1760J OT for Blues Jr.

[roseblood11]

The Fender Blues Jr. has an output transformer with a 7000 ohm primary and a 8 ohm speaker.

As I want to use it as a practice amp for bass, I plan to install a bigger transformer with a 4000 ohm primary and 4, 8 and 16 ohm secondaries. It was used in a Carvin amp with 4*EL84, and I think it's more or less identical to the Hammond 1760J.

Should I connect the 8 ohm speaker to the 4 ohm tap?

[Ronquest]

Yes. 

[WimWalther]

And after you pull the stock OT, you can sell or swap it to some guy who needs an OT for his 30s-40s Zenith console radio! ;-)

[roseblood11]

I'll pull a Heyboer OT that will be used in a 5e3 build. The Fender OT is long gone...