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Philips 7316 Matched Pair (12AU7) Beckman Instruments special grade tube (ultra rare!)
NOS in a white box. Ultra-rare low noise 12AU7 tubes. These are super low noise tubes with medical-grade/aircraft equipment grade and were only sold to companies. These are the large halo getter 1959 date-coded originals from Holland. These 7136 tubes are among the rarest ever by Philips from the Heerlen factory. These tubes were the Philips answer to the...
CBS 7025 Selected NOS/NIB Low Noise Balanced Tube 1961
CBS 7025 Selected NOS/NIB Low Noise Balanced Tube 1961. This is the low noise, "industrial" version of the 12AX7. It has a spiral wound filament which reduces hum and noise. This tube was specially selected for low noise and internal balance. These tubes are usually the best choice for demanding hi-fi applications. These tubes were specially selected for...
General Electric JAN GE 5687 WB Tube 60's
This NOS 1960s GE 5687WB is a military spec 5687 tube. It has black plates with copper grid posts and a halo getter. This 5687 WB tube is noted for being an excellent driver tube for push-pull amps, and also in various OTL headphone amps. They sound very good and are durable.
Brimar NOS/NIB 6057 Special Quality (12AX7/ECC83) Preamp Tube 1966
NOS/NIB low noise Brimar tube 6057 (CV4004/12AX7/ECC83) Brimar Thorn "T" England NOS narrow ribbed gray plates1960's. 6057 T is often referred to as Brimar's ultimate "Special Quality" box-plate type. Factory Code 4M6 8977 (4M6 = 1966) Halo getter.