Julius Fazekas n2wn wrote:
I've not seen such an issue with two different KAT3s and significantly worse
mismatches.
How do you measure the degree of mismatch? A mismatch has two
dimensions, one of which (reactance) can be positive or negative, and
the other can be high or low.
--
David
) for...@david-woolley.me.uk
Subject: Re: [Elecraft] KAT3 L10 burned
To: Julius Fazekas n2wn phriend...@yahoo.com
Cc: elecraft@mailman.qth.net
Date: Thursday, January 7, 2010, 3:47 AM
Julius Fazekas n2wn wrote:
I've not seen such an issue with two different KAT3s
and significantly worse
mismatches
Yesterday I paid a visit to a firnd, Giancarlo I3GKK, who was very
worried about an accident happened 3 days ago.
Suddenly, during a brief tx period (10 seconds) at 100 W into a Windom
antenna, he saw smoke coming out from the top panel of his K3.
Since then no power out on all bands (measured
Good Morning Guilio:
This is not an uncommon failure. About six(6) months ago the fix was to
remove L10 and jumper the holes where L10 was installed with a suitable
piece of wire. I did that on mine and have had no problems with it since.
Be sure to email k3supp...@elecraft.com. There may be
I've not seen such an issue with two different KAT3s and significantly worse
mismatches.
What is the cause of the problem?
73,
Julius
This is not an uncommon failure.
-
Julius Fazekas
N2WN
Tennessee Contest Group
http://www.k4ro.net/tcg/index.html
Tennessee QSO Party
I'm not sure. When I spoke to Gary, he said there had been quite a few
instances of failure of this and/or the capacitor in this IF frequency trap.
73,
Ken K3IU
~~~
On 1/6/2010 8:37 AM, Julius Fazekas n2wn wrote:
I've not seen such an issue with
Giulio,
The load impedance was probably extremely low, and at full power on
this particular band, the power-handling capacity of the 8.2-MHz IF
trap was exceeded. It's possible that the trap was mistuned (too close
to 40 or 30 m). Note that L10's winding is adjusted at the factory and
I certainly hope that this modified algorithm will not prevent me
from using my inverted vee (fed with ladder line) on some bands.
My trap hasn't fried (a year and a half), and I'd rather replace
it repeatedly--or bypass it--than be forced off some bands.
I'm surprised that it's at the output
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