[Elecraft] KX-1, Picnic Table Portable and TVI

[Ron D'Eau Claire]

Broadband TV amplifiers are darn near impossible to deal with. Your rig may
be clean as a whistle, but when the RF from your signal down in the HF range
hits that amplifier it overloads the first stage producing garbage across
the spectrum, including all the TV channels up through UHF. Even TV's not
connected to it may get TVI from the junk re-radiated by the amplifier
through the antenna. 

The right solution is a high-pass filter at the broadband amplifier input to
block the HF signal from your rig, and perhaps proper shielding if it isn't
already. That's not a practical solution in cases like yours in the RV park.

The only other solution is to reduce the amount of RF it picks up. You do
that by moving your transmit antenna away from the TV antenna and/or
reducing power. 

Ron AC7AC

-----Original Message-----
Is anyone experiencing TVI.  Recently I went camping in an
RV park where most of the TV reception was via the Winguard amplified TV
antenna, not Satellite.  This is a broadband receiver amp for TVs and is
built into the antenna.

When operating 40 and 30 meters CW from a nearby picnic
table into a Buddipole with close to 1:1 SWR I could see my
own TV inside the motor home 15 feet away lightly flashing
as I keyed.

The problem was somewhat less with internal batteries indicating 1.5 watts
but the dim flash was still there.

Park folks not happy, me not happy, what is your
experience??  Bill K6ACJ