Dating senheiser 421
To get to the capsule, remove the 4 screws found on the 4 corners of base. Note that you have to hold the capsule in your (steady) hand very close to the eye using a strong light reflected from the membrane otherwise you will not be able to see it. It will require considerable force, thus it is a nerve wracking bussiness. Do not tear the dust protection too much as it needs to be glued back later when ready!
It is the membrane, sometimes called diaphragm, of the capsule I wanted to verify. Also, do NOT remove the hum compensating induction coil on top of the capsule.
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The iron dust weight is very little, but because of the pull of the magnet in the capsule, it pulls the membrane to the magnet.
Thus it will not be able to move freely and will loose bass. The solution is to magnetise a VERY small steel screwdriver (used to fix watches) with a permanent magnet.
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As I recall, the M-S selector is for selecting either Music or Speech.
I still have the original box but the foam inside turned gooey and melted. I had it stored in perfect condition inside of it's box for about 15 years.
I had it stored in perfect condition inside of it's box for about 15 years. It was a wonderful microphone but was damaged by the packing material Sennheiser used for protection.
My 441's have not been degraded by their experience. If and when you do find out a roundabout date, buy YOURSELF a drink.
I did vacuum the last bits of foam crumble out of the windscreen using a brush tip on the vacuum. root aka Bob G Sorry to spark up this thread once again but i recently managed to acquire a Md441 for the bargain price of £175 (0) with the serial number 16276 making me think from others serial numbers that it may be an early 70's model?The microphone was outside still in good shape and not physically abused, so my guess was that it had to do with iron dust…… Force is needed, but not so much to break the plastic. If the connector is out of the way, you will see a nut on the inside of the mic holding the capsule mounting rod.