[ARC5] Sandy Coolness for Our BAs

David Stinson arc5 at ix.netcom.com
Fri May 12 20:27:33 EDT 2017


New devices that make reviving our loved radios
simplier and less expensive are appearing regularly.
The mass marketing of large LCD and Plasma
TVs have birthed some pretty cool devices.
Just found this honey today, an NTE1743. 

https://goo.gl/photos/iXzL1SaXKNczYTQi7

The little wonder was soooo expensive: $9 ;-)
It's a high-voltage regulator similar to the little
LM317 things for low voltage, but this one
takes DC under 200V peak and delivers
135 V +/- 0.8V; just right for "reduced B+"
projects.  NTE1776, 1777, 1778, 1743
deliver 120, 130, and 135 Volts fixed,
good for an Amp (if you can source that much).
Originally designed to follow the AC-line-
bridge rectifier-regulator architecture.
I'm going to use it with a transformer.

So I'm building what is, I think, going 
to be the easiest regulated receiver supply
ever.  B+/Fil transformer, bridge rectifier,
47 uFd filter cap and the regulator.
Should work a treat and be rock stable.
Will let ya know.

73 DE Dave AB5S



More information about the ARC5 mailing list