Search found 5471 matches
- Sun Nov 11, 2012 12:18 pm
- Forum: Pro Audio Design
- Topic: Old: A Direct-Coupled Input-Capacitorless Active Mic Preamp
- Replies: 212
- Views: 413897
Re: A Direct-Coupled Input-Capacitorless Active Mic Preamp
As it turns out the fullwave bootstrapped voltage doubler (tripler) can be made with a second bridge. The entire bulk supply are the five caps and two bridges providing +/-28V and ~+85V. Two caps (100uF/100V) are to float the second bridge. The remaing caps are filters. I'm using a 15VA 36V transfo...
- Sat Nov 10, 2012 1:12 pm
- Forum: Pro Audio Design
- Topic: Old: A Direct-Coupled Input-Capacitorless Active Mic Preamp
- Replies: 212
- Views: 413897
Re: A Direct-Coupled Input-Capacitorless Active Mic Preamp
Well as it is now I get four supply voltages with only five bulk electrolytics and two "bridges" (one bridge and 4X diodes).
The extra cap provides the FW for the tripler and I get better low-line and less ripple current stress from the extra C so I'll take that.
The extra cap provides the FW for the tripler and I get better low-line and less ripple current stress from the extra C so I'll take that.
- Sat Nov 10, 2012 12:10 pm
- Forum: Pro Audio Design
- Topic: Old: A Direct-Coupled Input-Capacitorless Active Mic Preamp
- Replies: 212
- Views: 413897
Re: A Direct-Coupled Input-Capacitorless Active Mic Preamp
you could just dedicate a floating transformer winding or two, and just DC connect one end of this floated winding to the nominal Phantom voltage Yeah that's what I did in the first one. Electrolytic caps inside power amps also degrade more quickly due to increased operating temperatures, that acce...
- Sat Nov 10, 2012 7:12 am
- Forum: Pro Audio Design
- Topic: Old: A Direct-Coupled Input-Capacitorless Active Mic Preamp
- Replies: 212
- Views: 413897
Re: A Direct-Coupled Input-Capacitorless Active Mic Preamp
Maybe you can put that old gas pipeline back into service. Well they cut it, launched pigs, cleaned it, capped it and filled sections of it under streets with grout. Even if it were intact I don't think I'd want the bill just to pressurize it all the way back to Louisiana. :lol: The good news is th...
- Thu Nov 08, 2012 9:06 am
- Forum: Pro Audio Design
- Topic: Old: A Direct-Coupled Input-Capacitorless Active Mic Preamp
- Replies: 212
- Views: 413897
Re: A Direct-Coupled Input-Capacitorless Active Mic Preamp
Since I worked on this project last July I've gotten a new roof, bought a truck, helped form a neighborhood website using http://www.nextdoor.com, helped sponsor two crime watch meetings and a National Night out, found a policy conflict in Dallas' 911 aggressive animal dispatch policy using Public ...
- Wed Nov 07, 2012 2:56 pm
- Forum: Document
- Topic: Wayne's Audio, DIY, Electronics and other Bookmarks
- Replies: 1
- Views: 17540
Wayne's Audio, DIY, Electronics and other Bookmarks
Here's the link to Wayne's bookmarks updated August 21, 2021 Wayne's Electronic Bookmarks https://www.ka-electronics.com/images/html/Waynes_Bookmarks_8_21_21.html Enjoy. Tags: Audio, Electronics, Electrical Engineering, Electronic Parts Distribution, Maps, Audio Video Industry and Products, Audio S...
- Thu Nov 01, 2012 2:35 pm
- Forum: Pro Audio Design
- Topic: New THAT4316 and THAT1583
- Replies: 9
- Views: 14906
Re: New THAT4316 and THAT1583
If had to guess most of the minor differences we see in this part results from process changes and smaller die size. I'm wondering if they lowered the output stage current*, used smaller geometry input transistors, and put the current they took out of the output and moved it back to the input stage....
- Thu Nov 01, 2012 12:05 pm
- Forum: Pro Audio Design
- Topic: New THAT4316 and THAT1583
- Replies: 9
- Views: 14906
Re: New THAT4316 and THAT1583
Yep, in the same footprint. They departed from that with the 5171/5173 but probably had to in order to reduce package cost.The DI generally makes a better part, so it makes sense to have multiple versions for premium users.
- Thu Nov 01, 2012 10:11 am
- Forum: Pro Audio Design
- Topic: New THAT4316 and THAT1583
- Replies: 9
- Views: 14906
Re: New THAT4316 and THAT1583
With DI removed THAT may also be able to foundry this part using outside vendors to lower cost. The 4301 and 2252 are examples.
- Thu Nov 01, 2012 9:37 am
- Forum: Pro Audio Design
- Topic: New THAT4316 and THAT1583
- Replies: 9
- Views: 14906
Re: New THAT4316 and THAT1583
Yep I think it was a die shrink and removal of the DI process to lower cost.
DI, which requires back-grinding the wafer to reveal the implanted(?) DI "tubs" is expensive.
DI, which requires back-grinding the wafer to reveal the implanted(?) DI "tubs" is expensive.