Chrisfromthepast
Well-known member
- Joined
- Mar 5, 2018
- Messages
- 265
I stumbled upon these donor bodies and they were way cheaper than any of the 603s clones that I’ve been playing with.
I just wanted to put it on more people’s radar before they disappear.
https://www.amazon.com/gp/aw/d/B08CBRD5SQ?psc=1&ref=ppx_pop_mob_b_asin_title.
The electronics are completely useless, and the capsule rattles around a little bit, but its a fairly nice donor body.
I like that its easy to get apart, so prototyping is less painful.
the stock capsule isn’t terrible, and shoves in the end of a 1/2” brass coupling, so I got some use out of it afterall.
I replaced the capsule with a 165a, and the friction fit was perfect.
The capsule mount is milled out of aluminum, but if a smart person were handy with casting or 3d printing, this piece could be made of a less resonant material.
Stock, this mic has serious rf and handling noise issues. With the 165a and electronics replacement, I found handling noise to be manageable.
the first one, I built with a km84 type circuit (omitting capsule polarization stuff) with nte 10:3.
It still had some rf issues until I added 100pf from each xlr signal leg to ground, and was still suffering from some of the brightness of the capsule and head basket, but overall is a delightful cheap project.
I also tried this circuit, which is a little closer to the circuit inside of the kms 105 this donor body is emulating:
https://content-instructables-com.c...=1024&width=1024&auto=webp&frame=1&height=300
this circuit is all about the op amp, which seems like a solid performer with low current demands.
Seems like a cop out compared to transistor circuits, but dang was it easy to troubleshoot!
Here is the github with gerbers and kicad files:
https://github.com/chrisfromthepast/opampmicThe pcb will also fit into mxl603s and similar, and 3/4” brass tubing
I just wanted to put it on more people’s radar before they disappear.
https://www.amazon.com/gp/aw/d/B08CBRD5SQ?psc=1&ref=ppx_pop_mob_b_asin_title.
The electronics are completely useless, and the capsule rattles around a little bit, but its a fairly nice donor body.
I like that its easy to get apart, so prototyping is less painful.
the stock capsule isn’t terrible, and shoves in the end of a 1/2” brass coupling, so I got some use out of it afterall.
I replaced the capsule with a 165a, and the friction fit was perfect.
The capsule mount is milled out of aluminum, but if a smart person were handy with casting or 3d printing, this piece could be made of a less resonant material.
Stock, this mic has serious rf and handling noise issues. With the 165a and electronics replacement, I found handling noise to be manageable.
the first one, I built with a km84 type circuit (omitting capsule polarization stuff) with nte 10:3.
It still had some rf issues until I added 100pf from each xlr signal leg to ground, and was still suffering from some of the brightness of the capsule and head basket, but overall is a delightful cheap project.
I also tried this circuit, which is a little closer to the circuit inside of the kms 105 this donor body is emulating:
https://content-instructables-com.c...=1024&width=1024&auto=webp&frame=1&height=300
this circuit is all about the op amp, which seems like a solid performer with low current demands.
Seems like a cop out compared to transistor circuits, but dang was it easy to troubleshoot!
Here is the github with gerbers and kicad files:
https://github.com/chrisfromthepast/opampmicThe pcb will also fit into mxl603s and similar, and 3/4” brass tubing
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