Nov 15, 2007 #1 E elec350 Full Member level 4 Joined Dec 17, 2006 Messages 199 Helped 1 Reputation 2 Reaction score 0 Trophy points 1,296 Location Iran Activity points 2,548 hi what is helical filter? what is frequency band of it? can it be used in vhf/uhf?
Nov 15, 2007 #2 boy Advanced Member level 1 Joined Sep 30, 2002 Messages 481 Helped 98 Reputation 196 Reaction score 58 Trophy points 1,308 Location Thailand Activity points 3,963 helical filter [hlp] yes it can be used in VHF/UHF. you may try http://www.temwell.com.tw/main.htm to get the idea what frequency range for helical filter.
helical filter [hlp] yes it can be used in VHF/UHF. you may try http://www.temwell.com.tw/main.htm to get the idea what frequency range for helical filter.