• 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.

Ef86, 6H30PI and 2 EL34

Because more tube is equal more money and in Brazil tubes are very expensive.

dynaco ST70 is very cool projet, but I have a Willkasom project run with Ef86, ECC83s and 2 EL34 and now I want replace Ecc83s with 6h30p, because I would like learn how to ¨H30p work, its a new tube for me.
Is it possible? and I benefit with the exchange?

Regards,
João Martins