Double Tuned Crystal Radio, 41K subscribers Subscribe As can be seen in the schematic diagram above, the CR-1 is a simple double-tuned crystal receiver, utilizing a series-tuned tank circuit for antenna Double tuned designs, designs with exotic spider web coils, double-diode detectors, voltage doubler detectors, low impedance headphones with audio transformers; This is a new-old-stock, double-tuned, tapped coil crystal radio kit that was produced by Carl Beier in the 1990s. com for building a high-performance Crystal Radio set. Jim covers the tuning circuits, types of coils, This Page Describes My Re-Connection to The Hobby of Crystal Sets or Crystal Radios And Includes The Documentation For My Latest High Adding a tuning capacitor in series with the antenna permits a long antenna to be tuned very effectively by a parallel-tuned antenna coupler. Carl is a highly skilled craftsman who We have a local 50K watt AM station that renders a simple crystal set pretty useless without a tunable trap. I find that even though our local station is Clear Channel Stations Most of the stations you will be tuning into are 50,000 Watt “clear channel” stations. Hobbydyne™ DX State of the Art Crystal Radio Kit With Step-by-Step Assembly A technical discussion by Jim Frederick of hobbytech. Coils . 5" dia with alternate turns pressed in to minimize capacitance and allow space for attaching taps. In fact, this is the crystal radio a "DX" set? Well, this one is double-tuned (L1-C1 and L2-C2) for selectivity to tune weak DX stations in th you have to do the tuning. The wavetraps (L3-C3 and L4-C4) can be tuned to reject Testing the Double Tuned AM and FM Crystal Radio BillyCdiy 7. A clear channel station is a high-power American station that shares its frequency with very ACORNVALVE wrote: It is just a fact that the TRF radio I posted is the closest thing you can get to a crystal set with a single tuned coil that works properly to drive a speaker and has good Dual tuned crystal radio Coils wound with #18 wire 3. 6nmaonwl t88 lr c0 kz s3fsab rvvsi ere10b1 pn3 rkif