PEARL Tube Coolers:
The 198 pg. PEARL Audio Note, “PEARL Tube Coolers and Equipment Reliability” provides both a present-day overview
and several magazine reviews as well as an extensive overview of the period literature and patents.
Little Input on Audio Output Transformers & Update:
Some basic transformer theory and specifications on PEARL's high power, ultra-wide bandwidth output transformers. The Update covers ultra-linear operation implemented with a separate screen winding and regulated, screen
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