Search found 3102 matches

by mediatechnology
Thu Aug 16, 2018 6:29 pm
Forum: Pro Audio Design
Topic: control circuitry for THAT 2162
Replies: 12
Views: 109

Re: control circuitry for THAT 2162

What matters from a control viewpoint (maximum attenuation) is the voltage. From that perspective the divider reference can be either ground or Vcc/2 as long as you calculate the divider with the correct end-point voltage. If you have other things that reference Vcc/2, like the VCA, op amps etc., th...
by mediatechnology
Thu Aug 16, 2018 5:45 pm
Forum: Pro Audio Design
Topic: control circuitry for THAT 2162
Replies: 12
Views: 109

Re: control circuitry for THAT 2162

Yes, just use Vcc as Vin to the divider and set the divider output to whatever maximum attenuation you want.
Then buffer that divider with another op amp.
I would use Vcc/2 as the reference for the lower end of the divider.
by mediatechnology
Thu Aug 16, 2018 5:29 pm
Forum: Pro Audio Design
Topic: control circuitry for THAT 2162
Replies: 12
Views: 109

Re: control circuitry for THAT 2162

Yes, use a second op amp to drive the lower end of the pot. You don't need R5 - a voltage divider at the input of the lower op amp will set the potential of the end stop. You can then bow it by resistors from one end stop to the wiper. Also C4 can be connected to ground rather than Vcc/2. Functional...
by mediatechnology
Thu Aug 16, 2018 1:47 pm
Forum: Pro Audio Design
Topic: control circuitry for THAT 2162
Replies: 12
Views: 109

Re: control circuitry for THAT 2162

Make the lower end of P2 fed from a low-impedance voltage source. (Op amp output.)
(The upper end of P2 should continue to be a voltage source as well.)
by mediatechnology
Wed Aug 15, 2018 8:51 pm
Forum: Pro Audio Design
Topic: control circuitry for THAT 2162
Replies: 12
Views: 109

Re: control circuitry for THAT 2162

Thanks for joining us! Have a look here and see if this is useful "Resistors Provide Nonlinear Pot Tapers," Mark Rumreich EDN November 13 1986. : http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=12&t=866#p10260 Though the VCA control taper is linear dB I can see how some range expansion ...
by mediatechnology
Wed Aug 15, 2018 11:03 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 525
Views: 228468

Re: Entropy

I take these for leg cramps: http://www.hylands.com/products/hylands-leg-cramps I asked the Mexican tree guy - who can scamper up an Eastern Red Cedar with complete ease - what he uses: He drinks goat's milk. I do eat bananas and used to use GatorAid though I've tried to stay off that for the last y...
by mediatechnology
Wed Aug 15, 2018 7:30 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 525
Views: 228468

Re: Entropy

The trunk is kind of hollow from ants eating the insides of tree, so I may start a fire inside the base of the trunk to finish it off, when I get down to it... Throw a bag of sugar on it and wait. The sugar will feed everything and it will breakdown faster. Managing a load line by yourself is diffi...
by mediatechnology
Mon Aug 13, 2018 7:09 pm
Forum: The Peabody Lounge
Topic: Entropy
Replies: 525
Views: 228468

Re: Entropy

I got smacked the same way with a small twig a few years ago. You might want to get some of those leg cramp pills. They do help. Cramps are one of my frequent problems particularly if I'm working on a hill, dragging brush up the hill, or are having to work in an area where I don't have good solid fo...
by mediatechnology
Sat Aug 11, 2018 8:05 pm
Forum: Pro Audio Design
Topic: A Super-Simple LED Peak Flasher Audio Overload Clipping Indicator Using the TL431
Replies: 18
Views: 2292

Re: A Super-Simple LED Peak Flasher Audio Overload Clipping Indicator Using the TL431

Hey Guys, two things: 1. Seems like TLV431 vs TL431 has a Vref of only 1.25 vs 2.5V. Very confusing eh? 2. Some simulation models "generate" Vref if the Kathode voltage is less than Vref. Strange false behavior! OK, 3. Similar devices (~LT1009) look the same but are not programmable except for a fe...
by mediatechnology
Sat Aug 11, 2018 11:52 am
Forum: The Peabody Lounge
Topic: Entropy
Replies: 525
Views: 228468

Re: Entropy

JR - You predicted the eminent demise of that pecan tree just a week or so ago. Your aerial power drop was the first think I saw and thought "what a lucky break." That was too close for comfort. A new service entry would be a big huge hassle. You've got some good smoking wood for the barbecue. Paul ...