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#1
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Beyer M160 Grill Removal
The grill of one of my M160's has taken a dent. It doesn't affect the
performance, but I find it distracting. The tiny screws under the red dots don't seem to want to respond to my screwdriver. Just in case: are they reverse thread? If not, and it's just that they have never been removed (I bought these new in 1975; had 'em rebuilt in Germany in 1982 after lots of use at onion audio and onstage at Armadillo World Headquarters), can I put a tiny droplet of something like WD-40 on them to try to get them to give it up for me? -- ha shut up and play your guitar |
#2
Posted to rec.audio.pro
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Beyer M160 Grill Removal
hank alrich wrote:
Just in case: are they reverse thread? They're standard right-hand thread, but they're very tiny and the slots aren't very deep. I also think they may have some sort of locking compound on them. I had a similar problem getting an M-260 open. Having a really good screwdriver helps. I took mine over to a friend with a well equipped shop and a full set of Wima screwdrivers. When he found the perfect fit, the screws came out (with a little difficulty). At the time, Beyer had a cooperative parts department and, when I lost one of the screws, they sent me a few for free. Sometimes just knowing that it's possible helps to get a difficult job done. That's about all the help I can offer. -- If you e-mail me and it bounces, use your secret decoder ring and reach me he double-m-eleven-double-zero at yahoo -- I'm really Mike Rivers ) |
#3
Posted to rec.audio.pro
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Beyer M160 Grill Removal
Soundhaspriority wrote:
"hank alrich" wrote in message ... The grill of one of my M160's has taken a dent. It doesn't affect the performance, but I find it distracting. The tiny screws under the red dots don't seem to want to respond to my screwdriver. Just in case: are they reverse thread? If not, and it's just that they have never been removed (I bought these new in 1975; had 'em rebuilt in Germany in 1982 after lots of use at onion audio and onstage at Armadillo World Headquarters), can I put a tiny droplet of something like WD-40 on them to try to get them to give it up for me? That is an interesting problem, which I encountered in movie camera repair. The optimal chemical depends on what's holding the screw. WD-40 is never optimal. If the screw is held by oxidative corrosion, a penetrating oil is the thing. But an old camera repairman explained to me that in many cases, the screw is stuck by paint. He very patiently dripped acetone from an eyedropper on the screw until it gave up. This takes patience, because the acetone evaporates almost instantly. If the screw is held by a threadlocker, I think acetone might still be optimal. There are different types of threadlocker. One very politely gives up when you finally exert enough force with your Wiha screwdriver (and I do hope you're using a Wiha, not a carbon-steel Radio Shack job). If, however, the threadlocker is one of the high strength formulas, it's a specialist job. Acetone worked for me on Angenieux optics. Maybe it'll work for you. Hank, I'm sure you know this, but from what I've read, even a mild breeze can break an exposed ribbon. I would leave it alone. I should talk; it would drive me crazy, but it's your mike This is not my first adventure into the innards of a ribbon mic. Interesting thing is that this query posted into K Heine's forum at PSW drew but a single comment, and nothing at all from the "experts". Guess since it's not some fake U47 they don't know anything about it. Thanks for you comments, Bob. -- ha shut up and play your guitar |
#4
Posted to rec.audio.pro
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Beyer M160 Grill Removal
Mike Rivers wrote:
hank alrich wrote: Just in case: are they reverse thread? They're standard right-hand thread, but they're very tiny and the slots aren't very deep. I also think they may have some sort of locking compound on them. I had a similar problem getting an M-260 open. Having a really good screwdriver helps. I took mine over to a friend with a well equipped shop and a full set of Wima screwdrivers. When he found the perfect fit, the screws came out (with a little difficulty). At the time, Beyer had a cooperative parts department and, when I lost one of the screws, they sent me a few for free. Sometimes just knowing that it's possible helps to get a difficult job done. That's about all the help I can offer. Thanks, Mike. -- ha shut up and play your guitar |
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