Tested on our eTracer curve tracer on a full curve map. RFT ECC83 12AX7A. Date codes for RFT are difficult to pin down, but these were likely produced in the late 60’s to early 70’s. Triode #1 – Plate Current = 0.94mA Rp = 70705 Gm = 1508 Mu = 106.6 Corners = PASS.
Item Tag: RFT
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TWO RFT TELAM EL84 6BQ5 Vacuum Tubes / Germany/ Computerized Tested /Ship Fr USA
TWO RFT EL84 / 6BQ5 vacuum tubes Made in Germany tested via etracer computerized tube tester Tube 1 Test Results: 11446 gm (umhos) @ 44.01 mA plate current Tube 2 Test Results: 11979 gm (umhos) @ 57.28 mA plate current See more test resilts in pic International shipping may be via USPS, global post, or UPS
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Telefunken RFT Germany 12AT7 ECC81 Halo Getter Tube 539C & Maxi Test ANOS 🔊
No diamond logo. Closely balanced sides for gain. Hickok 539C and Digital Maxi-Preamp 2 Tested. Test results will vary between testers as it is not an exact science and all testers have their limitations.
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2- RFT 12AU7A ECC82 Vacuum Tubes Tested NOS/NIB Matched Pair Germany
These valves are of very good quality and have excellent consistency. Minimum Gm 1560.
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United Electron 12AX7 ECC83 West Germany Tube RFT TESTED
I think this is an RFT brand tube. Use your own judgement on pictures. Tested on Sencore MU140. 90 is new tube on tester. 88/89
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1x RFT-RWN ECC83/12AX7 MATCHED 1/2/3/More TEST IN PHOTO NOS Vintage Germany
RFT ECC83 (12AX7) SHORT PLATES ORIGINAL! Excellent radio tube with short anodes! Less low frequencies, more linear tube in frequencies. with huge amplification it makes less noise! Buy Only Honest Tested Tubes!