Topband: Homebrew Hairpin

[Hal Kennedy]

I have matched quite a few Tee top verticals - and do it as follows...

Put an antenna analyzer at the feedpoint and measure what you have at the
QRG you want - probably 1.830?


Put the numbers into the TLW program and let it design an L network for you.

Wind the L and use transmit quality surplus caps for the C.  I can supply a
coil winding Excel spreadsheet off the list to help get the coil wound.  For
coil forms, in the US, Target stores sell drinking cups that are about 3" in
diameter and are made of polycarbonate, which is an excellent choice for an
HF coilform.  They are about $1.  Buy one the color you like, cut the bottom
off and wind the coil on that.

Not much to it - always seems to work the first try.  The only occasional
issue is a strong BCB station may confuse the antenna analyzer. 

73,
Hal N4GG