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changing rectifier tubes in a deluxe reverb ri-GZ34 to 5R4


if changing rectifier tubes in a deluxe reverb from the GZ34 to a 5R4 for more sag what else do I need to do other than taking the GZ34 out and putting the 5R4 in? I'm a newb to amp electronics and there really isn't an amp tech in the area...thanks!

Blue Strat

You can just pop it in and play, but for the maximum sag effect you'll need to rebias. You'll either need a tech or a bias probe (Compu Bias, Amp Head, etc).

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