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).
- 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.
This 300B tube features an anode made of WE-style "moldy plate" material, a black bakelite base with nickel-plated pins, and a classic, elegant design. About Tube Matching.
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.