The board may be used in as AVU shown in Fig. 1 or as in Fig. 2 ‘with a transformer rated from 1.5 VA to 12 VA. When used with a very small transformer, it is possible to cut off the part marked K2—K4. Place the terminal strips in the same position along the new edge as they were original.
When non-short-circuit-proof transformers are used, a fuse in the mains entry plug is essential.
K1 = two-way terminal block. pitch 7.5 mm
K2, K3, K4 = two-way terminal block, pitch 5 mm
Tr = transformer for PCB mounting PCB Ref. 934004