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Old 15th July 2013, 04:07 AM   #1
srinath is offline srinath  United States
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Default Carver amazing ribbon repair

I got carver amazings today and I have one tweeter that seems to be out.

The good one reads about 7.7 ohm dc resistance without a signal fed to them, the bad ones read 8.7 or so.
Now the bad one has about 3.6 ohm resistance in the tweeter.
There is an ac voltage coming to that tweeter from the crossover when its in play - fluctuating between 2 and 5-6 v. I think the crossover works fine.

However there is no sound from the tweeter.

That speaker also causes the amp to shut off when its being played. The good one that makes sound from the tweeter does not.

What could be happening here.

Cool.
Srinath.
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Old 15th July 2013, 12:22 PM   #2
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Are you sure its the tweeter ?
How about disconnecting the speaker and placing say an 8 ohm /5w load on the problem amp channel .
Measure if any voltage across the resistor with no music playing
Try to eliminate the amp as a problem.
Use a resistor instead of a speaker just in case there IS a problem with the amp.
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george a
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Old 15th July 2013, 03:03 PM   #3
srinath is offline srinath  United States
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The amp is good - it playes the other speaker great as well as many others.
Put that 1 speaker in and its click off every 2-3 sec.
I will try to get the tweeter wired in with the other one. Else it may be time to part it out.

Cool.
Srinath.
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Old 16th July 2013, 04:27 AM   #4
srinath is offline srinath  United States
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The Bad ribbon when removed from the circuit reads open.
I guess I have a bad ribbon on my hands.
Why is that causing the amp to cut out though ... does it short when its got a signal ?
If I didn't connect that, the woofers make sound and that is it, amp isn't cutting out.
If I connect it, amp clicks on and off (Cuts out and back in) @ anything more than 1/8th volume ...
Cool.
Srinath.
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Old 17th July 2013, 04:14 AM   #5
a.wayne is offline a.wayne  United States
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The Carver driver was not a Ribbon.......
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Old 20th July 2013, 12:15 AM   #6
bdjohns is offline bdjohns  United States
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Location: Iowa
Srinath,
Please see how I got my BG planar tweeter DIY repaired.
BG RD50 Repair - no output
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Old 20th July 2013, 02:28 AM   #7
srinath is offline srinath  United States
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Mine could be somewhere in the middle, or where the thing goes under between the wood.
Cool.
Srinath.
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Old 21st July 2013, 11:06 PM   #8
Atom666 is offline Atom666  Canada
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I remember reading years ago that there had been contact problems with the Carver ribbon at the point where the ribbon and circuit board meet that has the two wires attached.
Andy
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Old 22nd July 2013, 12:29 AM   #9
srinath is offline srinath  United States
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I hoped so too. Mine is reading open in 1 trace ... others are about 4 ohm each.
Cool.
Srinath.
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