Niiranen Posted August 19, 2022 Posted August 19, 2022 Hi Has anyone tried a tube roll on this Amp ?? Quote
King Tut Posted August 19, 2022 Posted August 19, 2022 1 hour ago, Niiranen said: Hi Has anyone tried a tube roll on this Amp ?? What’s a tube roll? Quote
Muzz Posted August 19, 2022 Posted August 19, 2022 1 hour ago, King Tut said: What’s a tube roll? Substituting different preamp tubes in order to change the characteristics of the amp; 12AU7 for 12AX7, Tungsol for JJ, that sort of thing. 1 1 Quote
Niiranen Posted August 19, 2022 Author Posted August 19, 2022 1 hour ago, Muzz said: Substituting different preamp tubes in order to change the characteristics of the amp; 12AU7 for 12AX7, Tungsol for JJ, that sort of thing. Yes , correctly .... (N)OS / new .... I have had the Amp a week now ... Have a gig tomorrow , so have not tried yet ... Quote
King Tut Posted August 19, 2022 Posted August 19, 2022 3 hours ago, Niiranen said: Yes , correctly .... (N)OS / new .... I have had the Amp a week now ... Have a gig tomorrow , so have not tried yet ... There’s three tubes in there iirc Quote
King Tut Posted August 19, 2022 Posted August 19, 2022 I’ll be gigging mine in a couple of hours at the New Day festival. Been stuck on the bloody M25 for ages! Quote
JapanAxe Posted August 19, 2022 Posted August 19, 2022 I would be wary of fitting a 12AU7 in place of a 12AX7 as the former ñ draw a lot more current, which can fry your anode resistor. Quote
BassmanPaul Posted August 19, 2022 Posted August 19, 2022 (edited) That's not true in my experience. The 12AU7/ECC82 has a smaller amplification factor, µ, and has a greater anode dissipation but cannot draw more power replacing a 12AX7/ECC83. Edited September 16, 2022 by BassmanPaul 1 Quote
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