6L6 G Zenith Sylvania Tube Black Plate Chrome Glass TV7 Test Good SY-20
6L6 G Zenith Sylvania 진공관 블랙 플레이트 크롬 글래스 TV7 테스트 완료 SY-20
| 상품번호 | 398158946454 |
| 상태 | Used |
| 거래유형 | 즉시구매 |
| 출고국 | 미국 (US) |
이베이 판매가
$25
약 36,850원
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상품 설명
Zenith 6L6 G Tube. Made in USA.
- Manufactured by Sylvania
- TV7 7D/U Tested Good: 30/ 25 Baseline.
- Chrome Bottom
- Black Plate
Testing & Condition
- Minimum reading: 65% (per original 25 baseline; military standard).
- Tubes test NOS and meet or exceed published GM data.
- All tubes tested for gas, shorts, transconductance, and emissions.
- TV-7 tested (calibrated, military-standard tester).
About NOS & Testing
- NOS tubes fall within the GM range published in the RCA Receiving Tube Manual; variation above/below average is normal.
- No universal test result defines NOS. Typically, NOS tubes measure between average and maximum micromhos.
- Different testers (even identical models) may produce different readings.
- 100% meter readings are not required—passing = meeting spec range or minimum (TV-7: ~65%).