Search found 25 matches
- Mon Oct 14, 2013 8:17 pm
- Forum: Pro Audio Design
- Topic: Using the LM317/LM337 as Shunt Regulators/Zeners
- Replies: 1
- Views: 9456
Re: Using the LM317/LM337 as Shunt Regulators/Zeners
Very very clever. You had me scratching my head at first with the pos/neg info...
- Fri Aug 09, 2013 6:43 pm
- Forum: Pro Audio Design
- Topic: DIY LED Strobe.
- Replies: 19
- Views: 39689
Re: DIY LED Strobe.
I feel like you are working a little too hard to amuse drummers - don't they usually amuse easier than that?
- Fri Aug 02, 2013 6:05 pm
- Forum: Pro Audio Design
- Topic: DIY LED Strobe.
- Replies: 19
- Views: 39689
Re: DIY LED Strobe.
I would think that having visual feedback in that application could make a large difference in how easy it is (for some people) to get consistent results. Very interesting idea.
- Mon Jul 08, 2013 1:35 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
Running the mics from full rated voltage will buy a couple dB more headroom. I don't know what the ratings are for sure on these particular capsules, I don't have a part number or a data sheet at the moment. Similar capsules seem to be rated at 10V, though, and I may indeed tweak the adjustable vol...
- Sun Jul 07, 2013 11:57 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
The circuitry is working perfectly, thanks for the help with it, Pros! Now it's just a matter of tweaking. With the electret omnis, located just outside the Leslie cabinet's louvers, I get a lot of leakage from my other sources. (I had been using dynamic mics tucked INSIDE the Leslie cabinet previou...
- Sat Jul 06, 2013 10:39 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
I installed an LM317 to regulate the mics' power node. It's adjusted to 7.8 V (the data sheets I've seen on similar electret capsules call for a max of 10V, and I didn't have the exact resistors handy to get 9V on the LM317) and the system is behaving perfectly now - at least, according to the 'scop...
- Wed Jul 03, 2013 5:21 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
Update: Harsh, distorted sound. Accidentally I forgot to pan the two channels apart so I don't know if I heard a blend of one clean channel with one distorted, or what exactly. Looking at the scope, one channel was passing a strange waveform compared to the other. It's not exactly easy to get a pure...
- Mon Jun 24, 2013 3:58 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
An update: My oscilloscope probes came in and I had a bit of time today to test the "Leslieator" out. It's working just fine and the oscillations went away as soon as I attached a clip lead between the body of the unit and my scope's ground connection. It just wasn't happy floating without...
- Tue Jun 18, 2013 3:58 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
Thanks!
I have just nipped the mistaken R's, and shot a couple of pics of the build-up. Also the schematic is now corrected for 800 Hz and no R's shunting the virtual earth nodes.
I think my fb C's are probably at least a decade too large but ....
Thanks!
I have just nipped the mistaken R's, and shot a couple of pics of the build-up. Also the schematic is now corrected for 800 Hz and no R's shunting the virtual earth nodes.
I think my fb C's are probably at least a decade too large but ....
Thanks!
- Tue Jun 18, 2013 2:29 pm
- Forum: Pro Audio Design
- Topic: Presenting "The Leslieator" - a work in progress
- Replies: 10
- Views: 26664
Re: Presenting "The Leslieator" - a work in progress
That schematic looks OK from a quick glance. OK, thanks for the check-over. I would lose the 1.3k resistors to ground on U5a and b Oops! Thanks! I was making a standard feedback configuration, not a virtual earth mixer stage configuration. Duh. My First Mixerâ„¢. Look for a wiring mistake or other er...