Hi ! I have some tube questions :
1) The tubes of my 1990's Marshall JCM900 need to be changed. I never did it by myself before but I would really like to try. I could be dangerous (I know a soundtech who got once shocked). Is it OK if the amp have not been used for one or two days ?
2) Currently I have JJ EL34 and the three pre-amp tubes, all made in Slovakia and changed by a shop in 2016.
The sound is crackling horribly if I boost the clean channel "A" with a some powerfull vintage booster (Sola Sound Colorsound PowerBoost but even with the pedal gain at 9 o'clock if you really hit with the pick). Is that the power tubes of the pre-amp ? I change first the 4 EL34 and see ? Or the other way round ?
3) I am an dummy for amp circuitry : does both channels uses the 7 tubes ? I suppose so but am I wrong ?
4) And lastly, the most important question : Any recommendation ? For me the JJ EL34 sound was OK when new. Mullar are expensive and I share the studio with a band that will always crank the master twice a week ... (They emulate Messhuggah). And I'm myself also guilty as I add a MXR 10-band EQ in the loop. So maybe I should avoid deluxe/pricey tubes... But this is also my recording amp.
So any nice sounding tubes robust enough to hold their course ?
1) The tubes of my 1990's Marshall JCM900 need to be changed. I never did it by myself before but I would really like to try. I could be dangerous (I know a soundtech who got once shocked). Is it OK if the amp have not been used for one or two days ?
2) Currently I have JJ EL34 and the three pre-amp tubes, all made in Slovakia and changed by a shop in 2016.
The sound is crackling horribly if I boost the clean channel "A" with a some powerfull vintage booster (Sola Sound Colorsound PowerBoost but even with the pedal gain at 9 o'clock if you really hit with the pick). Is that the power tubes of the pre-amp ? I change first the 4 EL34 and see ? Or the other way round ?
3) I am an dummy for amp circuitry : does both channels uses the 7 tubes ? I suppose so but am I wrong ?
4) And lastly, the most important question : Any recommendation ? For me the JJ EL34 sound was OK when new. Mullar are expensive and I share the studio with a band that will always crank the master twice a week ... (They emulate Messhuggah). And I'm myself also guilty as I add a MXR 10-band EQ in the loop. So maybe I should avoid deluxe/pricey tubes... But this is also my recording amp.
So any nice sounding tubes robust enough to hold their course ?
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