813 SE triode amps
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845 20W A1 class monotriode amplifier under Vacuum-Tube Valves Circuits -4142- : Next.gr
813 Beam Power Tube and Data Sheets
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813 Beam Power Tube and Data Sheets
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813 Linear Amplifier by KG7TR
813 Beam Power Tube and Data Sheets
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813 / GM70 amplifier with Bartolucci transformers
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813 SE triode amps
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813 Beam Power Tube and Data Sheets
813 Beam Power Tube and Data Sheets
