A2 Ultrapath Audio Tube Theory

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Electra-Print.com 211 A2 Amplifer

https://www.electra-print.com/211a2.php

211 A2 Amplifier 211 tube amplifiers have always delivered a nominal 12 to 20 watts in Class A operation and gained acceptance for this service. As a means to deliver more power from the 211 tube, we at Electra-Print Audio have updated the traditional design using Class A2 operation delivering easily over 40 watts due to higher swing high ...

Fixed Bias v Ultrapath | diyAudio

https://www.diyaudio.com/community/threads/fixed-bias-v-ultrapath.110797/

The ultrapath caps I've seen in most of the schematics give a fairly high cut off - sometimes around 20Hz or so - at least higher than I see for cathode bypass. With a power supply that has significant impedance behind the ultrapath cap - for instance, the one shown with a resistor - it seems the cap could act a bit like a boostrap.

The Tube CAD Journal: E-Mail, UltraPath

https://www.tubecad.com/april_may2001/page41.html

From GlassWare the publishers of tube audio design software. The Tube CAD Journal: E-Mail, UltraPath Once the grid voltage is known, it is divided by the idle current and the result is the cathode resistor value.

Ultrapath bp Preamp - High-End Audio Discussion Forum

https://forum.audiogon.com/discussions/ultrapath-bp-preamp

The Ultrapath is a real good unit, and battery power only enhances things. He is doing some cutting edge stuff, and his Direct Reactance Drive amps are very cool too. He is also a real nice guy, and we went out to dinner with some friends and had a real good time.

Electra-Print.com Push-Pull A2 6A3/300B

https://www.electra-print.com/pushpull_a2.php

Printer Friendly Push-Pull A2 6A3/300B. This amp has great specs, produces twice the power from your favorite tube and is simple to build. But you will need to decide which power transformer to use, both have identical performance but one runs cooler than the other because of the laminations.

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