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Old 26th Jan 2021, 11:32 am   #1
LA9CHA Thorvald
Join Date: Dec 2019
Location: Egersund, Norway
Posts: 108
Default HP8640B amp 08640-67003

Looking for information regarding the difference between U1 and U2, ( 0864-67003 and 0864-67002). I have seen that the U2 has been made up and replaced by a MAV11 based amp, and wonder U1 can be made similar way?
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