Search found 5471 matches
- Thu Apr 14, 2011 10:54 am
- Forum: Pro Audio Design
- Topic: THAT1646 Current Booster and Transformer Driver
- Replies: 45
- Views: 129575
Re: THAT1646 Current Booster and Transformer Driver
There's alot to be said for galvanic isolation.
- Wed Apr 13, 2011 8:11 pm
- Forum: The Peabody Lounge
- Topic: Entropy
- Replies: 1312
- Views: 1159286
Re: Entropy
My Toro has a Briggs and Stratton. It's just a push mower with the self-paced self-propelled feature. We have about 1/3rd of an acre where we live now and it's not a difficult mow. At the new place, which is about 1-1/4 acres, most of it is wooded. The mowable yard is about the same. I don't think I...
- Wed Apr 13, 2011 7:22 pm
- Forum: The Peabody Lounge
- Topic: Entropy
- Replies: 1312
- Views: 1159286
Re: Entropy
I wonder if the ethanol in gas is trashing stuff Yes, it eats up rubber in chainsaws. My mowers don't get enough of a rest for it to happen but I've had stored gas in a chainsaw eat up rubber in less than a year. They say stabilizers help and I do use them now but on the chainsaws I just drain them...
- Wed Apr 13, 2011 7:07 pm
- Forum: Pro Audio Design
- Topic: THAT1646 Current Booster and Transformer Driver
- Replies: 45
- Views: 129575
Re: THAT1646 Current Booster and Transformer Driver
David Birt (ex BBC) had the speaker & amp in a DC bridge to compensate for this on the fly. I've followed David's work on audio interfaces and did a fair amount of work adapting his line reciver to the 1570 mic preamp. Small world. http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=6&...
- Wed Apr 13, 2011 2:04 pm
- Forum: The Peabody Lounge
- Topic: Residential Lighting with LEDs: Retrofitting the Pink Ranch
- Replies: 149
- Views: 418027
Residential Lighting with LEDs: Retrofitting the Pink Ranch
Just prior to remodeling the "atomic ranch" , the incandescent light bulb was issued a delayed death sentence by an act of Congress. Updated 4/25 added Cree CR6. I love the way incandescents look, they're cheap, easily dimmed and - when needed - warm a room. Based on what I've read, the 1...
- Wed Apr 13, 2011 9:36 am
- Forum: Pro Audio Design
- Topic: THAT1646 Current Booster and Transformer Driver
- Replies: 45
- Views: 129575
Re: THAT1646 Current Booster and Transformer Driver
Once again I am shocked... Low distortion transformers seem counter productive for all the folks who use them solely to add coloration. Yeah, well. I suppose one could put a knob on the negative impedance and label it "color." Crusty, you readin' this? There is a lot to be said for a dab ...
- Wed Apr 13, 2011 4:05 am
- Forum: Pro Audio Design
- Topic: THAT1646 Current Booster and Transformer Driver
- Replies: 45
- Views: 129575
Re: THAT1646 Current Booster and Transformer Driver
Thanks for the link. I saved it. I think Audio Precision got a patent on something similar as well which they used in the original System One. It is now expired. I may have a copy of that somewhere... Hofer, "Low-Distortion Transformer-Coupled CIrcuit," US Patent 4614914. http://www.proaud...
- Tue Apr 12, 2011 8:16 pm
- Forum: Pro Audio Design
- Topic: PSU design assistance needed
- Replies: 35
- Views: 52939
Re: PSU design assistance needed
Yes Q19 is a mpsA06 a higher current and higher voltage part than the 3904 but still only a to-92 so it is important that this device is turned on hard (saturated switch) and turned off hard. This hard on/off is accomplished by the 47k from the raw unregulated. The snap off hysteresis occurs becaus...
- Tue Apr 12, 2011 9:25 am
- Forum: Pro Audio Design
- Topic: PSU design assistance needed
- Replies: 35
- Views: 52939
Re: PSU design assistance needed
The third figure down in the TS-1 post (also below) looks pretty clear to me. I'd right-click save-as offline and zoom. JR can explain the circuit. FWIW Q19 looks to be an MPSA06.
- Mon Apr 11, 2011 8:20 pm
- Forum: Document
- Topic: Re: Cyril Bateman Capacitor Sound Archive
- Replies: 13
- Views: 135727
Re: Cyril Bateman Capacitor Sound Archive
I'll have the art department start on a logo.only thing missing is the "hand carved by virgins from Unobtainium" label.