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POT33 High Frequency Transformer Vertical BobbinPOT33/19 ferrite core bobbin. 5+5 pins POT33 DIP coil former. Bobbin Size=37.0mmX25.0mmX16.7mm. Pin pitch=4.0mm. Parallel distance=33.5mm, Pin pitch=5.0. POT33/19 phenolic transformer bobbin. Manufacture final POT33 electronic transformers.