Yeah, I missed that...;-)
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Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389
On 7/8/2016 3:37 PM, Bill W4ZV wrote:
> Clay Autery wrote
>> NOW, TRANSMIT on SSB at 100W on the PA
> Just curious how you get 100W out of the KX3? ;-)
>
> 73, Bill W4ZV
Clay Autery wrote
> NOW, TRANSMIT on SSB at 100W on the PA
Just curious how you get 100W out of the KX3? ;-)
73, Bill W4ZV
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Sent from the Elecraft
Your analysis is right on target, Clay -- dissipation must certainly be
considered. Note, however, that when he Bill suggested series diodes, he
was specifically addressing the KX3, not a 100W K3. As to the use of
diodes to reduce the voltage -- I'd look first at the possibility of
adjusting
That's one way to go, but note... that while this may work great on RX,
heat dissipation MIGHT be an issue on TX.
I'm building a fan controller to control 4 x 120mm fans (1.6A per max)
on EITHER the 12V or 13.8V power supplies at our repeater site...
I tried using 10A10 diodes to drop the 13.8
>Damage due to using anything over 15 V would void the warranty, since that's
the specified maximum.
Add in series a couple of silicon diodes (~0.7V drop each) of sufficient
current rating in the positive lead. 16V - 1.4V = 14.6V.
73, Bill W4ZV
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Damage due to using anything over 15 V would void the warranty, since that's
the specified maximum.
That said, we always over-design wherever possible, so it'll probably be OK.
For example, we shoot for 25 V or higher capacitor ratings for all capacitors
exposed to the supply.
73,
Wayne
N6KR
I have a switching battery supply with 12 and 16 volt settings. Is it safe
to use the 16 volt setting with the KX3? I did so briefly without obvious
problem.
Bob
K7VO
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