Winding super reverb output transformer.

[R.G.]

I was under the impression that once Fender dropped Triad OTs with the end of the tweed line that interleaved OTs where a thing of the passed?

First off, I have no knowledge about when which amplifier maker dropped interleaving, so you may well be correct.

I do know that some of the most-revered early amps used either off-the-shelf hifi OTs or custom copies.

But once sales volumes came up and MBAs started their insidious crawl into amp makers, the fact that winding OTs with interleaving takes much more labor and more-skilled labor than single-section transformers, interleaving rapidly exited. I specified a 3-2 interleave for the Workhorse amps, and was told that it took one skilled transformer winder one day to make one transformer. Higher automation could improve that some, of course, but still, it's more expensive.

I'm not surprised that once guitar amp makers found that not interleaving didn't lose customers, they went for single sector OTs as fast as ever their little accounting departments could carry them.

[pdf64]

I was under the impression that once Fender dropped Triad OTs with the end of the tweed line that interleaved OTs where a thing of the passed?

My understanding is that as a general guideline for BF etc amps, the OTs with a '2 hole' mounting (Champ, Princeton, Deluxe, Pro/Tremolux/Vibrolux) are simple non-interleaved, whereas the '4 hole' mounting larger types (SR, TR etc) are interleaved.
That would seem to correlate with @tube65 's Pro OT and @tubewell 's SR OT dissections.

[sagitt]

Has anyone tried to wind this output transformer and wants to share information,
number of windings, thickness of the wire?

[tubeswell]

Has anyone tried to wind this output transformer and wants to share information,
number of windings, thickness of the wire?

I recently got a Schumacher OT rewound for a 67 Super Reverb - 4 primary and 3 secondary interleavings (my winding guy told me - after having meticulously unwound it so he could wind it again meticulously). 4k2:2R 50W

[Stevem]

I thought that when Fender stopped using Triad for OTs that interleaving was dropped by the wayside?