camarada78

Help me Identifying some capsule bought in an auction
« on: June 04, 2019, 03:23:54 PM »
I've recently bought some capsule lots and other microphone parts and I would like to clearly identify them. Can anyone help me?

Picture will be shown on the following posts.

Anything that is too stupid to be spoken is sung


camarada78

Re: Help me Identifying some capsule bought in an auction
« Reply #1 on: June 04, 2019, 03:25:36 PM »
I think this one is a "C-12" type unidirectional. 34mm with dual backplate, but i dont know brand or other specifications.
Anything that is too stupid to be spoken is sung

camarada78

Re: Help me Identifying some capsule bought in an auction
« Reply #2 on: June 04, 2019, 03:28:27 PM »
I think these are "k-87" types again but unidirectional with dual backplate. Not anymore info on that.
Anything that is too stupid to be spoken is sung

camarada78

Re: Help me Identifying some capsule bought in an auction
« Reply #3 on: June 04, 2019, 03:30:54 PM »
These are the ones that i'm most confused. They were sold as "k-47 type", but they are single backplate and unidirectional. Any clues?
Anything that is too stupid to be spoken is sung

Khron

Re: Help me Identifying some capsule bought in an auction
« Reply #4 on: June 04, 2019, 03:40:13 PM »
The K47 capsules, both these Chinese clones and the originals, were indeed made with a single backplate. Due to mismatches in the two sides, the ones not-close-enough for the U47's ended up in the cardioid-only U47FET's.

To improve yields and thus reduce costs, Neumann (and later, the clones) went with the "two halves" method of assembling capsules.

Just because there are two backplates, doesn't mean they're electrically isolated, and thus, they're in fact single backplate capsules, most likely.

PS: Those "K47" ones most definitely do NOT have the K47 drilling pattern; the front looks the same as the K67/K87, but the backplate's totally different.
Khron's Cave - Electronics - Audio - Teardowns - Mods - Repairs - Projects - Music - Rants - Shenanigans

camarada78

Re: Help me Identifying some capsule bought in an auction
« Reply #5 on: June 04, 2019, 04:22:19 PM »
The K47 capsules, both these Chinese clones and the originals, were indeed made with a single backplate. Due to mismatches in the two sides, the ones not-close-enough for the U47's ended up in the cardioid-only U47FET's.

To improve yields and thus reduce costs, Neumann (and later, the clones) went with the "two halves" method of assembling capsules.

Just because there are two backplates, doesn't mean they're electrically isolated, and thus, they're in fact single backplate capsules, most likely.

PS: Those "K47" ones most definitely do NOT have the K47 drilling pattern; the front looks the same as the K67/K87, but the backplate's totally different.

Yeah, you are right. Only two of the "type 87" capsules have isolated backplates. i've marked them.

In fact i was suspicious about those "k47" capsules because they look a lot like the Leory capsules in Aliexpress.

https://www.aliexpress.com/item/33030587767.html?spm=a2g0o.productlist.0.0.1d7b4d20pu1ybz&algo_pvid=52e89f7b-a3b6-4c97-bf54-244ee0aa4477&algo_expid=52e89f7b-a3b6-4c97-bf54-244ee0aa4477-0&btsid=8f4a44fe-4bba-430f-ae22-e800fba88c43&ws_ab_test=searchweb0_0%2Csearchweb201602_7%2Csearchweb201603_52

Anything that is too stupid to be spoken is sung

Khron

Re: Help me Identifying some capsule bought in an auction
« Reply #6 on: June 04, 2019, 06:26:29 PM »
It'd be interesting to measure those, actually (against a calibrated measurement mic, ideally).
Khron's Cave - Electronics - Audio - Teardowns - Mods - Repairs - Projects - Music - Rants - Shenanigans


 

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