Output Transformer Help Please

[B-Rex]

I'm working on a Robinette JCM 800 build with with the option for 6V6, 5881, 6L6 and EL34. The design uses two output jacks (8 & 16Ohm) to adjust for the different output tubes.

I'm trying to salvage parts from an 67 Ampeg GoldenGlo III and the output transformer has 2 green and 2 black leads. When paired black to green both are reading .5 which would have to be 8 Ohm considering the original amp.

Can these be wired for 8 & 16 Ohm output jacks?

[SEL49]

Can these be wired for 8 & 16 Ohm output jacks?

No. The two greens are tied together, and the two blacks are tied together. There is only one 8Ω secondary winding and no taps. Looks like this...

[pdf64]

What's the resistance between the green wires, and between the black wires?
Probably either a short or open circuit.

[B-Rex]

Green and black pairs are both reading about 0, open I guess?

Thanks for the responses!

[pdf64]

Green and black pairs are both reading about 0, open I guess?

Thanks for the responses!

What does your meter read when the probe tips touch together?
What does it read when attempting to measure the resistance of fresh air?

[B-Rex]

There is no reading without some contact. The leads together are similar to the green and black pairs - drifting a little around 0

[HotBluePlates]

Green and black pairs are both reading about 0, open I guess?

What does your meter read when the probe tips touch together?
What does it read when attempting to measure the resistance of fresh air?

There is no reading without some contact. The leads together are similar to the green and black pairs - drifting a little around 0

pdf64 was trying to get you to notice for yourself that the two Gren wires must be connected (Zero ohms), and the two Black wires must be connected (Zero ohms).  Whether or not you connect them externally, they are still connected internally.

This is not a multi-tap output transformer:  8Ω only.