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3CPX1500A7Penta Laboratories3CPX1500A7 High-mu power triode
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4CX1500BPenta Laboratories4CX1500B/8660 Radial beam tetrod
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3CX3000A7Penta Laboratories3CX3000A7 Power triode
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3CPX800A7Penta Laboratories3CPX800A7 Power triode
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4CX350APenta Laboratories8321/4CX350A Radial beam tetrode
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3CX15,000A7Penta Laboratories3CX15,000A7 Power triode
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4CX15,000APenta LaboratoriesPL8281/4CX15,000A Power tetrode
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4CX250BPenta Laboratories4CX250B RADIAL BEAM TETRODE
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4CX7500APenta Laboratories4CX7500A Radial beam power tetro