Hi Guys,
I've been over at this really old thread and instead of reviving it, I figured I would start a new one.
http://www.groupdiy.com/index.php?topic=10077.0
I picked one an MXL 9000 used for $50 a couple of weeks ago. Tried it out and it was harsh! Popped in a NOS JAN GE 6072A and it really smoothed things out. Was still suffering from a ridiculous proximity effect though an the mic was basically unusable for vocals within six inches. Based on discussions in the aforementioned thread I replaced the stock transformer with a Cinemag CM-2480 (10:1 I think), removed C3 (9pf) and replaced the 33uF electrolytic cap at C6 with a 1uF polypropylene cap. This mic is now amazingly better! No overhyped proximity effect, sounds nice from any distance, plenty of gain, massive drop in self noise compared to stock.
Now here are my questions:
1.) Would it be worthwhile lowering the value of R7 from 6.2k to 2.2k to 2.7K? What effect would this have?
2.) Would it be worthwhile replacing the stock capsule for another? I have a Studio Projects C1 and an MXL V67G I would be able to swap capsules with if it would be considered much of an upgrade.
3.) Are there any other mods which come to mind e.g. Power Supply, Headbasket etc...
4.) Anybody know any good tube mic designs which could incorporate any of the capsules I have available to me and the Cinemag CM-2480 if I were to replace the PCB altogether?
Thanks!!!
Kris (the enchilada)
I've been over at this really old thread and instead of reviving it, I figured I would start a new one.
http://www.groupdiy.com/index.php?topic=10077.0
I picked one an MXL 9000 used for $50 a couple of weeks ago. Tried it out and it was harsh! Popped in a NOS JAN GE 6072A and it really smoothed things out. Was still suffering from a ridiculous proximity effect though an the mic was basically unusable for vocals within six inches. Based on discussions in the aforementioned thread I replaced the stock transformer with a Cinemag CM-2480 (10:1 I think), removed C3 (9pf) and replaced the 33uF electrolytic cap at C6 with a 1uF polypropylene cap. This mic is now amazingly better! No overhyped proximity effect, sounds nice from any distance, plenty of gain, massive drop in self noise compared to stock.
Now here are my questions:
1.) Would it be worthwhile lowering the value of R7 from 6.2k to 2.2k to 2.7K? What effect would this have?
2.) Would it be worthwhile replacing the stock capsule for another? I have a Studio Projects C1 and an MXL V67G I would be able to swap capsules with if it would be considered much of an upgrade.
3.) Are there any other mods which come to mind e.g. Power Supply, Headbasket etc...
4.) Anybody know any good tube mic designs which could incorporate any of the capsules I have available to me and the Cinemag CM-2480 if I were to replace the PCB altogether?
Thanks!!!
Kris (the enchilada)