Greetings all,
I'm in the midst of an attempt to give a tube head amp to the MV101 mic. Like my other mod, I'm using the body and capsule and mounting my own tube circuit into the mix. This is a different kind of mic than I've ever tried to build before as the capsule is designed for 200v. I'm trying to wrap my head around designing this and this is what i've come up with so far.
Set my universal regulated PSU to 200v for the capsule and divide it down to 120v for B+ voltage...
![1724277539748.png 1724277539748.png](https://cdn.imagearchive.com/groupdiy/data/attachments/87/87210-1c4db91b133296540d1814f29e909e32.jpg)
However, I am only getting 46v coming off the voltage divider before the 100k plate load resistor. My estimation was to see the 120v there... When I pull the 100k out of the circuit I do see the 120v... Am I missing something here?
This is gonna be a cool mic if I can get it going. Cute little tube mic.![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Thanks in advance for any advice.
![1724277838261.png 1724277838261.png](https://cdn.imagearchive.com/groupdiy/data/attachments/87/87211-9ad1a71f8aa0022b2855898517a4b789.jpg)
I'm in the midst of an attempt to give a tube head amp to the MV101 mic. Like my other mod, I'm using the body and capsule and mounting my own tube circuit into the mix. This is a different kind of mic than I've ever tried to build before as the capsule is designed for 200v. I'm trying to wrap my head around designing this and this is what i've come up with so far.
Set my universal regulated PSU to 200v for the capsule and divide it down to 120v for B+ voltage...
![1724277539748.png 1724277539748.png](https://cdn.imagearchive.com/groupdiy/data/attachments/87/87210-1c4db91b133296540d1814f29e909e32.jpg)
However, I am only getting 46v coming off the voltage divider before the 100k plate load resistor. My estimation was to see the 120v there... When I pull the 100k out of the circuit I do see the 120v... Am I missing something here?
This is gonna be a cool mic if I can get it going. Cute little tube mic.
Thanks in advance for any advice.
![1724277838261.png 1724277838261.png](https://cdn.imagearchive.com/groupdiy/data/attachments/87/87211-9ad1a71f8aa0022b2855898517a4b789.jpg)