IRF-510 replaces VN66AFD

The VN66AFD is no longer in production and is now only available at exorbitant prices. We have therefore replaced it with the International Rectifier IRF-510 which can be used in the Advanced Null Steering Circuit without any other circuit change required. The IRF-510 has a higher dissipation rating and will improve performance a tad, while providing a respectable cost saving over the VN66AFD. NOTE however, that the pinout is different as shown in the diagram to the left. Please disconnect your null steerer from your antenna during electrical storms to avoid zorching the IRF-510.