The pair tube seems to be made of RFT due to its 6CA7 compatible sphere structure. Measured value 48/46 (rejected value 30) with white box ※The pair is determined based on the gM value measured by the test machine TV-7 (Kojima Yosuke)
Accessories: white box
The pair tube seems to be made of RFT due to its 6CA7 compatible sphere structure. Measured value 44/44 (rejected value 30) lettering with replacement box is missing ※The pair is determined based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
The pair tube seems to be made of RFT due to its 6CA7 compatible sphere structure. Measured value 42/40 (rejected value 30) lettering with replacement box is missing ※The pair is determined based on the gM value measured with the test machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Pair tube, subthermal beam tube, made in China, seems to have been used in the company's power amplifiers, etc. Measured value 68/66 (rejected value 44) with replacement box*The pair is determined based on the gM value measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: replacement box
Pair tube, subthermal beam tube, made in China, seems to have been used in the company's power amplifiers, etc. Measured value 66/64 (rejected value 44) with replacement box*Pairs are determined based on gM values measured by the testing machine TV-7 (Kojima Yosuke)
Accessories: replacement box