolerable and I'd like to know if what
I'm experiencing is typical.
In an FT8 TX/RX cycle with output power 126 W my KPA500 clicks 7-8 times
during 15 second transmit and 7-8 times during 15 second receive. In these
TX/RX cycles my logger shows the finals temperature swings between 57 deg C and
63 deg C. During this test the KPA500 was seeing an SWR of 1.02:1 and
calculated PA dissipation was 307 W.
I don't think this temperature swing is likely to cause the heat sink to expand
and contract significantly. The thermal mass of the heat sink is quite large
and the heating and cooling periods are short. The first click happens
almost as soon as the KPA500 is keyed.
I think it is possible that the clicks are caused by expansion and contraction
of the finals at their mounting points. Is that likely and, if so, why would
it be considered normal?
73,
Andy k3wyc
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@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 n...@widomaker.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@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 k9...@mac.com
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@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 turnb...@net1.ie
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@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 d...@nk7z.net
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@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 arch...@mail-archive.com
