What make and model of duplexers do you have. Dont remember seeing that mentioned. The tuning rods and loops would be the main idem to plate. They are the main current carrlying surfaces. I have see some Sinclair cavities where those part are silver plated and the main part of the cavity is anodized.
Plating is for a two fold reason. Oxidation and surface conductivitly. Left bare copper and brass will oxidize on the surface. Oxidized surfaces have much higher loss Silve will also ozidize but silver oxide is less losy than clean brass or copper. Add a little moisture in the mix and things get worse faster---the green meanies Just doing the loops and rods is well worth the effort if not just for long term stability. Here againg what models are you looking at??? I know I have some books with articles on plating that I can copy and email to you if you would like. Makes for some interesting reading. I think I also have the ARRL book with the home made 2 meter duplexers which talk about plating.. Let me know Dale --- In [email protected], woody Carner <roadma...@...> wrote: > > > > > > > ________________________________ > From: Dave <dave_g7...@...> > To: [email protected] > Sent: Wed, July 14, 2010 1:04:15 PM > Subject: [Repeater-Builder] Re: Silver Plating - Cheap & Easy > > Â > In this design of cavity casing I wouldn't be able to apply the powder to > anything other than the loops and the tuning rods which would only constitute > about 20% of the internals. The only way an electro plating company would be > able to do it would be to fill it right up with fluid. > > I'm going to leave 'as is' > > Cheers Dave UZN > > --- In [email protected], "dwmcgraw@" <dwmcgraw@> wrote: > > > > I just checked and the Cool Amp Power and Lube is still avaiable. My stock > > is > >the powder. I dont know what the Lube is like. Maybe its is in the form of a > >cream. > > > > Dale\\ > > http://www.cool-amp.com/ > > > > --- In [email protected], "dwmcgraw@" <dwmcgraw@> wrote: > > > > > > > > > I read a few of the posts about silver plating and can tell there are not > >many of the old build it your self 2/432 high power amp builders left > >around. I > >was used to plate cavities and tank circuits. > > > > > > The is a silver plating power that one can buy and it is called Cool AMP. > > > Was > >originally designed for plating contacts on high current electrical > >connectors > >to reduce heating by cutting down contact resistance. Worked great. Easy to > >use. > >It is a slightly gritty powder that is applied with a damp cloth. Use it > >like > >spit polishing your old military black shoes. > > > > > > > > Works good for small and medium size areas. I have used it to touch up > > > the > >main pass cavity tuning rods. coupling loops and also plating circuit for > >general coating and maintain solderability. About do years ago I bought two > >jars > >at 35 a jar. Jard are bout threee inches tall and two inches wide. Goes a > >long > >way if you use it right. Great stuff to fool the Cops to make them thing you > >have some drugs-- Hi. > > > > > > The company name is Cool Amp Conducto lub Company in Portland . Dont know > > > if > >they are still in business but sure is a good alternative to messing with a > >lot > >of liquid chemicals. The oder VJF/Uhs Handbooks mentioned it for plating > >Plate > >circuits for homemade amps. It will oxidize but still is a good conductor in > >that state/ > > > > > > Good luck, Dale k0jxi > > > --- In [email protected], Oz-in-DFW <lists@> wrote: > > > > > > > > > > > > > > > > On 7/14/2010 6:37 AM, N1BUG wrote: > > > > > JG wrote: > > > > > > > > > >> Good fishing !!, or is your memory that good:) > > > > >> > > > > >> I poked "Ham Radio magazine" into Google > > > > >> and found a few articles on silver plating > > > > >> in this list: > > > > >> http://webhome.idirect.com/~griffith/hr/hrind05.htm > > > > >> > > > > > > > > > > "Safe, Sensible Silverplating" ... that rings a bell! That is the > > > > > one I was thinking of. > > > > > > > > > > Feb 1985. Hmm. My guess of "mid 1980s" wasn't too far off the mark. > > > > > Now if only I knew what I did yesterday. :-) > > > > > > > > > > > > > > >> Now, here's the Million Dollar question.. > > > > >> where are these articles archived ?? > > > > >> > > > > > Nowhere that I know of. > > > > > > > > > ARRL sells the complete archive on CD. $60 > > > > > > > > http://www.arrl.org/shop/Ham-Radio-CD-ROM-1984-1990/ > > > > > > > > -- > > > > mailto:oz@ Oz > > > > POB 93167 Southlake, TX 76092 (Near DFW Airport) > > > > > > > > > >
