I have a "Korg era" 1993 Vox AC30TB6. I read on a forum that this amp's output transformer has an unused 8 ohm tap. Can anyone verify this? I was told the green wire terminating to the PCB is the 8 ohm wire (See photo). From the output transformer I see a black wires, one blue wire, and the green wire. There is also the thicker black wire running from the PBC to the 16 ohm jack. I assume this is a ground wire?
Does anyone know how I can add the 8 ohm tap or if this is possible? Would it be as simple as grounding the new 8 ohm output jack just as the exsisting 16 ohm one and running the green wire to the new 8 ohm jack the same way as the blue one is on the stock 16 ohm jack? I understand I could really screw up my amp if I did this wrong...
IMG_20190517_160721 by Zachary J Drummond, on Flickr
Does anyone know how I can add the 8 ohm tap or if this is possible? Would it be as simple as grounding the new 8 ohm output jack just as the exsisting 16 ohm one and running the green wire to the new 8 ohm jack the same way as the blue one is on the stock 16 ohm jack? I understand I could really screw up my amp if I did this wrong...
IMG_20190517_160721 by Zachary J Drummond, on Flickr
I´ll give you a clueDoes this point to the 8 ohm tap? What does GN mean?
G r e e N
I believe the green wire is the 8 ohm tap and is simply 'parked' on the circuit board for your convenience.Does this point to the 8 ohm tap?
Perhaps JMFahey, who is an expert in such matters, will confirm that you can remove the green wire from the board and transfer it to a new output jack as you've suggested.
Since you are 'just a guitar player', you may have no experience of working with valve amplifiers. In that case, it would be safer to leave the modification to a technician.
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