Search found 5473 matches
- Sat Nov 13, 2010 5:12 pm
- Forum: Pro Audio Design
- Topic: THAT1646 Current Booster and Transformer Driver
- Replies: 45
- Views: 129733
Re: THAT1646 Current Booster and Transformer Driver
Roger - You can indeed drop the 33R build-out to drive a transformer. It's there only for driving phones and hearing protection. Some phones in fact may sound better without it. As a direct-coupled line driver using no transformer, the circuit is capacitive load stable as well without the 33R. The o...
- Sat Nov 13, 2010 10:13 am
- Forum: Document
- Topic: dBx 3BX Three Band Dynamic Range Expander
- Replies: 8
- Views: 18891
Re: dBx 3BX Three Band Dynamic Range Expander
Those active cap multipliers with diode clamps to make it fast for large changes and slow for small changes is very similar to a circuit I did in the '80s for a NR... While I added a few other tricks too, it was the same general concept. Still found as the NLC in the Pico and THAT DN-114: http://ww...
- Wed Nov 03, 2010 3:26 pm
- Forum: Pro Audio Design
- Topic: VCA Compressor Gain Reduction Limit
- Replies: 26
- Views: 52860
- Tue Oct 26, 2010 9:05 pm
- Forum: The Peabody Lounge
- Topic: is it just me
- Replies: 8
- Views: 16860
Re: is it just me
PS: Don't forget to vote early and often in mid term election coming up. Well, I guess the year going fast was a good thing. :D Still, I'll miss summer. From August to September I got two houses exteriors painted and only lost maybe three days to rain. I suppose by mid November I'll have to give up...
- Tue Oct 26, 2010 2:54 pm
- Forum: The Peabody Lounge
- Topic: is it just me
- Replies: 8
- Views: 16860
Re: is it just me
Wasn't it the UV reacting with CFCs that was going to end life as we know it? :D With UV declining does this mean we can start using real Freon cleaners again? "They [the solar cycles] are contributing nothing to long-term global warming," she said, "and it has no bearing on what we u...
- Tue Oct 26, 2010 1:41 pm
- Forum: The Peabody Lounge
- Topic: is it just me
- Replies: 8
- Views: 16860
Re: is it just me
Seems fast to me too. Not ready for Summer/Indian Summer to end.
- Mon Oct 11, 2010 1:39 pm
- Forum: Pro Audio Design
- Topic: console grounding
- Replies: 12
- Views: 20586
Re: console grounding
I think you may want to tie everything to ground. Now that this thing has become an SE version (with both halves of the 1570 doing both L&R) there's no virtual ground summing node for the - leg. That just occured to me. With CM rejection only being realized in the 1240, the source impedance feed...
- Mon Oct 11, 2010 12:20 pm
- Forum: Pro Audio Design
- Topic: console grounding
- Replies: 12
- Views: 20586
Re: console grounding
Yes a direct path to ground. The VCA should go directly to ground and most other nodes as well. I'd use that extra pin and tie a resistor from it to ground. That build-out resistor would feed the - leg of the bus. Have you also looked at connecting pins 3 of the 1240s (U3 and U6 after the 1570) to t...
- Mon Oct 11, 2010 11:57 am
- Forum: Pro Audio Design
- Topic: console grounding
- Replies: 12
- Views: 20586
Re: console grounding
I don't think you want R18 where you have it. I think that node needs to be ground (R18=0R). You may need another pin on the connector. I really need to look at the dwg on a printed copy. EDIT - What I meant by "quasi-balanced" is that only the + leg was driven. They couldn't field modify ...
- Mon Oct 11, 2010 11:48 am
- Forum: Pro Audio Design
- Topic: console grounding
- Replies: 12
- Views: 20586
Re: console grounding
FYI drawings don't auto scale here. I can't remember if it's broken or a board mod is required. I try to limit mine to 700 pix or so. I'll save your drawing off-line so I can look at it.