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
http://observer.wunderwood.org/ (my blog)

> On Dec 12, 2020, at 5:04 PM, Mister Mike <[email protected]> wrote:
> 
> That is pretty much what I thought.  I will have to read the fine manual and 
> see how the automatic tuner works.  Picked up this K3 in a swap deal a while 
> back but I am still pretty much stuck ( happily) in the Collins KWM-2/S-Line 
> “Stone Age” so I need time and patience (lots) to figure how to use these 
> marvelous appliance radios. 
> 
> In any event I have a MAC-200 made by SGC who make pretty darn good tuners 
> which I can use but that is another box to take along if I do a road trop.
> 
> 73 to all....
> 
> Michael, W1RC
> 
>> On Dec 12, 2020, at 6:37 PM, [email protected] wrote:
> 
>> Hi Mike,
>> 
>> Its not wise to use the K3 antenna tuner to tune a random wire.
>> A truly random wire can easily produce VSWR greater than 10:1
>> which is likely to damage the K3 tuner when running at full
>> K3 output power.
>> 
>> Its much wiser to use an external tuner with a random wire
>> 
>> 73
>> Frank
>> W3LPL
>> 
>> 
>> 
>> -----Original Message-----
>> From: [email protected] <[email protected]> On 
>> Behalf Of Mister Mike
>> Sent: Saturday, December 12, 2020 9:42 AM
>> To: [email protected]
>> Subject: [Elecraft] Tuning Random-Length Wire Antenna with K3 Internal 
>> Tuner??
>> 
>> What is the best way to do this?  I am not familiar with automatic tuners.  
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