phpws_leftup Menu phpws_rightup
phpws_leftmiddle phpws_rightmiddle
indent  Home
indent  Top Band Group 1.972
indent  Radio1933 Website
indent  14.240 Group
indent  About Me and Radio
indent  My Guest book
indent  Aerial Designs
  indent  T Aerials
  indent  The JoyStick Aerials
  indent  M0VEY 160m DX Mobile Aerial
  indent  Un-UN how to build
  indent  Matching Coil
  indent  Wire Aerials Calculator
  indent  1/4 wave Matching Stubs
  indent  160m Shunt Feeding
  indent  Radio Waves ?
  indent  SWG/AWG Wire Gauge Chart
  indent  Convert from feet to meters
  indent  Convert meters to feet
  indent  Thread Data Chart
  indent  160m Helical Design
  indent  Metric Thread - fine pitch
indent  Understanding Aerials
indent  My Online Logbook
indent  Site Search
indent  Tower Project
indent  Latest lightning data UK
indent  Photos of Ham Friends
indent  Aerials Photos
indent  Photo Albums
indent  UK Band Plan
indent  Graphical Resistance Calculator.
indent  Top Stats
indent  Site Map
indent  EI7JM 160m Tower install
indent  Projects
indent  DX Tools
indent  Latest Radio News
indent  news feed
phpws_leftdown phpws_space phpws_rightdown
phpws_leftup Log In phpws_rightup
phpws_leftmiddle phpws_rightmiddle
Username

Password

Remember Me

phpws_leftdown phpws_space phpws_rightdown
phpws_leftup Search Web Pages phpws_rightup
phpws_leftmiddle phpws_rightmiddle



phpws_leftdown phpws_space phpws_rightdown
balken

phpws_leftup How to Build a UN-UN phpws_rightup
phpws_leftmiddle phpws_rightmiddle

How to Build a UN-UN

To Build a UN-UN you need the following Items

Amidon Ferrite Toroid model T 200-2 ( 0-30 MHz )

Amidon Ferrite Toroid model T 200-6 ( up to 50 MHz )

about 3 metres of insulated copper wire 0,75mm

Direction: Fold the 3 metres of copper insulated wire in two. Mark the wires' end so to recognize them when the windings is done.

Wind 13 to 19 turns of the bifilar wire ( more turns better response to lower band ).

Connects the wire to the box terminal and the UHF connector ( SO 239 ) see the pics. READY

un-un

unun1

4:1
Some think that the UN-UN is just a 4:1 Balun but look at the drawings
un-un
un-un made

-
10/08/2008 12:17 AM by g7lrradmin
Updated on 10/10/2008 09:54 PM by g7lrradmin 		 Printable Version
phpws_leftdown phpws_space phpws_rightdown
phpws_leftmiddle phpws_rightmiddle

Latest Amateur Radio News from around the world

HAMNET severs all links with IRESC
Waters and Stanton's Mark Francis G0GBY visits LEFARS this coming Friday
YJ0VK DXpedition wrap-up
Vuvuzela Morse Code
NZ aftershock forces radio station’s evacuation
IOTA news from the Deutscher Amateur Radio Club
ZNS 1540 signal restoration likely to take 30 days
New D-STAR repeater now in place in ARRL laboratory

View Details
phpws_leftdown phpws_space phpws_rightdown
phpws_leftup Random Photo phpws_rightup
phpws_leftmiddle phpws_rightmiddle
phpws_leftdown phpws_space phpws_rightdown