Search found 4679 matches

by mediatechnology
Mon May 26, 2008 1:28 am
Forum: Document
Topic: 2SB737 Datasheet
Replies: 0
Views: 7631

2SB737 Datasheet

by mediatechnology
Mon May 26, 2008 1:09 am
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 264
Views: 381222

Mid Side M-S Matrix Uses No Precision Resistors

This precision sum difference matrix for M-S mid side uses the 0.005% matched internal resistors of the THAT1240. It encodes or decodes depending on how you define the inputs and outputs. Update December 3, 2018. For a modern implementation of the precision MS matrix see: https://www.proaudiodesign...
by mediatechnology
Mon May 26, 2008 12:44 am
Forum: Pro Audio Design
Topic: Level Detectors, Absolute Value, Peak and RMS
Replies: 35
Views: 82342

Level Detectors, Absolute Value, Peak and RMS

This is a collection in pictures. I'll add text later. https://www.ka-electronics.com/images/Rectifiers/Absolute_Value_Mancini.JPG "Absolute Value Circuit Delivers High Bandwidth," Ron Mancini, EDN, July 2004. https://www.ka-electronics.com/images/Rectifiers/Absolute_Value_AD536.jpg Analog Devices A...
by mediatechnology
Mon May 26, 2008 12:10 am
Forum: Pro Audio Design
Topic: A Matrix-Based Pan Pot With Variable Width
Replies: 2
Views: 10523

A Matrix-Based Pan Pot With Variable Width

This one uses a sum-difference matrix using the THAT1240. It is not a constant power panner but is instead constant voltage mono sum. It's pretty smooth. An interesting thing is that the insert can be used to introduce a frequency or time-dependent element while a perfect mono sum is still maintaine...
by mediatechnology
Sun May 25, 2008 11:56 pm
Forum: Document
Topic: Solid State Logic SSL E-Series Schematics
Replies: 0
Views: 5855

Solid State Logic SSL E-Series Schematics

This is a web page with links to many of the early 4K and 6K 82E-series module schematics:

https://www.ka-electronics.com/images/S ... _index.htm
by mediatechnology
Sun May 25, 2008 11:40 pm
Forum: Pro Audio Design
Topic: Benchmark Mic Preamp from 1984 - Active Preamp History
Replies: 39
Views: 75627

Benchmark Mic Preamp from 1984 - Active Preamp History

This thread title exists elsewhere both in the Documents section and cyberspace. It's actually morphed into a history of the active mic preamp. In March of 1984 I visited Al Burdick of Benchmark Audio in his garage in Garland, Texas. Al gave me a hand-sketched drawing of a preamp he had been workin...
by mediatechnology
Sun May 25, 2008 11:28 pm
Forum: Pro Audio Design
Topic: Power Supply Filter Calculations
Replies: 0
Views: 9143

Power Supply Filter Calculations

We often get the question "how large of a filter cap do I need?" Here's a way to calculate it: https://www.ka-electronics.com/Images/jpg/Ripple_Calculations.jpg The load resistance term, Rl, can be estimated from the average voltage (at a hypothetical regulator input) divided by the maximum expected...