I've been looking into some 2 meter HAM Antenna tuners to tune/match my scanner antenna. Some DIY designs incorporate two connectors, a multi selectable switch, a tapped coil inductor, and an air variable capacitor.
I'm thinking of building one, but air variable capacitor's are hard to come by these day's (Not a lot of old radios in the trash around where I live), so my question is this: "Is an 'air variable capacitor' the only type of variable capacitor that can be used, or can other type's be used as well?
Keep in mind, this tuner would only be used for receive only!
I'm thinking of building one, but air variable capacitor's are hard to come by these day's (Not a lot of old radios in the trash around where I live), so my question is this: "Is an 'air variable capacitor' the only type of variable capacitor that can be used, or can other type's be used as well?
Keep in mind, this tuner would only be used for receive only!