So.
My Blackstar combo has two EL84's, that will wear out/ need replacing, "sooner or later".
I've already spotted the bias variable resistor, and also the "bias balance" variable resistor- that lets one balance the bias between the two output tubes.
...I want to do the future tube change myself, and also the biasing. (I'm confident it will be OK), but reading about the "balance" resistor got me curious-
Somewhere, on a tube amp forum- someone wrote- that "having two output tubes running with different bias, ("unbalanced") may contribute to a richer, or considered more desired sound from the amplifier.
:o
I'll read up on where to "draw the line" of high and low biasing- but... is there anything to this? My first thought was, that the pair of EL84's should be both bought balanced, and also biased with exactly the same voltage/current.
Thanks.
(and my second question. My combo amp, has a jack plug, going from the "speaker out" section on the back of the amp, to the speaker. I'm afraid this will come loose, or I'll mistake the cord for i.e. the footswitch cable, and then ruin my amp. Is there any way to "semi-permanently" fix this? I'm thinking gaffa tape. I might have answered my own question right now . Sorry.)
-Erlend .
My Blackstar combo has two EL84's, that will wear out/ need replacing, "sooner or later".
I've already spotted the bias variable resistor, and also the "bias balance" variable resistor- that lets one balance the bias between the two output tubes.
...I want to do the future tube change myself, and also the biasing. (I'm confident it will be OK), but reading about the "balance" resistor got me curious-
Somewhere, on a tube amp forum- someone wrote- that "having two output tubes running with different bias, ("unbalanced") may contribute to a richer, or considered more desired sound from the amplifier.
:o
I'll read up on where to "draw the line" of high and low biasing- but... is there anything to this? My first thought was, that the pair of EL84's should be both bought balanced, and also biased with exactly the same voltage/current.
Thanks.
(and my second question. My combo amp, has a jack plug, going from the "speaker out" section on the back of the amp, to the speaker. I'm afraid this will come loose, or I'll mistake the cord for i.e. the footswitch cable, and then ruin my amp. Is there any way to "semi-permanently" fix this? I'm thinking gaffa tape. I might have answered my own question right now . Sorry.)
-Erlend .
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