orion 2250,2100,Concept 97 modd issues - diyAudio
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Old 12th August 2008, 05:26 PM   #1
amc32 is offline amc32  United States
diyAudio Member
Join Date: Mar 2008
Default orion 2250,2100,Concept 97 modd issues

I readily know that all 3 amps are based on the same design.And that the power supply issues exist trying to go from a high current power supply design to a high voltage design.I am trying to modd a 2250sx to a high current design (2100HCCA or Concept 97). Any info would be helpfull.
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Old 12th August 2008, 08:04 PM   #2
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
Transformer ratio

Zener diodes for power supply regulation

Resistors near center of audio section 220 ohms >> 150 ohms

The 97.3 is rated to go down to low impedances but the one I worked on had rail voltage similar to that of a 2250. At low impedances, it would have failed very quickly.
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