LINLAI SAPPHIRE 300B VACUUM TUBES
A matched pair, these are essentially new as they were only fired up once to be tested. Perfect condition.
Shuguang Dongsheng 300B tube Matched pair Lightly used GUARANTEED
Used pair does not have original box. This is for the used pair.
Western Electric 300B 1953 Single D Getter Vacuum Tube Amplitrex 97% New In Box
Up for buy it now is a new in box 1953 Western Electric single D getter vacuum tube. The tube tested 104% ip and 97% gm using an Amplitrex AT1000 tube tester (as photographed).
U.S.A Western Electric 300B triode. New in Box – B-stock (2025)
– Code 2552. Manufactured in 2025, The listed price is for one bulb. Brand new, unused, in original packaging. Original blue/white packaging. The bulbs have been tested and will be supplied with a TV7 test tube. Approximately 80 to 88 lumens. They have slightly higher anode current characteristics, but this will not reduce performance according to specifications, therefore they are rated B. – Shipping is $25 USD for standard shipping from Hanoi, Vietnam. Estimated delivery time is approximately 9 to 23 business days, or 5-7 days for an estimated $68.
Pair of 300B-98 Tubes By Shaguang, New Ratings
The underrated tubes in the market.
KR Audio 300B Matched Pair Vacuum Tubes Tested w/ Reports Made in Czech Republic
KR AUDIO 300B MATCHED PAIR (CZECH MADE). Hand-crafted in Prague, these tubes are the primary source of unyielding authority and lifelike texture in high-fidelity systems. This matched pair, complete with original provenance and recent testing data, embodies the absolute integrity that professional audiophiles demand.
