Hi Skipp,,,Brilliant just what I was looking for someonewho has the "T" shirt was involved with some of the first UK ham repeaters back in the later 70's now getting back into them,,,and yes have loads of test equipment etc,,,and hopfully the knowledge to use them,,,once again many thanks,,
Fraserskipp025 [EMAIL PROTECTED] wrote:
Hopefully you have the instruments to align the cavities. Clean any visible threaded shafts and mechanical parts with a small (wood handle type) Stainless Steel or Brass Brush.Use a combination of clean lint free rags and a non residue leaving lubricant to lightly free up the mechanical parts. Amsoil MP Synthetic Spray is a good choice for some places(and it's cheap to buy). Measure and record the relative shaft lengths and any available adjustments. I made up a drill chuck/clamp for the tune rod. After the above steps, I slowly run the tuning rods up and down almost the entire range of the plunger assembly. Using a Makita hand drill and many others with a very light torque release setting will ensure you don't damage the mechanics. Running the plunger cap up and down a few times will
help remove oxide buildup and pitting. High power RF, nearby lighting (and direct) can cause serious plunger/cap pitting, especially with/during small mechanincal vibrations. More so from inexperienced high power duplexer tuning.Those who use the rf power alignment duplexer tune method are advised to use very low power for the initial coarse adjustments. Put the duplexer adjustment back in range, adjust with your test equipment and see if the noise goes away. Be sure to check the coax jumper and connectors for proper assembly. A very light coat of Caig Labs ProGold G5 on a rag can be wipped over the connector ends. Plunger pitting is a very common noise source. Bad cases from lightning strikes and "Boob Tuning" may not be easily fixed ... in such cases you can only use the cavity at other frequencies where the adjustments don't place the damaged plunger/body mechanics at the same location.
Been there, done that, coffee mug and tee shirt. cheers,skipp "fraser3914" <[EMAIL PROTECTED]>wrote: Hello all,,,I need to strip down and service a set of four Wacom 145mhz filters for our local 2m box has anyone any advice before I start after 15 years use the adjusters have become noisy etc, Rgds Fraser G8FEZYahoo! 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/
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 the Yahoo! Terms of Service.
