Component selection

Be careful on component selection for the following areas. My store BOM reflect the following result so I would advise to change the parts ordered for these following areas for a smaller component equivalent.

There is a resistor on the opAmps that need to be smaller in length so that it doesn’t stand too high when mounted. As you can see, I had to angle the tall resistor and also angle the way the top opAmp sits.

This area here needs to have smaller component dimensions so that they sit in nicely.

VTB9046 transformer

I used a nut and washer to allow the bolt supplied with the EQN kit to fit with mounting the VTB9046 transformer to the board. An alternative method instead of cutting the bolt shorter to fit. The nut I used as a spacer was slightly bigger (3M I think) than the EQN bolt which allowed it to just slide down the bolt into position but not too big that it would slip right through the bolt head.

Pot wiring

Soldering the pot wiring to the board circled in green on the pic can get a little tricky once all the components are in place. I should have soldered three loose wires into place first here before soldering the components around it. Then solder the pot to the loose wires last.

Pins for grayhill switches

Thanks to JBVries. What a valuable pic and instruction!

Quote author=JBVries

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Just to make things a little easier on future builders. Make sure you have the flat part of the shaft opposite position 2 and drop pins in these locations….

12 and 6
12 and 8
12 and 5
12 and 5

Left to right…

_{Sourced: i11.photobucket.com/albums/a174/mrmizuno1/EQN-pins2.jpg}

If this is incorrect please give a shout so I can take this down but I’m pretty sure it’s right.