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Ribbon problem, (Read 2292 times)
IMP
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Ribbon problem,
07/12/10 at 20:07:46
 
New Err's installed and been done some listening test and straight off I knew things were not quite right. I wasn't sure what sort of sound stage to expect but I did expect the vocals to take centre stage but they just didn't. Getting close up it was obvious the ribbon tweeter is the culprit. One gives a nice clear sound the other all thin and screechy. The connections look fine to me but I'm not experienced enough to look at the ribbon itself to see if al is ok.

Any Suggestions as to what I should do or check?

Thanks

Ian
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Lon
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Re: Ribbon problem,
Reply #1 - 07/12/10 at 23:39:50
 
Are both resistors the same value?  That could be a culprit.

I'd redo all the connections again if possible. . . I wish I had a quarter for every time I thought the connections were fine in my setup and I had something loose or wrong. . . .
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dank
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Re: Ribbon problem,
Reply #2 - 07/12/10 at 23:57:11
 
If those speakers have the resistor and capacitor mounted in the jack plate where you can get to them, you could swap R and C with the other speaker to eliminate or prove if R or C or the connection is the problem.

Dan
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ZYGI
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Re: Ribbon problem,
Reply #3 - 07/13/10 at 02:43:46
 
Ian,

 Check what both Lon and Dan suggested first, sounds like a loose binding post, tighten them all up.

If that doesn't work.... you can run a straight piece of wire from the main binding posts to the back of the tweeter. Make darn sure the volume is as low as you can, with very light acoustical music, and no bass content. Only do this for just a few seconds to see if the tweeter clears up.

BobZ
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IMP
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Re: Ribbon problem,
Reply #4 - 07/21/10 at 20:02:10
 
Not sure which binding post but after giving them all a bit of a turn everything seems fine.

thanks for the help.
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Lon
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Re: Ribbon problem,
Reply #5 - 07/21/10 at 20:37:30
 
Great!

I had a loose connection on my IT Radials and it sounded werid, distorted, and I was surprised that it was a loose connection.  Glad yours was as easy to solve.
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ZYGI
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Re: Ribbon problem,
Reply #6 - 07/21/10 at 22:38:49
 
That is good news Wink just what I suspected....here is what happens and a good reason to check connections for the first month or so, it seems after that they never come loose. If you do change a cap, or resistor check again for awhile.

Here's what happens....the edges are pretty sharp, so they make good contact with the wire, the closer you get to the bottom of the wire bore the more chance you have of getting it tight before it reaches the very bottom of the bore, so you think its tight, then it moves just a bit and its loose again. This is all because the bores are large and the leads are so small. Once it finds the true bottom of the bores arc it stays forever.
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