[Elecraft] For those at Dayton (KAT500)

[Joe Subich, W4TV]

On 5/19/2012 4:53 PM, Pete Smith N4ZR wrote:
 > Just read the reviews of antenna tuners in QST, with
> careful attention to the amount of power absorbed in the tuner at
> some load impedance/reactance combinations, and imagine 600 watts
> being dissipated inside a 500-watt tuner.

Understand that most of the tuners evaluates in QST were "T" section
tuners.  The high pass "T" network can become pathological with some
values - particularly if the series capacitors have excessive Xc
(are too small).  The KAT-500 is an L-network tuner which generally
has much lower currents, thus less loss and less heating.

In spite of its modest height, the KAT-500 has some truly massive
inductors for a tuner rates at 600 Watts.  I'm not concerned that the
claim of 3:1 or somewhat higher for 1000 Watts is excessive and will
be seriously considering the KAT-500 as a "line flattener" if/when I
put the Quadras back on-line.

73,

    ... Joe, W4TV


On 5/19/2012 4:53 PM, Pete Smith N4ZR wrote:
> You bet, Vic.  Just read the reviews of antenna tuners in QST, with
> careful attention to the amount of power absorbed in the tuner at some
> load impedance/reactance combinations, and imagine 600 watts being
> dissipated inside a 500-watt tuner.
>
> 73, Pete N4ZR
> The World Contest Station Database, updated daily at www.conteststations.com
> The Reverse Beacon Network at http://reversebeacon.net, blog at reversebeacon.blogspot.com,
> spots at telnet.reversebeacon.net, port 7000 and
> arcluster.reversebeacon.net, port 7000
>
>
> On 5/19/2012 4:39 PM, Vic K2VCO wrote:
>> Oops, wrong again! I see that they make the claim that it will handle 1200-1500 watts on
>> the website. But I suspect you have to be very careful!
>>
>> On 5/19/2012 1:32 PM, Vic K2VCO wrote:
>>> I would expect that this would depend not only on the SWR, but on the nature of the
>>> impedance it sees. Unless someone from Elecraft told you this, I wouldn't risk running
>>> 1500 watts at 3:1 SWR (if Elecraft DID tell you this, then I'm ordering one)!
>>>
>>> On 5/19/2012 11:41 AM, N5GE wrote:
>>>> I will
>>>> handle 10:1 SWR at 500 - 600 watts and 1200 to 1500 watts at 3:1 SWR.
>>>
>>> --
>>> Vic, K2VCO
>>> Fresno CA
>>> http://www.qsl.net/k2vco/
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