Amateur Radio Today - Free and Open Source Software

MFJ halfwave vertical Antenna
6 bands: 40, 20, 15, 10, 6, 2 Meters . . . No radials or ground needed!
Operate 40 ,20. 15, 10.6.2 Meters with this ant~nna wilh.a highly emdelll air-wound c!'ooke balun.
MFJ- 1796 ground independent halfwa ve vertical TIns deoou ~~h....s .ancntuatc.s RF ~ .the outside of the
antenna -- no radials or ground ever needed !
coax and rturunuzes fecdlire radiation lhat waste useful
It's only 12 feel high and has a tiny 24 inch
power.
footprint! Y ou can moun! it anywhere from ground t
EaS)' to Adjust
level to the top of a tower -- on apartments.
lr's ....cry easy to optimize the MFJ-17% for your
condos. small lots. even on a motorbome. You can :f
lake it anywhere - vacations. fi eld day . . '
Dx-pcdiuon. camping. nearly anywh ere you go.
Frequency selection is fully automatic .- there are
no moving parts. nothing to adjust -- all you do is
transmit. It handles up to 1500 watts PEP. You'll
work your share of DX because its low angle of
radiation rea lly reachs out and b ring s in DX.
During a contest. you' ll love being able to
quickly work one station a fter another from all
directions because o f its ornni directiona l pattern.
It's so easy to put together that you can have it
on the air in an afternoon.
How does MFJ achieve maximum efftclencv
in such a compact multiband antenna? .
The key is end loading -- the most efficient form
of loading known. The ell/ire length: o f the ame nna
is always rad iating power. There are no lossy traps
to reduce effective length .
End loading provides multihanding and full electrical
half wavelength on each HF band. An optimum combination
of capccinve hat and inductive end loading deli vers
a dose 50 ohm match withoct a lossy impedance
matching network.
EffICient high-Q hlding coils are wound on low kJS..