Dating senheiser 421

24-Nov-2019 13:50

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.They, too, lived alongside crumbling foam for a long time.Eventually I put them into plastic bags to keep the bits of foam out, and finally, I threw out the old foam and now keep them in cloth bags.

As I recall, the M-S selector is for selecting either Music or Speech.oops I made a mistake...68908 is from 1991....there's a #66702 is from 1989 on e-bay now(do a search for "md-441" with the dash between the MD and the 441) for 9 w/out the case & a non clicking but functional clip. The #42200 from 1985 is a 24000 difference for 4 years...which doesn't follow any steady manufacturing trend. But most people wantig to date it already have one.Anyway, an old one could have been lovingly cared for by a single user amd a newer one could be well beaten up by being roughly used onstage by people who cou;dn't care about keeping it nice. It was thin sounding with no bass, or put differently: loss of low end.Searching the internet, it becomes clear that it is actually a very common problem, but no real solutions are given otherwise that the mic is at the end of its life. However it is mentioned that an iron dust ring, or a torn or otherwise damaged membrane might be the cause. Yes, your desk is littered with it even if you do not see it! Then, the microphone needs to be taken apart in its separate components: The screw to open the mic is located underneath the serial number plate. Mine was difficult to open because the connector fits very well.

As I recall, the M-S selector is for selecting either Music or Speech.oops I made a mistake...68908 is from 1991....there's a #66702 is from 1989 on e-bay now(do a search for "md-441" with the dash between the MD and the 441) for 9 w/out the case & a non clicking but functional clip. The #42200 from 1985 is a 24000 difference for 4 years...which doesn't follow any steady manufacturing trend. But most people wantig to date it already have one.Anyway, an old one could have been lovingly cared for by a single user amd a newer one could be well beaten up by being roughly used onstage by people who cou;dn't care about keeping it nice. It was thin sounding with no bass, or put differently: loss of low end.Searching the internet, it becomes clear that it is actually a very common problem, but no real solutions are given otherwise that the mic is at the end of its life. However it is mentioned that an iron dust ring, or a torn or otherwise damaged membrane might be the cause. Yes, your desk is littered with it even if you do not see it! Then, the microphone needs to be taken apart in its separate components: The screw to open the mic is located underneath the serial number plate. Mine was difficult to open because the connector fits very well.Looking though my reading glasses AND a strong magnifying glass using a bright light source (adjustable IKEA LED) I was able to see some hints of iron dust underneath the (nylon? In the picture above you can see that the the dust protection is molten to the black plastic ring aroung the mic (the black dots in the pic.).