EDN

RF Fundamentals: What actually creates the 90 degree coupler phase shift? Part 1

Part 2 addresses coupling factor, signal propagation delay, maximum coupling, and vector analysis. Part 3 covers the derivation of parameters, including S parameters, and conclusions derived from this ...
MusicRadar

MXR shrinks the Phase 90 to become the Phase 95 mini phaser pedal

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. We've seen a number of mini takes on MXR's classic Phase 90 circuit, so it makes sense for the ...
MusicRadar

In praise of: MXR Phase 90

In 1971, high-school chums Keith Barr and Terry Sherwood opened an audio-repair business in New York, and after fixing their fair share of busted pedals, reckoned they could do a better job. A few ...
Forbes

How the FDA Stifles New Cures, Part II: 90% of Clinical Trial Costs are Incurred in Phase III

Yesterday, the Manhattan Institute released a study I authored, entitled “Stifling New Cures: The True Cost of Lengthy Clinical Drug Trials.” (You can read the full report here.) The paper discusses ...
Guitar World on MSN

“It was too good to keep to ourselves”: MXR gives Eddie Van Halen’s favorite orange box the golden touch with its 50th Anniversary Phase 90

NAMM 2025: No need to be hunched over the Klondike, sieve in hand, scraping around in the sub-zero mud – there’s now an ...
EDN

RF Fundamentals: What actually creates the 90 degree coupler phase shift? Part 2

The term ζ is the coupling factor and is equal to the magnitude of the maximum coupling between the lines. The maximum coupling is written as maximum coupling = ζdB = 20Log(ζ) for BL = π/2. With ...