No Varicap? Try a Schottky diode

Varactor diodes (Varicaps) along with many other exotic components which are often specifi ed in HF and RF designs are sometimes diffi cult to obtain and in some cases may even have gone out of production. Not very encouraging if you had been planning to build a design that we featured in an earlier edition of Elektor. Anyone finding themselves in this situation may be surprised to learn that help may be on hand from an unexpected source…