Seriously?? Why do you think that Elecraft's tuners (like just about
every other one) have max power ratings that differ depending upon the
SWR? For example, for the KAT500 has a max power rating of 1000 watts
into a 3:1 SWR but only a 600 watt rating into a 10:1 SWR??? It can
match both SWRs, but not handle the same power at both.
Did you bother to check out TLW like I suggested?
Dave AB7E
On 12/12/2020 8:59 PM, Walter Underwood wrote:
Of course there are high voltages or currents in some tuning solutions. Why do
people think the Elecraft ATU would not be designed to handle those?
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
On Dec 12, 2020, at 7:36 PM, David Gilbert <[email protected]> wrote:
A matched conditon does NOT prevent the components of the tuner from seeing high voltages
and/or high currents. Check out TLW ... the transmission line application that comes
free with the ARRL Antenna Book. Pick a load that gives a high SWR and then click on the
"Tuner" button for the application to draw one of four different tuner
configurations for you. The app will tell you what the voltages across each component
are, and also the power loss (i.e., heating effects) in each one.
73,
Dave AB7E
On 12/12/2020 8:18 PM, Walter Underwood wrote:
Tuning happens at low power, so transients are small. After it is matched, why
would the K3 ATU not be rated for full power over the full SWR range?
Other components might fail, of course. Amphenol UHF connectors are only rated
for 500 V.
wunder
K6WRU
Walter Underwood
CM87wj
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