33s30b

OldSound

B65 OSRAM MARCONI VALVE 33S30B 5692 QA2408 13D2 CV1988 ORIGINAL UK RARE DOUBLE TRIODE AUDIO PREAMPLIFIER 92% OK OldSound €349 17% Jun 23, 2025

OldSound

A2408 B65 OSRAM MARCONI VALVE 33S30B 5692 13D2 CV1988 ORIGINAL UK RARE DOUBLE TRIODE AUDIO PREAMPLIFIER 91% OK OldSound €449 36% Jun 23, 2025

OldSound

6SN7GT SYLVANIA JAN CHS 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE AUDIO PREAMPLIFIER OldSound €109 Sep 1, 2023

OldSound

6SN7GTB RCA TUBE PAIR 33S30B 5692 B65 13D2 CV1988 DOUBLE TRIODE AUDIO PREAMPLIFIER "BLACK PLATE" NOS/NIB OldSound €319 10% Oct 3, 2024

OldSound

6SN7GTB RCA TUBE PAIR 33S30B 5692 B65 13D2 CV1988 DOUBLE TRIODE AUDIO PREAMPLIFIER "BLACK PLATE" NOS/NIB OldSound €319 10% Oct 3, 2024

OldSound

6SN7GT RCA VALVE PAIR 33S30B 5692 B65 13D2 CV1988 DOUBLE TRIODE AUDIO PREAMPLIFIER "GRAPHITED GLASS" NOS/NIB OldSound €495 Dec 3, 2025

OldSound

6SN7GT SYLVANIA JAN CHS 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE AUDIO PREAMPLIFIER OldSound €144 4% Sep 1, 2023

OldSound

6SN7GTB RCA TUBE PAIR 33S30B 5692 B65 13D2 CV1988 DOUBLE TRIODE AUDIO PREAMPLIFIER "BLACK PLATE" NOS/NIB OldSound €299 Sep 19, 2025

OldSound

6SN7GT FIVRE 33S30B 5692 B65 13D2 CV1988 VALVE PAIR DOUBLE TRIODE AUDIO PREAMPLIFIER SUPER SOUND NOS/NIB OldSound €369 4% Sep 1, 2023

OldSound

6SN7GT RCA VALVE PAIR 33S30B 5692 B65 13D2 CV1988 DOUBLE TRIODE AUDIO PREAMPLIFIER "GRAPHITED GLASS" NOS/NIB OldSound €495 211% Sep 1, 2023

OldSound

6SN7GT SYLVANIA JAN CHS 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE AUDIO PREAMPLIFIER OldSound €109 8% Sep 1, 2023

OldSound

6SN7GT FIVRE 33S30B 5692 B65 13D2 CV1988 VALVE PAIR DOUBLE TRIODE AUDIO PREAMPLIFIER SUPER SOUND NOS/NIB OldSound €394 Sep 23, 2025

OldSound

6SN7GT VT-231 RAYTHEON 33S30B 5692 B65 13D2 CV1988 ECC32 QUARTETTO VALVOLE DOPPIO TRIODO PREAMPLIFICATORE 100% OK OldSound €499 0% Sep 1, 2023

OldSound

6SN7GT MARCONI 33S30B 5692 B65 13D2 CV1988 ITALIA "ORIGINAL" DOUBLE TRIODE VALVE SUPER SOUND NOS/NIB AUDIO PREAMPLIFIER OldSound €199 45% Sep 1, 2023

OldSound

6SN7GT MARCONI 33S30B 5692 B65 13D2 CV1988 ITALIA "ORIGINAL" DOUBLE TRIODE VALVE SUPER SOUND AUDIO PREAMPLIFIER 100% OK OldSound €94 36% Sep 1, 2023

OldSound

6SN7GT FIVRE 33S30B 5692 B65 13D2 CV1988 VALVE PAIR DOUBLE TRIODE PREAMPLIFIER AUDIO HIGH QUALITY SOUND NOS/NIB OldSound €841 50% Nov 17, 2023

OldSound

6SN7GT BRIMAR BVA 33S30B 5692 B65 13D2 CV1988 MADE in ENGLAND DOUBLE TRIODE VALVE AUDIO PREAMPLIFIER - RARE - 100% OK OldSound €237 5% Jan 12, 2024

OldSound

5692 RCA 33S30B 6SN7GT B65 13D2 CV1988 ECC32 CEI VALVE DOUBLE TRIODE AUDIO PREAMPLIFIER HIGH QUALITY NOS/NIB OldSound €279 8% Sep 1, 2023

