output jack impedance..

[diddymix]

Hi folks,

I was hoping somebody with some knowledge could help me figure something out.. I have made modifications to my amplifier and had a speaker and cab built.. and am about to test it... only I have a slight dilemma and dont want to fry my new speaker or output transformer (dont know which would be the one to go!) if i got it wrong.
Basically I installed the new output transformer, and I know the output impedances for each lead as theyre colour coded on the classictone datasheet. The thing I need to figure out is this switch on the pcb on my amplifier, the transformer leads just plug onto the PBC, only I don't know which leads go to which side of the switch which are (W2) and (W3) on the attached schematic... So I know which leads are which, but I dont know which output jack the 8 ohm feeds, and the 16ohm feeds. Its really confusing because on the schematic it looks like both sides of the switch just equally share the output over both jack sockets (JS6) and (JS7).

Help Im very confused!! Am I right in saying the 8ohm lead will feed only one socket at 8ohms?? I am feeding an 8ohm speaker and am I right in saying putting the 16ohm output into it could cause damage?

MAny thanks for reading and look forward to your advice!

[sluckey]

The speaker jacks are connected in parallel. If one is 8Ω then the other is also 8Ω. If one is 16Ω then the other is also 16Ω. The selector switch is in complete control and will connect either the 8Ω OT tap or the 16Ω tap to the two parallel jacks.

[diddymix]

Sluckey thanks!! Sorry i was being a dummy, I realised that whatever I connect to the switch IS the impedance of the secondary wire.. massive facepalm lol

[sluckey]

W2 is 8, W3 is 16, and W4 is common. So connect your OT leads accordingly.