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 1 
 on: Today at 08:38:28 AM 
Started by iipeacefrog - Last post by Kai
So, I ended up just resoldering all of the connectors, and adding a ground wire from the 3rd lug down to the low cut PCB and it seems to work just fine with no hum...it's gonna live on a floor tom here, so I think it's ok..
Watch out for all the advice on sealings and damping materials in the service manual to preserve the micís famous bass response.

Iíve attached a cutout view that shows some.

The 3rd lug probably is just a soldering post for connecting the hum compensation coil, grounding it (with the coil removed) doesnít do anything good or bad.

 2 
 on: Yesterday at 10:51:11 AM 
Started by iipeacefrog - Last post by panman
.....and adding a ground wire from the 3rd lug down to the low cut PCB and it seems to work just fine with no hum...
Yes, it works just fine, but grounding the third lug is totally unnecessary. Instead, you should connect the added wire to the grill to keep the hum and other disturbances away in most situations.

 3 
 on: Yesterday at 04:43:04 AM 
Started by iipeacefrog - Last post by iipeacefrog
So, I ended up just resoldering all of the connectors, and adding a ground wire from the 3rd lug down to the low cut PCB and it seems to work just fine with no hum...it's gonna live on a floor tom here, so I think it's ok..

 4 
 on: Yesterday at 02:29:34 AM 
Started by iipeacefrog - Last post by panman
Late for the show. You already got all you need. I only want to add, that it is advisable to connect the capsule without the humbucking-coil and test if it is ok with full bass and reproduction of all frequencies. also be careful not to use too much heat when soldering the terminations. The plastic top of the capsule melts easily and in the worst case the soldering-lugs can melt the diaphram or the silk cover or both.

 5 
 on: December 07, 2022, 01:26:08 PM 
Started by iipeacefrog - Last post by iipeacefrog
Thank you!

 6 
 on: December 07, 2022, 01:05:50 PM 
Started by iipeacefrog - Last post by Kai
For the coil only the number of turns is important.
The uH or wire gauge doesnít matter.

Maybe you can untangle the ratís nest to determine the wire length.
Cut it here and there and stick it together afterwards.

The screw for the back assembly is located under the little name plate in the standmount slot.

The Large Tuchel insert can be pulled out if itís two back screws are removed from the outside.

Hereís the MD 421 service manual:
https://www.manualscenter.com/manuals/sennheiser/md421-service-manual.html#.Y5DUOy3GJOk

Iíve attached itís 2 pages either.

 7 
 on: December 07, 2022, 12:19:16 PM 
Started by toranrt - Last post by Keiton
Still, if you want to order yourself some good software that is written with quality, I could help you with that. For example, I would recommend that you go to this site Perfsol . I would tell you that this is the best option for you to find this option for yourself and try really without any problems to order yoursel writing of software.

 8 
 on: December 07, 2022, 11:08:26 AM 
Started by toranrt - Last post by toranrt
By the way, do you think it's a good idea to find the best software company for yourself right now? I would be very grateful for all your advice.

 9 
 on: December 06, 2022, 01:00:21 PM 
Started by toranrt - Last post by toranrt
Все таки знайти для себе гарне казино, зараз можна абсолютно без будь-яких проблем. Упевнений, що в цьому немає нічого складного, адже я вже зміг це зробити саме на даному сайті vikings go berzerk . Саме тут я зміг знайти собі тільки казино, в якому можна дуже легко заробляти і яке є одним з найбільш крутих. Я як людина, у якої є великий досвід у грі в казино можу сказати вам, що це безперечно найкраще місце, де зараз можна було б вибрати для себе казино.

 10 
 on: December 06, 2022, 12:27:10 PM 
Started by iipeacefrog - Last post by RuudNL
It happens more often...

A friend of mine once had a MD421 with a damaged hum compensation coil.
Since there was no information available, I decided to remove the compensation coil and connect the capsule wires directly to the output connector.

As long as you don't use the microphone near transformers (which is often the case) this shouldn't cause problems.

Maybe not an award winning solution, but the microphone worked again and he had never problems after this 'repair'...

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