[Elecraft] KAT500

[Klaus Koppendorfer]

i hat the same behavior on my KAT500 - could not tune what K3 and KX3 could tune...
i had a wrong capassitor on wrong place in the L C Network
Dick Divendorf sent me the cap infos and bingo... after build in right cap tuning of KAT500 was same as k3

73
klaus
oe6kyg
________________________________________
Von: elecraft-bounces at mailman.qth.net [elecraft-bounces at mailman.qth.net]" im Auftrag von "Wayne Burdick [n6kr at elecraft.com]
Gesendet: Donnerstag, 26. September 2013 23:58
An: Elecraft Reflector
Betreff: Re: [Elecraft] KAT500

Chuck wrote:

> The reason is that the KAT500 has more coarse component values... the values
> of capacitance for example are not as fine as on the K3. So the values on
> the K3 sometimes cannot be duplicated on the KAT500.

Hi Chuck,

I'm not sure where this idea came from, but I can assure you that the KAT500's capacitors (and inductors) have exactly the same component tolerances as those used in the KAT3.

What is different is the stray L and C. These always vary from one ATU design to the next because of the different PCB layouts and toroid core sizes.

Operationally, the most important difference is that the KAT3 will try to match some extremely high-SWR loads that the KAT500 will not, for safety reasons, given the potential for much higher RF voltage and current.

73,
Wayne
N6KR

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