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ampex: Ampex stereo amp Mod.-ID = 127920

Martin Renz Ernst Erb Vincent de Franco Martin Bösch Mark Hippenstiel Bernhard Nagel Dietmar Rudolph † 6.1.22 Otmar Jung Heribert Jung Eilert Menke 
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Forum » Radios and other type of sets (Physics) etc. » MODELS DISPLAYED » ampex: Ampex stereo amp Mod.-ID = 127920
Jeff Droll
Jeff Droll
USA  Articles: 2
Schem.: 0
Pict.: 8
06.Jul.09 03:26

Count of Thanks: 7
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I have the full factory service manual for my Ampex console unit. As soon as I can get it scanned  I'll forward it.

I also replaced the original 6973 tubes with 6GC5's. This required that the original power supply voltage doubler be converted to a full wave bridge. This slightly lowered the output power but cleaned the sound up incredibly. It also has extended the tube life 10 times.

Those changes are noted in the schematic