speakercoil
Well-known member
- Joined
- Apr 16, 2009
- Messages
- 138
Hey guys...
So yes me again with more mic build questions/info, etc... I know I already have a thread about the U47 clone I am planning on building (which will happen and I have already started buying parts), but since that is a time/wallet consuming labor of love, I am also working on other projects in the meantime. I am going to do a G7 soon, but that is being put on pause until Skylar's bodies are finished.
In the meantime I am going to attempt a Sela T-12 inspired build! It is about as simple as a mic can get in the schematics...
http://www.filmsoundsweden.se/backspegel/sela.html
However I cannot for the life of me find a PSU schematic anywhere. I know Mike has been very interested in building one of these as well and we have been searching everywhere. So I am finally after about a month and a half of asking questions else where deciding to call on the help of the geniuses that reside on this forum!
Are there any other mic PSU's which may work for this mic, or will I have to get a custom design or have someone custom build one for it?
The capsule I plan on using will be an M7, the tube is a 6AK5, and Oliver told me a BV8 would work for this design. However Oliver offered some advice on changing the values around a little.
"just with seeing your schematic the BV8 should work with the 6AK5. Only modification I would do it to change the 0.5 cap to 1uF.
The cathode resistor is a bit low for my taste but a suggestion based on a schematic is always difficult. A 3k potentiometer should help you to figure
the best bias point."
As I know myself and I would sit for days and weeks and still not decide on a value if I had a 3k pot and tested the resistor value... Could anyone give a recommendation on a good value there?
I plan on using a Bees Neez body for this project. Already have some old NOS Siemens 1uf caps lying around as well.
Anyway as I want this to be my next project I was hoping to get info soon. The build will become my second instructional video after I post the Apex 460 mod one.
I think this would be an awesome build and extremely easy to do point to point... Trying to figure out how I will mount the tube, but I will figure that out once I get down and dirty with this project.
Alright enough rambling... Let me know! Oh, and I will pass the word along to Mike, unless he sees this thread... Which I am sure he probably will. lol.
Thanks,
-Grant
PS: I know a few people on here actually own Sela's... If any of them own a T-12 it would be awesome to see the inside of the PSU!!!!
So yes me again with more mic build questions/info, etc... I know I already have a thread about the U47 clone I am planning on building (which will happen and I have already started buying parts), but since that is a time/wallet consuming labor of love, I am also working on other projects in the meantime. I am going to do a G7 soon, but that is being put on pause until Skylar's bodies are finished.
In the meantime I am going to attempt a Sela T-12 inspired build! It is about as simple as a mic can get in the schematics...
http://www.filmsoundsweden.se/backspegel/sela.html
However I cannot for the life of me find a PSU schematic anywhere. I know Mike has been very interested in building one of these as well and we have been searching everywhere. So I am finally after about a month and a half of asking questions else where deciding to call on the help of the geniuses that reside on this forum!
Are there any other mic PSU's which may work for this mic, or will I have to get a custom design or have someone custom build one for it?
The capsule I plan on using will be an M7, the tube is a 6AK5, and Oliver told me a BV8 would work for this design. However Oliver offered some advice on changing the values around a little.
"just with seeing your schematic the BV8 should work with the 6AK5. Only modification I would do it to change the 0.5 cap to 1uF.
The cathode resistor is a bit low for my taste but a suggestion based on a schematic is always difficult. A 3k potentiometer should help you to figure
the best bias point."
As I know myself and I would sit for days and weeks and still not decide on a value if I had a 3k pot and tested the resistor value... Could anyone give a recommendation on a good value there?
I plan on using a Bees Neez body for this project. Already have some old NOS Siemens 1uf caps lying around as well.
Anyway as I want this to be my next project I was hoping to get info soon. The build will become my second instructional video after I post the Apex 460 mod one.
I think this would be an awesome build and extremely easy to do point to point... Trying to figure out how I will mount the tube, but I will figure that out once I get down and dirty with this project.
Alright enough rambling... Let me know! Oh, and I will pass the word along to Mike, unless he sees this thread... Which I am sure he probably will. lol.
Thanks,
-Grant
PS: I know a few people on here actually own Sela's... If any of them own a T-12 it would be awesome to see the inside of the PSU!!!!