Power Amp Development Over The Years Copyright © August 2021, Rod Elliott

[Bob-23]

An article of Rod Ellott's on his great ESP treasure-trove that may be of interest for some ASR-readers.

Content

• Introduction
• 1.0 Williamson/ Mullard (Valve)
• 2.0 Early Transistor Designs
• 3.0 Mullard 10-10
• 4.0 El-Cheapo
• 5.0 RCA High-Quality 10W
• 6.0 Armstrong 600
• 7.0 Sansui AU-101/ NAD 3020
• 8.0 Sinclair, Including Z30/ Z50
• 9.0 Thick-Film Hybrids
• 10.0 Power Amp ICs
• 11.0 A (Relatively) Modern Discrete Power Amp
• 12.0 Generalised Discrete Power Amp
• 13.0 Class-D Power Amps
• Conclusions
• References

Power Amp Development

ESP - Power amplifier development over the years.

sound-au.com

 

[pma]

I would add topologies by Erno Borbely and Bob Cordell, both brought progress in circuit design.

 

[Phorize]

Very interesting. As an aside Sir Clive Sinclair passed away on the 16th of this month.

 

[ad_fletch]

Wow so good to see ESP is still going. I dabbled with RE’s DIY designs as a penniless young audio enthusiast in the late 90s….