PC board foil layout in PDF format. Print your transfer with this. Parts stuffing diagram in GIF format. Not to scale. Parts stuffing diagram in PDF format.
Parts list in plain text format.
Transistors Q1,2,3 and 4 must be heatsunk. Insulators should be used, or two separate heatsinks isolated from each other and the rest of the world. Note that Q1 and Q3 are grouped together and share common collectors and can share a heatsink. The same is true for Q2 and Q4. Operation over 3khz will lead to higher losses.