• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Tube ID

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Can any out there id this tube? And, can you recommend a use SET/PP? I acquired these at a flee-market. I also have other tubes. loads of 12AX7 and some 12AU7 and some 12AT7 and of course a few 6SN7 But back to this..... this tube has the following writing RCA 68-43 and has six pins surrounding a bakolite center.
The next is a Majestic 80 What ever that means. Reads like it is a good tube. It has 4 pins much like a 300B or 2A3 has.
 

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