Eric, Thanks for the tips.
Steve WA6ZFT > > From: Eric Lemmon <[EMAIL PROTECTED]> > Date: 2005/02/01 Tue PM 08:31:43 EST > To: [email protected] > Subject: Re: [Repeater-Builder] UHF Mitrek LO leakage mitigation > > > Steve, > > The single most important step in mitigating fugitive LO emissions is > ensuring that all shields are in place and properly seated, and all > screws are in place and tight. Anyone who has had LO leakage with > Micors knows that you can't leave out any shields, and the same > precaution applies to Mitreks and almost any other brand or model. > > If the shields are in place and the covers are tightly fitted, then > adding ferrite filter cores on the power and control leads may help. > The fact that your Mitrek has been modified suggests that the mods may > be at the heart of the problem. I'd look first at any DC control leads > that enter or are near the LO, and apply ferrite chokes or feedthrough > capacitor filters as appropriate. > > 73, Eric Lemmon WB6FLY > > [EMAIL PROTECTED] wrote: > > > > Hi, > > > > I have a modified UHF mitrek mobile in repeater service which is emitting a > > strong signal at 1/3 of the LO mixer injection frequency. Before I travel > > to the site which is over 300 miles away, I'd like to make a list of things > > to check when I get there. I know the preselector can be problematic, as > > well as the channel elements themselves. > > > > What have the lest members tried with success to mitigate the LO radiation > > from Mitrek mobiles? > > > > I know that this radio should have have the preselector cold-end helical > > coils resoldered. A Cactus technical article mentions this should be done > > with silver solder. > > Does anyone know why silver solder is preferred? > > > > Steve > > WA6ZFT > > > > > > > > > > Yahoo! Groups Links > > > > > > > > > > > > > > > Yahoo! Groups Links > > > > > > > > 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/
