[Elecraft] Help, I think I've killed my K1

Wed Feb 19 20:47:00 2003

If this is the case then those who have the K2/100 should not be putting
their rig on top of the matching tuner.  Seems to me that no one has
complained of any problems with that configuration.  Also the matching tuner
(FC-20)  for the new Yaesu FT-897 attaches to the side of the rig.  What
about internal antenna tuners?

I would agree that this would be a problem at power levels in the KW range.

----- Original Message -----
From: "Stuart Rohre" <[email protected]>
To: "John Webster" <[email protected]>; <[email protected]>
Sent: Wednesday, February 19, 2003 7:35 PM
Subject: Re: [Elecraft] Help, I think I've killed my K1

> Although it seems you are correct you popped something in the K1, I can
only
> urge everyone to learn from this the following:
>
> Do not place rigs atop each other if  they have aluminum or plastic cases
> and antenna tuners, as there may be considerable magnetic field coupling
of
> the tuned circuits leading to overload of the standby rig.
>
> Do not even place an ATU atop a rig, for the same reason if the ATU has
> solenoid rather than toroid coils.  Some field even escapes toroid coils
so
> having space between rig tuned circuits and Transmatch circuits is
> desirable.
>
> The above problems of magnetic coupling can be lessened by Mu Metal
magnetic
> shielding of Tuned networks but that is very expensive metal.
>
> The most likely thing to go in a receiver from overload are the input
> circuits including any fine wire coils, and the mixer or RF amplifier
stage.
> IF the circuit did include protective diodes, there is a possibility of
> shorted diode from an overload.
>
> Grounding the unused rig inputs of spare rig is done by some antenna
> selector switches, but I have even measured some considerable signal
across
> those on the unused port.
> 72, Stuart K5KVH
>
>
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