AMB Sigma 78 and Sigma 79
Aug 4, 2016 at 4:46 AM Thread Starter Post #1 of 3

MisterX

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Has anybody noticed the new boards from AMB Labs?
 
http://www.amb.org/audio/sigma78_sigma79/
 
 σ78 ("sigma 78") and σ79 ("sigma 79") are DC voltage regulators designed as high-performance replacements for the common 78xx/79xx, LM340/LM320 and LM2940/LM2990 series of 3-terminal IC voltage regulators.* In most cases, a direct swap is possible due to physical, heatsink and pin compatibility. σ78 is a positive voltage regulator, just like the 78xx series, whereas the σ79 is a negative voltage regulator like the 79xx. σ7x offers much lower noise and other improved performance attributes.

 
Cool stuff. :)
 
 
 

 
Aug 5, 2016 at 2:29 AM Post #2 of 3

amb

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If you have gear that uses the 78xx and/or 79xx series voltage regulator in TO-220 packages, and ultra low noise and high PSRR are important, then it is a candidate for upgrading to the σ78 /σ79.

σ78 and σ79 (as supplied with regulator chip pre-soldered):
s78_s79_photo.jpg


A fully-populated σ78 (minus the pins):
sigma78_photo.jpg


Comparison of a blank and populated σ78 vs. a 78xx TO-220 regulator:
sigma78_003_photo1.jpg


Comparison of a blank and populated σ78 vs. a US $0.25 coin:
sigma78_003_photo2.jpg


Please read the σ78 and σ79 development thread.
 

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