Paul, I agree with Ian: > If the plunger is now free of the tuning knob then perhaps you could slip > some > heatshrink tubing into the gap and fix it with a heatgun..
This may be your easiest fix. The plunger I was referring to was from a Wacom 641 duplexer. I'm sorry I don't have any pictures of the innards of that can. > So what now? I think I could solder the rod to the top of the > plunger without dislodging the whole end plate. Is that a bad idea? I can't help but wonder if it was originally soldered at the factory or not. I know it's probably a fair size job, but taking another "good" can apart would tell if they were indeed soldered or not. It's my feeling that they might have been, but I'm not sure why the mfg. felt that soldering them was necessary. You can look at it this way: If you take another one apart and find it to not be soldered, it's just a problem waiting to happen. Then they ALL need 'fixed' If you can't slide a piece of heatshrink between the rod and the plunger, Unsolder the other end, slide it out and enlarge the hole a bit. I would not follow Ian's recommendation and drill holes around the rod and enlarge the hole that way. I feel that is the hard way to make the hole bigger and will probably do more damage than necessary. Scott Scott Zimmerman Amateur Radio Call N3XCC 612 Barnett Rd Boswell, PA 15531 ----- Original Message ----- From: "Paul N1BUG" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, October 24, 2007 2:36 PM Subject: Re: [Repeater-Builder] DB4062 woes... > Progress! > > Scott, or anyone... > > I got one of the knobs off. Removing them is not such a big deal as > I thought. It turns out the brass insert in the knobs is threaded. > They are screwed onto the rods AND soldered. Sheesh! > > The hole in the top metal end plate of the plunger is indeed just a > little bigger than the rod... not much more than .010". Photo: > > http://www.n1bug.com/cavity2.jpg > > If there originally was an insulated insert I suspect it was a > special item for this application (or at least not hardware store > variety). But if there wasn't one then I'm left with the original > mystery of why it didn't have this noise problem until fairly recently. > > So what now? I think I could solder the rod to the top of the > plunger without dislodging the whole end plate. Is that a bad idea? > Better ideas? Alternatively, I think I could just squeeze some .005" > PTFE sheet in that gap, but there isn't enough clearance to allow > overlapping the ends at all. Also it might not stay put or hold up > well with time and vibration. > > I still can see no other possible source of the noise/desense in > this cavity. > > Paul N1BUG > > > > > > > Yahoo! Groups Links > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.503 / Virus Database: 269.15.9/1090 - Release Date: > 10/24/2007 8:48 AM > >