OldSound

6SN7GT MARCONI SPA 33S30B 5692 B65 13D2 CV1988 ITALY COUPLE VALVE DOUBLE TRIODE AUDIO PREAMPLIFIER SUPER SOUND 100% OK OldSound €264 41% Sep 1, 2023

OldSound

6SN7GT BRIMAR BVA 33S30B 5692 B65 13D2 CV1988 MADE in ENGLAND DOUBLE TRIODE VALVE AUDIO PREAMPLIFIER - RARE - 100% OK OldSound €149 Sep 1, 2023

OldSound

6SN7GT FIVRE VALVE 33S30B 5692 B65 13D2 CV1988 DOUBLE TRIODE PREAMPLIFIER PAIR "BAKELITE BASE" AUDIO SUPER SOUND 100% OK OldSound €309 Sep 23, 2025

OldSound

6SN7GT SICTE S.I.C.T.E. VALVE VT-231 33S30B 5962 B65 13D2 CV1988 DOUBLE TRIODE AUDIO PREAMPLIFIER 100% OldSound €79 Sep 1, 2023

OldSound

5692 RCA 33S30B 6SN7GT B65 13D2 CV1988 ECC32 UNITED ELECTRONIC VALVE DOUBLE TRIODE AUDIO PREAMPLIFIER HIGH QUALITY NOS/NIB OldSound €269 Sep 1, 2023

OldSound

6SN7GT BRIMAR BVA -TUNGSRAM- PAIR OF VALVE 33S30B 5692 B65 13D2 CV1988 MADE ENGLAND DOUBLE TRIODE AUDIO PREAMPLIFIER 100%OK OldSound €320 25% Jan 11, 2024

OldSound

6SN7GT MARCONI SPA 33S30B 5692 B65 13D2 CV1988 ITALY PAIR OF VALVE DOUBLE TRIODE AUDIO PREAMPLIFIER SUPER SOUND 100% OK OldSound €279 35% Sep 1, 2023

OldSound

6SN7GT BRIMAR BVA STC 33S30B 5692 B65 13D2 CV1988 MADE in ENGLAND DOUBLE TRIODE VALVE AUDIO PREAMPLIFIER - RARE - 100% OK OldSound €404 10% Jan 12, 2024

OldSound

VT-231 SYLVANIA 6SN7GT 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE PREAMPLIFIER "RARE" AUDIO NOS/NIB OldSound €419 7% Sep 1, 2023

OldSound

6SN7GT MARCONI SpA VALVE 33S30B 5692 B65 13D2 CV1988 ITALY ORIGINAL DOUBLE TRIODE AUDIO PREAMPLIFIER SUPER SOUND 100% OK OldSound €149 Jan 12, 2024

OldSound

VT-231 KEN-RAD 6SN7GT 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE PREAMPLIFIER "RARE" AUDIO NOS/NIB OldSound €489 24% Sep 1, 2023

OldSound

VT-231 KEN-RAD 6SN7GT 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE PREAMPLIFIER "RARE" AUDIO 100% OK OldSound €429 27% Sep 1, 2023

OldSound

6SN7GT SICTE S.I.C.T.E. VT-231 33S30B 5962 B65 13D2 CV1988 VALVE PAIR DOUBLE TRIODE AUDIO PREAMPLIFIER 100% OldSound €99 Sep 1, 2023

OldSound

6SN7GT SICTE S.I.C.T.E. VT-231 33S30B 5962 B65 13D2 CV1988 VALVE DOUBLE TRIODE AUDIO PREAMPLIFIER NOS/NIB OldSound €159 Sep 1, 2023

OldSound

5692 RCA 33S30B 6SN7GT B65 13D2 CV1988 ECC32 VALVE PAIR UNITED ELECTRONIC DOUBLE TRIODE AUDIO PREAMPLIFIER HIGH QUALITY NOS/NIB OldSound €559 5% Sep 1, 2023

OldSound

6SN7 GT ARCTURUS (TUNG-SOL) 33S30B 5692 B65 13D2 CV1988 ECC32 VALVE PAIR DOUBLE TRIODE TOP SOUND AUDIO PREAMPLIFIER 100% OK OldSound €359 18% Sep 1, 2023

OldSound

VT-231 KEN-RAD 6SN7GT 33S30B 5692 B65 13D2 CV1988 ECC32 PAIR OF DOUBLE TRIODE VALVE PREAMPLIFIER "RARE" AUDIO 100% OK OldSound €439 6% Jan 12, 2024