3.5/7MHz dipole
http://www.qsl.net/v/va3rr//sw30/OH2ECwithTL.NEC
Coil Inductance Calculator
http://www.66pacific.com/calculators/coil-inductance-calculator.aspx
Schedule 40 PVC pipe is often used as Coil forms for wire trap antennas.
PVC Pipe Size Dimensions Chart
https://formufit.com/pages/pvc-pipe-size-dimensions-chart
L.B. Cebik, W4RNL (sk)
http://webclass.org/k5ijb/antennas/Trap-antennas.htm
An Improved Multiband Trap Dipole Antenna
You need this—traps with lower loss, higher Q,
increased power-handling capability and four-band coverage!
July 1996
by Al Buxton, W8NX
http://www.iw5edi.com/ham-radio/files/Trap-Dipole-Antenna.pdf
July 1992
http://www.lu2dt.org/archivos/40-80-160.pdf
Two New Multi-band Trap Dipoles
by Al Buxton, W8NX
August 1994, QST magazine
http://www.nrharc.org/Downloads/trapdipole80_40_17_12.pdf
Using Antenna Traps
by SotaBeams
http://www.sotabeams.co.uk/content/antenna-traps.pdf
http://blogs.yahoo.co.jp/hamken7388/31630218.html
http://blogs.yahoo.co.jp/hamken7388/31639683.html
http://www.lu2dt.org.ar/archivos/40-80-160.pdf
http://www.ve3sqb.com/hamaerials/rv3da/w3dzz006.pdf
http://www.clive.wankling.dsl.pipex.com/l2.html
https://www.nonstopsystems.com/radio/frank_radio_antenna_80m-dipole.htm#2x10m
G4CFY TRAP DIPOLE
7메가 트랩
파이프 지름 55mm, 길이 100mm.
18회 감기. 18uH
30pF 콘덴서
3.5메가 트랩
파이프 지름 55mm, 길이 165mm.
58회 감기
68uH
30pF 콘덴서
https://www.google.co.kr/search?q=W3DZZ+trap+dipole&num=20&newwindow=1&safe=off&hl=ko&site=webhp&tbm=isch&tbo=u&source=univ&sa=X&ved=0ahUKEwiw7dHP7rXUAhVJppQKHdL6DOIQsAQIJA&biw=1263&bih=899#imgrc=6ZbJxTsRPYInwM:&spf=1497186575147
http://www.sm0dtk.se/antennas.htm
http://www.mars.dti.ne.jp/~ohmae/ant/19357dp/19357dp.html
