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Love it!! Now that’s a robust bulk cap Ground connection and layout update! No more stacking multiple terminals on a single connection.

The DCA75 Pro is a very nice tester. With the USB interface and laptop, it’s a very capable portable curve tracer and analyzer.

Necessary for me for a number of reasons. Like you mentioned, I never liked large loops of wire connecting the bias circuit between the backplane and control boards (potential improvement option for Model One specific design by routing the bias signals to pin connectors). When building the...

Not sure this will be the last iteration, but I will be modifying the first amp to match.

Output offset measured +/- 0.5mV, that's 0.0005V. Outstanding... Bias set to 350mV.

Outputs installed, torqued to 4 in/lb, and confirmed isolated from chassis ground.

All initial power up testing completed successfully with power supply rail voltages of +/- 111.8 VDC.

Countersink bit used on all heat sink holes to help prevent damage to output sil-pad isolators.

It's now officially amp #0006.

Power Supply caps installed and wired with12AWG.

Power control board, speaker relay output, and AC wiring completed. Power control board wiring secured to the transformer shield with 3M tie wrap mounts.

Backplane boards wired. very straight forward as compared to the typical 700 build. Having the fuse holders next to each backplane works well for direct wiring without long bundled wires.

Fits perfectly.

That was my reaction at first. Once you see the amp in the case, it will help with confidence.

The Cabbage Case has arrived, all 35 lbs of it... Its a very robust case and should serve very well in shipping this quality amplifier without issue. I'll post pictures of the amp in the case once ready to ship. The faceplate will be located on the left side of the picture.

Mounted the auxiliary power supply transformer to the shield and terminated all primary and secondary leads of both main and aux toroids.

Placed thermal switches on the back chassis wall. Given the large tabs on this switch, it's easier to place after the mounting the backplane boards. I also placed a VERY small amount of thermal paste on the thermal switches and bias transistor mount for improved thermal transfer from back...

Interesting you mention the Tice Clock, I just came across an interesting article that discusses the topic of this thread and the clock. https://www.psaudio.com/blogs/copper/the-tice-clock-and-the-endless-search-for-the-holy-grail?srsltid=AfmBOop-wPHY5rfJ8qDxjI3pFb2exs-6Enm38qQmaVaHgGd16Mb_tUK7

Place the separate audio control boards and attach to backplane PCB's. This design has very direct and compact connections for the critical amp control boards to the backplanes, unlike loops of wire in the traditional Phase Linear configuration. Place the power control PCB, rectifier, and...

Install completed PCB assemblies on back wall. Start the heavy duty work of placing the toroid transformer.