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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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AR5 tweeter problems.
I have an old set of AR5's from 1969. One of the
speakers makes a raspy/distorted noise on playback of hi frequency sounds. I have noticed that at the base of the paper cone there is a connective seal, like glue. On the tweeter in question there are some open gaps in the glue. Could this cause the distortion? Can I glue this area to help secure the cone and reduce distortion? |
#2
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AR5 tweeter problems.
"lordlewis" wrote in message ps.com... I have an old set of AR5's from 1969. One of the speakers makes a raspy/distorted noise on playback of hi frequency sounds. I have noticed that at the base of the paper cone there is a connective seal, like glue. On the tweeter in question there are some open gaps in the glue. Could this cause the distortion? Can I glue this area to help secure the cone and reduce distortion? No, no, no, no, no! If you GENTLY push the cone in and out trying to keep it even (don't push in one spot) is there a rubbing sound? If so, the coil has distorted or turns have come off. Repair or replace. |
#3
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AR5 tweeter problems.
Homer J Simpson wrote:
"lordlewis" wrote in message ps.com... I have an old set of AR5's from 1969. One of the speakers makes a raspy/distorted noise on playback of hi frequency sounds. I have noticed that at the base of the paper cone there is a connective seal, like glue. On the tweeter in question there are some open gaps in the glue. Could this cause the distortion? Can I glue this area to help secure the cone and reduce distortion? Do you mean holes in the suspension? If so, how big? Small holes are harmless. No, no, no, no, no! If you GENTLY push the cone in and out trying to keep it even (don't push in one spot) is there a rubbing sound? If so, the coil has distorted or turns have come off. Repair or replace. To see if this is the problem, push at the edge of the voice coil (not the edge of the cone), move round pushing at each spot. If this slight offcentredness causes grating/rubbing, either the voice coil has partially come loose or the cone needs recentering. The need for offcentred pushing is that the paper structure will bend during use, so pushing it centredly may fail to show up an existent problem. Either way you'd need to remove the paper cone from the tweeter frame. Carefully. Recentering something as smsll as a tweeter should be fun. Its doable but not easy. Rewinding a voice coil is straightforward enough if you can get the old wire off, but a sod if its stuck solid - as it should be. NT |
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