I used to be in the clean everything back to new... camp. About three years ago I was built some really High-Q tank circuits for NMR Probe Research. The test equipment I have will clearly show a relative circuit operational Q.
After a lot of construction and testing I could see that even mild chemical cleaning a working tank circuit and a connection re-solder of the wrong type can and would trash the circuit Q values. After much testing I could not see a change in circuit Q with mild surface oxidation built up over time but anyone changing the circuit around and cleaning surfaces would often spoil the tank (ruin the circuit). In the case of duplexer and cavity bottle cleaning... unless there is pitting on the plunger... I (most of the time) depend on just the polish action of the internal finger stock run through its range (up and down) a few times to make sure things/contacts are working as expected. Depending on what threaded shaft lubricant you like or trust a very mild (prudent) amount on the outside moving mechanical parts might be helpful if you don't overdo it. cheers, skipp > "georgiaskywarn" <[EMAIL PROTECTED]> wrote: > > Wow that stuff is expensive...when I did a search on it. What were > you paying for that. > > Skipp...I know what you are saying on cleaning of them. I guess I am > looking at trying to make the things as clean as possible. You would > think that a "tuned circuit" would have issues with extra "stuff" > collecting inside. However...I bow to the experts on here. That is > why I ask the questions ;-) > Thanks guys...keep you posted on the progress... > Robert > > > --- In Repeater-Builder@yahoogroups.com, "crackedofn0de" > <cracked@> wrote: > > > > > > --- In Repeater-Builder@yahoogroups.com, "georgiaskywarn" <kd4ydc@> > > wrote: > > > > > > Had an experience with using "TarnX" in cleaning some Moto cans. > Had > > a > > > friend of mine that used this with great success. I used it...had > > > issues. The difference is he used "running water" when I used > a "pan > > > of water". Didn't clean off very well...so corrosion came on even > > > faster because the "Murratic Acid" (sp?) didn't clean off very > well. > > > > > > Got to thinking (because I have to do this again), why not just > > > use "Murratic Acid" which is used in pool cleaning products. A > gallon > > > of this...deluted...is MUCH cheaper than the "smallish" bottles > > > of "TarnX". > > > > > > Anybody use this before??? > > > 73 > > > Robert > > > > Robert, > > > > Try rinsing metal polish away with plain water, then blast > the "clean" > > surface with contact cleaner and watch the black grime sheet off. > > > > I've found that not all contact cleaners are created equal. I've > been > > using WAXIE #410510 which has a high-velocity/high-volume spray. > > > > James K7ICU > > >
