[Heath] The Heathkit IP-27

[G3OOU at aol.com]

Hi Ken
 
I looked at the IP27 schematic today and noted that it did not have a  
reverse protection diode across the regulator circuit in case the output held up 
 longer than the unregulated input supply e.g. connected to a very large  
electrolytic or a battery which would cause the regulator to be reverse 
biassed.  Most modern supplies have this type of protection. Simple to add.
 
73

Bob

Bob F Burns
C Eng,  FIET, MSE
Amateur Radio Callsign: G3OOU
Registered RSGB  Instructor
G-QRP Member No: 6907; Zone: 14, QRA: IO91WH; WAB:  TQ25
Secretary of Crystal Palace Radio & Electronics Club: _www.g3oou.co.uk_ 
(http://www.g3oou.co.uk/) 
Technical web site: _www.qsl.net/g3oou_ (http://www.qsl.net/g3oou) 
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