P2P Tweedle Dee - OT Mixup

[Thisismyname]

So I originally started this project a year ago by purchasing a Pacific OT for a brownface Deluxe build.

Somewhere between then and a few months ago when I started buying parts, I misremembering that and believed I had been building a 5E3 Deluxe all along.

So the only thing that actually matters is that I just realized I have a brownface OT with a 8K primary instead of the tweed with a 12K primary.

In my limited experience regarding transformers, I'm somewhat confident this should be fine, but what effects could I expect with this mismatch?

[JPK]

So if it's an 8 ohm secondary run a 4 ohm speaker to raise primary reflected impedance? Something like that. You can adjust the mismatch of the primary at the secondary, inversely if I remember correctly. Or just get the right OT.

[sluckey]

So the only thing that actually matters is that I just realized I have a brownface OT with a 8K primary instead of the tweed with a 12K primary.

Not a problem. Carry on. I've never seen a 5E3 OT spec'ed for 12K. Why do you say that?

[Thisismyname]

So the only thing that actually matters is that I just realized I have a brownface OT with a 8K primary instead of the tweed with a 12K primary.

Not a problem. Carry on. I've never seen a 5E3 OT spec'ed for 12K. Why do you say that?

It's what the Pacific spec sheet says.

[roarshock]

I'm no expert, but I've never seen a 5E3 OT with 12k CT.  You may want to contact pacific to see if it is a typo.  I've certainly read trheads with people using 6.6k and 8k. I hope everything works out for ya!

[punkykatt]

Do a turns ratio test to see what it actually is.

[pdf64]

The Hammond 5E3 spec OT differs to the Pacific, 8k5
https://www.hammfg.com/files/parts/pdf/1750EP.pdf

[PRR]

12k would suit p-p 6K6 at 10W. Maybe Leo found some 6K6 iron surplus at a great price?

The "20W" could be 10W at 50Hz and 20W at 70.7Hz same THD. (Guitar vs full-range.)

Usually speaker and tweed-color make more difference than impedance.

[pdf64]

There’s a thread over at TAG where the unusual transformer specs chosen by Pacific is commented on https://ampgarage.com/forum/viewtopic.php?p=435348#p435348