mitsos
Well-known member
- Joined
- May 4, 2007
- Messages
- 2,886
Hi everyone. My first post, not counting all the "I'll take two of those please" and thank yous. A very simple project compared to anything else here, but I have some simple questions, which were not answered in the other splitter topics, and I hope someone can help.
This all started because I needed to build a 4 channel, 2-way mic splitter. I bought 4 Jensen JT-MB-C transformers, and planned to use them with a direct out as the data sheet shows:
http://jensentransformers.com/datashts/mbc.pdf
Then, I saw this:
http://jensentransformers.com/as/as015.pdf
and thought I'd combine the two. Except I will need DC blocking caps, right(?), in case someone (not me, of course :wink: ) sends phantom to my line source? The guy at Jensen also told me I should use bleed resistors if I use a switch for the pad, so I don~t get any crazy thumps flipping the switch. OK... so there is a schematic at the bottom, frankensteined from the ones on jensens site. It's cleaner than it would be if I did it by hand. I put dots where I think the caps might go and put a question mark at the "signal ground" from the original Jensen mic/line schematic (do I need this?)
My questions I would be forever grateful to have answered are:
1. Are the caps supposed to go where the green dots are or the red, or somewhere else? What value should I use?
2. Do the bleed resistors just connect the caps to ground? Again, what value?
3. Do I need the "signal ground"?
4. Anything else glaringly wrong with this idea??
Thank you!
dimitri
my schematic:
[img=http://img180.imageshack.us/img180/9964/splitterschem2np6.th.jpg]
This all started because I needed to build a 4 channel, 2-way mic splitter. I bought 4 Jensen JT-MB-C transformers, and planned to use them with a direct out as the data sheet shows:
http://jensentransformers.com/datashts/mbc.pdf
Then, I saw this:
http://jensentransformers.com/as/as015.pdf
and thought I'd combine the two. Except I will need DC blocking caps, right(?), in case someone (not me, of course :wink: ) sends phantom to my line source? The guy at Jensen also told me I should use bleed resistors if I use a switch for the pad, so I don~t get any crazy thumps flipping the switch. OK... so there is a schematic at the bottom, frankensteined from the ones on jensens site. It's cleaner than it would be if I did it by hand. I put dots where I think the caps might go and put a question mark at the "signal ground" from the original Jensen mic/line schematic (do I need this?)
My questions I would be forever grateful to have answered are:
1. Are the caps supposed to go where the green dots are or the red, or somewhere else? What value should I use?
2. Do the bleed resistors just connect the caps to ground? Again, what value?
3. Do I need the "signal ground"?
4. Anything else glaringly wrong with this idea??
Thank you!
dimitri
my schematic:
[img=http://img180.imageshack.us/img180/9964/splitterschem2np6.th.jpg]