Rigging "Hum"

[n624ma]

In light (<10kt) wind on the mooring the stbd rigging hums. It is a medium to high pitch sound and if you lightly place a fingertip on the rod you can feel it.

I'm new to the C34 family, but not sailboats.

Rigging tensioned using a Loos gauge for the lowers and 3mm stretch at 2m for the uppers.
No hum on the port side.
Seems to be coming from the stbd upper, but you can feel it on all three.
I checked the archives and didn't find an answer.
It is not mast pumping.

Any thoughts?

[Ron Hill]

n62 : I assume that you have the identical tension on the port as on the starboard? 

[n624ma]

Ron,
All the tensions are as close to equal as I can get them.

[crieders]

I'll bet its an electrical bleed; in other words, I short. Does it carry a current. I have had the same thing in the lifelines, when I first bought the boat and after about 6 hrs of crawling around with a meter, I found the short. You said this happens only in a breeze however; mine was not affected by the wind at all. So who really knows.....

[Footloose]

Cliff,

Where did you find the short?  I also have current in my life lines.  Seems to be when the nav lights are on.  I have not had time to look for it yet, but you could save me a lot of time.

[Jim Hardesty]

Here are total guesses.   The starbord spreader has a flag halyard and thats starting the vibrations.  Or the halyard is gone but the hardware is still there vibrating.  Are the spreaders set at the same angle?  What about where the spreaders pin to the mast and the wire guide?  Spreader boot and or rigging tape?
Jim

[Stu Jackson]

Cliff,

Where did you find the short?  I also have current in my life lines.  Seems to be when the nav lights are on.  I have not had time to look for it yet, but you could save me a lot of time.

Most likely the forward port base of the pulpit, where the wiring comes into the pulpit.