Search found 5462 matches
- Tue Jun 28, 2011 4:33 pm
- Forum: The Peabody Lounge
- Topic: Residential Lighting with LEDs: Retrofitting the Pink Ranch
- Replies: 149
- Views: 412403
Re: Residential Lighting with LEDs: Retrofitting the Pink Ra
A quick update 6/28/11. As I mentioned earlier, four of the 40W Sylvania snow cones just aren't bright enough. Today while shopping at Lowes I found the Utilitech (Feit Electric) LA19DIM/800/LED which is a 60W 800 lumen 3000K. I'm impressed. These babies dim very well, are bright, and don't have an ...
- Mon Jun 20, 2011 2:16 pm
- Forum: The Peabody Lounge
- Topic: Jim Williams and Bob Pease, RIP
- Replies: 5
- Views: 10647
Jim Williams and Bob Pease, RIP
Two legends are no longer with us. They will be missed:
http://www.edn.com/article/518496-Analo ... stroke.php
http://www.eetimes.com/electronics-news ... c-accident
http://www.edn.com/article/518496-Analo ... stroke.php
http://www.eetimes.com/electronics-news ... c-accident
- Fri Jun 17, 2011 8:24 pm
- Forum: Pro Audio Design
- Topic: THAT1570/5171 DIP Adapter
- Replies: 53
- Views: 75165
Re: THAT1570/5171 DIP Adapter
The two jumper arrangement looks right to me. Going back to the noise performance I seem to recall the numbers 34 uV, 12 uV and 8 uV for the 1606, "Cohen" symmetrical 1286 (flipped input dual diff amp), and "Birt" NJM2114 with -5.6 dB gain. I think the measurement BW was 100 kHz....
- Fri Jun 17, 2011 5:01 pm
- Forum: Pro Audio Design
- Topic: THAT1570/5171 DIP Adapter
- Replies: 53
- Views: 75165
Re: THAT1570/5171 DIP Adapter
IIRC on the original proto demo board the 1606 compared to Birt using a 5532/NJM2114 was at least 10-15 dB noisier. Enough to justify re-doing the board. If you don't care about maintaining output level no matter how the dumbass customers plug in, I still recommend the simpler and more symmetrical 2...
- Fri Jun 17, 2011 4:36 pm
- Forum: Pro Audio Design
- Topic: THAT1570/5171 DIP Adapter
- Replies: 53
- Views: 75165
Re: THAT1570/5171 DIP Adapter
DN-140 reference to balanced output. It's not met to be balanced/unbalanced sensing. Good basis for an A/D driver. Far, far quieter than a THAT1646, SSM2142, DRV134. The advantage is low value feedback R's which we users can't change in the 1646. http://www.thatcorp.com/datashts/dn140.pdf#page=14 We...
- Fri Jun 17, 2011 3:42 pm
- Forum: Pro Audio Design
- Topic: THAT1570/5171 DIP Adapter
- Replies: 53
- Views: 75165
Re: THAT1570/5171 DIP Adapter
My coffee hasn't completely kicked in so I am having a little trouble following that output topology. It looks like opamp section B is a unity inverter literally inside the feedback loop of section A. This can be done but generally you need to worry about stability and oscillation. JR.: This the ou...
- Fri Jun 17, 2011 3:37 pm
- Forum: The Peabody Lounge
- Topic: Texas Winter
- Replies: 44
- Views: 67407
Re: Texas Winter
I think winter may have ended:
- Sun Jun 12, 2011 7:34 am
- Forum: Pro Audio Design
- Topic: THAT1646 Current Booster and Transformer Driver
- Replies: 45
- Views: 129119
Re: THAT1646 Current Booster and Transformer Driver
RF - Thanks for the update. I'm moving right now so my response is a bit delayed. While daydreaming about electronics the other day I had thought about this very circuit where multiple devices were paralleled and used to drive headphones directly. (I think I was daydreaming while mowing :D ) You thi...
- Fri Jun 03, 2011 10:58 am
- Forum: The Peabody Lounge
- Topic: Texas Winter
- Replies: 44
- Views: 67407
Re: Texas Winter
We've almost caught-up on rainfall for the year but counties to the south and the drought remains unbroken. I saw a lake level report and the lowest around here IIRC was -3 ft. Lake Whitney/The Brazos River to the southwest ~60 miles was way down IIRC -14ft. I live on two creeks, one in Desoto the o...
- Fri Jun 03, 2011 9:56 am
- Forum: The Peabody Lounge
- Topic: Texas Winter
- Replies: 44
- Views: 67407
Re: Texas Winter
It finally melted a few days ago.
Imagine my surprise from seeing this post replied to. Thought it might have been one of our Australian members.
Imagine my surprise from seeing this post replied to. Thought it might have been one of our Australian members.