[GreenKeys] Loop power transformers $5

[Ken Schwieker]

Just a heads up on a source of very reasonabily priced transformers 
suitable for loop supplies.
Can be used to construct a supply with a somewhat lower and safer 
voltage than the usual 140 volt or higher ones.
Did some tests, primary at 120 v;
74 v ac no load
70 v ac with 100 ohm load (700 ma)
One hour with 100 ohm load connecter, transformer temp 110 F (ambient 
about 70 F).
Size,  3" x 2 1/2" x 2 1/2" high not counting chassis mounting tabs. 
Mounting holes 3 1/2" between centers.
Only two terminals on the bottom (pri) and three on the top (center 
tapped secondary) are used.
I purchased 3 and the total was around $25 including shipping

Ken S

http://www.apexelectronic.com/TR5-W-26