Orange 86 Build Thread - no PCBs for sale

[Bobby Baird]

If I’m understanding this correctly, according to this Orange 86 schematic I know I connect the secondary as Green to 2 and Grey to 1 on the PCB, then if I want to experiment with the center tap further I’d solder Violet (1:7 with the 34.5% tap) between the junction of R-Z and C-Z? As a side note, they’ve been adjusted to the suggested 470pf and 10k for the Sowter.

Yes, I believe green would be 2 which feeds to the grid of V1 through RL1. Grey to 1 gets grounded because it's a single-ended circuit as opposed to a deferential circuit. Violet would be a tap for probably a 3.5:1 ratio similar to the Cinemag CM-9661A. I would try the white wire to junction of R-Z & C-Z and adjust suggested Zobel, or leave unattached.

 

[MidnightArrakis]

For those who have used the Sowter 9970/9980 combo, are the center taps left unterminated on the 9970 (orange, violet, and white), and secondaries on the 9980 wired in parallel (tie blue and brown, and yellow and white)? The sparse documentation from Sowter apparently expects me to be more knowledgeable than I am haha. Thanks!

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>> SOWTER 9970 -- 3D CAD-model shown below:

>> Other popular audio transformers used within GroupDIY projects:






>> By the way.....can you provide me with either the mechanical dimensions or either an -- IGS -- or a -- STP -- file of this bracket of yours?:



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