Valvola - tube 35W4 NOS Tungsram con scatola Eq. HY90 35R1 | eBay
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35W4 SYLVANIA Half-Wave Rectifier Single-Diode Vintage Miniature Vacuum Tube 7-Pin NOS New Old Stock in Box
35W4 Half Wave High Vacuum Rectifier Tube. Use in line-operated equipment having series-connected heaters. MFR: GE, RCA, Sylvania, Westinghouse. SKU: 35W4. New old stock. No longer available for export.