Hi Thanks for info. Yes I appreciate what you say. I have used coax as filters on VHF PMR ie 160Mhz and they worked fine. Will give it a go
73 Steve ----- Original Message ----- From: "Coy Hilton" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Saturday, June 11, 2005 8:58 PM Subject: [Repeater-Builder] Re: coax notch > It's easy, a ELECTRICAL quarter wave length open stub or Half wave > shorted stub will give you a DEEP notch on the order of 25 to 32 db. > The electrical length is the mechanical length multiplied by the prop > factor. It's easiest done by cutting a bit long and pruning to length > using test gear to get the notch where you want it. > Good luck! > 73 > AC0Y > > > > --- In [email protected], "steve" <[EMAIL PROTECTED]> > wrote: > > Hi > > is there a fr,ee computer prog to work ot the lenghts of coax to > make notch filters ?. Iam starting to put together a 6mtr repeater > here in the UK, and need to play with coax to make a duplexer, can't > afford the prices of a ready made one. > > I don't fancy using heliax, OK it works, but looks a mess and takes > up so much space. So any ideas appreciated. > > > > > > 73 > > > > > > Steve > > > > > > > > > Yahoo! Groups Links > > > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > Version: 7.0.323 / Virus Database: 267.6.8 - Release Date: 11/06/05 > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
