| argonrepublic |
I know it's not major but for me it is. I finally got my balanced output stage working. I used my ext. power supply, two non polar 47uf caps for decoupling on a single sided pcb with DRV134 IC. I ran line outs from a consumer cd player, one side to a -10dbu unbalanced connection. The other side I ran through line driver. I didn't give it a good listen but It doesn't sound worse and it is +4dbu balanced. From here I assume that ground plane, decoupling cap selection, output caps and cabling will determine the subtle improvements. Don't comment! You guys need a break from my posts!
I trust that I wont completely be at the mercy of corporate junk from here on in and I know I have a long way to go. It seems every piece of gear out there has its own exclusive shortcoming. Do they plan it that way?
I am so greatful to all of your willingness to share your hard earned experience. The time that you have given is worth more than the best piece of equipment. |
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| Stocker |
Every commercial design is for a specific set of goals. Sometimes a company will completely overlook a big weakness to get what they think they are after.
I'm glad you got your circuit working.
Feel free to join all your posts on a topic into one long thread next time, so everyone will know what you are talking about from the start. Don't be afraid of making them too long; Several hundred pages is the current record and a thousand times that many page-views.
Welcome to DIY electronics... there will be very little hope of turning back now! :D |
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| argonrepublic |
| I sent a sine wave at 0dbfs out of a -10dbu unbalanced output. I ran that signal through my new balanced line driver, returning to an input referenced to +4dbu. My recorded signal is -9.37dbfs. What is my next step? I have an INA137 here. Can I make a unity gain recever, driver with the two? Adding head phone and volume control later? |
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| AndrewT |
Hi,
what is dbfs? |
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| argonrepublic |
Odbfs is digital full scale. Maximum level in digital before clipping.
So the book says. |
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