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Hi all, very new to tube swapping so doing a load of reading. I have a MkV:25 which has a 12AX7 in V6/Driver/Phase Inverter spot. Have any of you guys any opinions/joys/horror stories with replacing the 12AX7 with a 12AT7 in the V6 spot? Just looking for some guidance before I splash out on...

Just got my new Mk V25...love it...BUT... Ch1 on Clean is silent...great. Ch1 on Fat is silent...great. Ch1 on Crunch....HUM....not great. Ch2 on IIC...not so silent....OK Ch2 on IV...not so silent...OK Ch2 on Extreme...not so silent...OK The only one I have A problem with is Ch1 on...

Can you guys tell me/point me in the right direction of how I would go to change preamp tubes...where would be the best place to start with taking per-installed tubes out for replacement. I have a Mk5-25 and am thinking of replacing tubes. It's pretty cramped in back of Mk5-25 for my...

Hi folks, a newbie to the forum. I have just ordered a MK5-25 and I have the option of buying a 1x12 Thiele Cab or a Transatlantic 1x12 open back 23' wide cab. Both cabs have Black Shadow C90 speaker in them. These cabs are a fair distance from where I live so can't really try before I buy.Can...