Hammond 125ESE wiring ?

[worth]

For this single-ended transformer there are two primary wires , one blue , one brown. Which wire goes to the B+ , and which goes to pin 3 of the output tube ?

[bobmegantz]

First, make sure that those are the primary leads - I had a Hammond SE xformer that had multiple primary taps and 2 secondary wires, where you chose the primary taps for the desired output impedance (or am I tripping?).

If they are indeed the primary leads, it doesn't matter, except the phase will switch.  If you're using NFB, you need to wire it so that the feedback phase is correct.

[worth]

Yes.. those are the primary leads. I DO have negative feedback, ( 5F2A) , that's why I'm asking.

[phsyconoodler]

Blue goes to pin 3 of the power tube.

[VMS]

In my amp brown wire goes to pin 3 of the power tube.

Test before you cut those wires too short.

[RicharD]

Either way will work.  Depends on if you want the transformer to invert or not.  With NFB, if the amp squeals, reverse them.

[sluckey]

Yes.. those are the primary leads. I DO have negative feedback, ( 5F2A) , that's why I'm asking.

Just temporarily connect it and be prepared to swap leads if negative feedback is wrong.

[RicharD]

CRAP ALERT!

Stay off the hammond mfg website.  I just got bombarded with dirty cookies when I went to check the wiring diagram.

[worth]

I was hoping to avoid the annoying squeel.... but I guess I'll just have to temporarily connect the leads.