My ham radio adventure...

Friday, May 2, 2008

SLIM JIM ANTENNA for 2mtr @ 146.00MHz

part:
used old tv antenna,
my wife broomstick

tools:
ribet, drill, measuring tape, insulator tape.
SWR tested using Diamond SX27P : ICOM V8 - okey, but not checked with SWR meter
ICOM 2200H: Low (5w) - ard 1.2 , power 5w Mid Low (10w) - between 1.2 - 1.5, power 9-11 Mid (25w) - between 1.2 - 1.5, power 24-26 High (65w) - ard 1.5, power can't read needle full.

detail to refer to pix album...

New Spider Antenna

5 x 19.25" copper wire/welding - RM3/btg 42" (total RM9.00)
1 x rig connector (mcm belakang rig tu) - RM6.00
4 x small screw + nut - RM2.00
4 x cable connector - RM1.00

(1) Cut 5 pieces of copper into 19.25" each
(2) solder 4 pcs of cable connector to four copper
(3) File(kikis) 1 copper end to fit into the rig connector
(4) Solder the copper to the rig connector as hot
(5) Assemble the 4 copper to the body of rig connector as groundplane
(6) Install with antenna cable to the rig. Hot pointing 90deg to sky, 4 groundplane pointing 45deg to ground.
(7) Check with SWR meter, reading will be between 1.0 - 1.5 (for 145.700mhz)

Happy Communicating!!! A special thanks to 9W2MDY dan 9W2LKB yang memberi tunjuk ajar...

2M Collinear 8dB Antenna

Bahan:
20 meter RG58 + connectors - RM80
1 x 6mtr Pole (Aluminium or else) - use my old telescopic fishing rod - free!
5 x plastic plate - 5" x 2.5" - free! can use any thing even yr old tupperware
2 x aluminum tube - 19.25" - use my old tv antenna - free!
3 x copper welding strip - 38.75" - RM2.20/pc
4 x electric wire cable - 38.75" - free!
black electrical tape cable tie (140mmx3.6mm)
1 x choke balun - DIY - free!! (need 1x 1" x4" White Plastic pipe)
overall cost: RM86.60

Tools:
tube cutter or gergaji besi
wire cutter
solder iron + timah
steel screws plus screwdriver
files (kikir)
sandpaper