From a larger lot of RCA / Conn tubes mostly from the 50s/60s. Tube are matched by Gm. Power tubes like the 6L6 are tested only with the 686 which includes plate current (Ip), shorts and gas tests.
Item Tag: RCA
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NOS NIB Matched Quad RCA 12SN7GTA Audio Tubes 1969
Great for any audio amplifier. These tubes are what audiophile enthusiasts are looking for. Th ese tubes were tested in my Military Hickok Cardmatic to make sure these were great. All the tests were excellent, within 4%.
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7591 RCA VACUUM TUBES QUAD TEST NOS
Tested on a Heathkit TT1, minimum good tube is 6600 µmhos and NOS tubes tested at 10200 µmhos. Also tested on a Hickok 539c. We are here to help!
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quad rca/amperex jan 810 tube lot , continuity tested good
Vintage lot of 4 jan rca amperex 810 tubes . Unable to test them as i dont have a tube tester for these tubes. Only test was for continuity and all for tested good. That being said These are sold as is , no returns for parts or repair only. Buyer pays flat shipping $35 usa/canada
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RCA 7868 7591A 7591 EL506 Black Plates Super Rare Tested NOS Matched Quad
These tube can be use to substitute 7591 with adapter sockets which bring you stunning sounding quality. That’s the fact. The price is not included sockets. They sound wonderful in my hifi system.
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50 Year Old Vacuum Tubes | 4 7091A’s | 4 7025’s | 2 6GH8A’s & 1 6C4
And finally, one CBS tube in an RCA box. It is a 6C4. Then there are 2 RCA 7025’s. There are eleven tubes all together! He died a couple of years ago, and I discovered this box of 50 year old tubes.
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Vintage RCA 7591A Vacuum Tube | NOS | Black Plate | Made in USA | Rare Hi-Fi…
This is a premium vintage RCA 7591A power pentode, highly sought after for the legendary Fisher 500C, 800C, and McIntosh amplifiers. Condition: Beautiful New Old Stock (NOS) appearance. Crystal clear glass with a strong mirror-like getter. Design: Features the superior Black Plate construction. Testing: Visual inspection only; sold untested/as-is. This is a high-value piece of audio history. It will be professionally packed, double-boxed, and insured for shipping.
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RCA 7591A Pre owned vacuum tube
The RCA 7591A vacuum tube is a pre-owned vintage audio component that belongs to the category of vintage electronics. Manufactured by RCA, this vacuum tube is a specific model known for its quality and performance in vintage audio systems. With its unique design and brand heritage, the RCA 7591A tube is sought after by audiophiles and collectors looking to restore or enhance their vintage audio setups with a touch of nostalgia and authenticity.
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ONE NEW RCA 7591A Tubes / Amplitrex Tested STRONG 💪 +100% / Oct 1968
ONE RCA 7591A vacuum tube. Tested on Amplitrex AT-1000 tube tester (fixed bias mode). CE date code = October 1968. +100% plate current test results. Tube 1: 11520 micromhos @ 76.2mA plate current emissions.