The Boogie Board

I've read one other post here, but the conversation went to a slightly off topic. So my question is: can I replace Mesa EL84 in the Mark V 35 with JJ EL84 without any bias problem? I'm in Italy and here we have no store that test tubes for the specific amp, so I have to buy them from Amazon as they are.

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MESA/Boogie® Mark V:35

If it were me, I'd only use Mesa power tubes to keep the warranty intact, but experiment with different preamp tube brands for tone chasing.

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Mesa Mark V35 - Mesa TC-100 - Marshall JVM410 - Marshall JVM215C - H&K Grandmeister 36 - Blackstar TVP60
Mesa 2x12 Vertical - Mesa 2x12 Horizontal - Mesa 4x12 Straight - Mesa 4x12 Slant
Dean/ESP/Gibson/Fender Guitars

Ask the seller if they can provide tubes in range that's suitable for your Boogie. Many can. Eurotubes told me they could.

I've never bought a NEW Boogie, but I would probably stay with Mesa branded for the same reason of keeping the warranty.

Having said that, I've replaced many power tubes of different brands and never had an issue and never thought about the bias.

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93 97 98 PRS CE24
94 98 G&L Legacy
94 G&L ASAT Special
95 G&L S-500
99 Peavy Wolfgang
11 Gibson LP Studio 60

69 Bandmaster Head
88 Quad Pre
91 & 92 Simul 295
92 DC-5
96 Mark IV Maple/Wicker
98 5150 combo
08 Mark IV Wide