[Elecraft] K3 KAT3 High SWR Issue Solved

[Keith Trinity WE6R]

Here is the history on the 8.215 trap on the KAT3 KANT3 boards.
Overview; There is an 8.215 trap on the RF board, the trap on the 
KAT/KANT3 boards was an additional trap that was later found to be way 
overkill.
On the KAT3 ATU, it is on the antenna side of the tuner, so it is 
subject to high SWR and can heat and burn.

On the KANT3 you cannot cannot run with high SWR or the radio will back 
off, so not a problem on these boards.

Early ATUs had a small coil L10 and single pink/brown capacitor C10.
The cap can fail internally invisibly or catastrophically!
The coil can get burnt.

We went to a beefier coil and 2 small blue capacitors around 2010.
It is rare, but these beefier components can also fail.

_**In repairs,_ if it has the older weak components, we just pull the 
coil and insert jumper (no need to pull the capacitor as it is 
effectively now shorted).
If it has the newer beefier components, we leave it alone unless burnt.

The new KAT3"A" does not even have this trap, it came out with the K3"S".
Keith WE6R