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View Full Version : Resonance between PDR & mount (again!)

fast_ian
09-15-2008, 12:00 PM
Hi,

Back in the (good?) old days of the original forums, I posted that I was getting a horrible resonance between these two - Many questioned my sanity (!) and all said "never experienced that"..... I said I would follow up with a little video that demonstrated the effect. I've now created said video, and you can view it at the link below - First part is "before", second part "After". Same road, only change was the addition of the tape..... Comments?

I don't think I'm going insane :eek:

BTW - I just re-registered, but "you" won't allow me to start a new thread in the PDR forum :( Hence, I had to put it here - Please feel free to move.

Cheers,
Ian
PS - OK, Youtube is taking a *long* time to process the vid - I'll post the link in a follow up post as soon as I get it....
fast_ian
09-15-2008, 01:40 PM
The long awaited link:

http://www.youtube.com/watch?v=5KsZStaqzFc

It's only about 20 seconds, with the "before" version about 7 of that....
RandallNoll
09-22-2008, 09:54 AM
Ian,

Do you have the mount clamp installed with the yellow pin?

Thanks.
fast_ian
09-23-2008, 11:22 AM
Do you have the mount clamp installed with the yellow pin?

No Sir.

I do have that piece, but I've never bothered to install it [I'm not figuring on going upside down ;)]

Incidentally, I just got back from the annual Virginia City hillclimb and the PDR worked great most of the time [I'll start another thread with the details of the "issues" I had] but the insulating tape I stuck on the "catches" appears to have solved the resonating issue.

Cheers,
Ian
RandallNoll
09-23-2008, 11:49 AM
Ian,

A couple other things I'd check:

-Make sure the mount still has the four little pads that go on the base under the PDR.
-Make sure the "handles" on either end are on tight.
-Make sure the PDR "snaps" into place. If it doesn't snap tightly, you can bend the ends inward slightly to make it tighter.

Thanks!
fast_ian
09-23-2008, 11:56 AM
...Make sure the mount still has the four little pads that go on the base under the PDR.
It does.
-Make sure the "handles" on either end are on tight.
They are.
-Make sure the PDR "snaps" into place. If it doesn't snap tightly, you can bend the ends inward slightly to make it tighter.

It actually "snaps in" with a very satisfying "click" - Albeit less of a click since I added the tape. Oh well, no big deal. Thanks for the suggestions though.

Cheers,
Ian