White Oak Audio Design - Model ONE 1000 Watt Stereo Amplifier
- Thread starter mlucitt
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- Halfbiass...Electron Herder and Backass Woof
I cannot say enough for the assistance and passion from Joe and Mark to help me restore my Blaze400s2 to a PhaseLinear! This old girl (Built by Pat) was a blaze400 at the StonePoney in Asbury Park NJ in 82’ when I (swapped it for a Dynaco400 on a Saturday night) first fixed it the left outputs, 40yrs later - now powered by White Oak - and good for the next 40! Thank you Joe and Mark! Merry Christmas.
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I have been remiss on not posting my progress of the WOA Model ONE assembly. There have been some delays caused by identifying better parts, changes to the documentation and the Wire Run List, but I am making progress.
The picture below shows the IEC Power Inlet. It looks like the Shield Wire is perilously close to the Fuse Holder, it is not. It is wrapped around the Ground Wire. The Ground Wire is connected to a pressed-in stud in the chassis. I chose a shielded Power Wire, but the run is only about 6".
This picture shows the same Backplane Boards as used in the PL700 with the exception of Pin Headers instead of Phoenix connectors.
Standard PL700 Backplane Hardware is also used. You can also see the Balanced Input XLR connector is pre-wired. Due to the close proximity of the Transformer Cover to the back wall of the Chassis, all connectors should be pre-wired before installation.
This was my mock-up "fit test" of the Backplane Boards and the Output Relay Board. Note that the Thermostatic Switches have large Faston terminals. This means the Backplane Boards are installed first, then the Thermostatic Switches go in afterwards.
When installing the Transformer, I tightened down the Holding Bolt finger tight, then added a turn with a wrench to compress the rubber pads lightly. Install the smaller 25VA Toroid on the outside of the Transformer Cover, then install the Transformer Cover onto the Chassis. The center-back washers and nut are real fun to install, ask me how I know...
The amplifier is now ready for the Backplane Boards. The Transformers and Transformer Cover have to be installed before the Backplane Boards because. Just because.
The Backplane Boards are simply resting in place so I can verify the length of each wire. The Red and Black Wires of the Dual Primary 1.5KVA Transformer come out of the rear and the Secondary Windings come out of the front of the Transformer Cover. The Yellow and Brown Secondary Wires will be trimmed and pushed back into the Transformer Cover because they are not used, but they may be used in the future.
I used a couple of 2x4 blocks to tilt the amplifier on the cart to install the Backplane Boards. This keeps the Nylon spacers from falling out.
The WOA 1000C (Classic) Amplifier Boards are installed next. One of the screws is a little tricky to install. Note how the Backplane Board Pin Headers fit into the Phoenix connectors perfectly.
The threads in the pressed-in nuts are so precise that the screws need to be carefully aligned to start the threads. Much better than sheet metal screws...
The picture below shows the IEC Power Inlet. It looks like the Shield Wire is perilously close to the Fuse Holder, it is not. It is wrapped around the Ground Wire. The Ground Wire is connected to a pressed-in stud in the chassis. I chose a shielded Power Wire, but the run is only about 6".
This picture shows the same Backplane Boards as used in the PL700 with the exception of Pin Headers instead of Phoenix connectors.
Standard PL700 Backplane Hardware is also used. You can also see the Balanced Input XLR connector is pre-wired. Due to the close proximity of the Transformer Cover to the back wall of the Chassis, all connectors should be pre-wired before installation.
This was my mock-up "fit test" of the Backplane Boards and the Output Relay Board. Note that the Thermostatic Switches have large Faston terminals. This means the Backplane Boards are installed first, then the Thermostatic Switches go in afterwards.
When installing the Transformer, I tightened down the Holding Bolt finger tight, then added a turn with a wrench to compress the rubber pads lightly. Install the smaller 25VA Toroid on the outside of the Transformer Cover, then install the Transformer Cover onto the Chassis. The center-back washers and nut are real fun to install, ask me how I know...
The amplifier is now ready for the Backplane Boards. The Transformers and Transformer Cover have to be installed before the Backplane Boards because. Just because.
The Backplane Boards are simply resting in place so I can verify the length of each wire. The Red and Black Wires of the Dual Primary 1.5KVA Transformer come out of the rear and the Secondary Windings come out of the front of the Transformer Cover. The Yellow and Brown Secondary Wires will be trimmed and pushed back into the Transformer Cover because they are not used, but they may be used in the future.
I used a couple of 2x4 blocks to tilt the amplifier on the cart to install the Backplane Boards. This keeps the Nylon spacers from falling out.
The WOA 1000C (Classic) Amplifier Boards are installed next. One of the screws is a little tricky to install. Note how the Backplane Board Pin Headers fit into the Phoenix connectors perfectly.
The threads in the pressed-in nuts are so precise that the screws need to be carefully aligned to start the threads. Much better than sheet metal screws...
- Joined
- Jan 14, 2011
- Messages
- 74,814
- Location
- Gillette, Wyo.
- Tagline
- Halfbiass...Electron Herder and Backass Woof
The slide show link shows some of the barrier strip wiring details near the end. It shows how the caps are wired in and the grounds are connected.
Model ONE Step by Step slide show
Model ONE Step by Step slide show
Last edited:
- Joined
- Jan 14, 2011
- Messages
- 74,814
- Location
- Gillette, Wyo.
- Tagline
- Halfbiass...Electron Herder and Backass Woof
