Slug tuned crystal radio
WebbThe sensitivity of a good crystal set is about 500µV for minimum discernable signal. A big issue is lack of selectivity. Various improvements are possible using full wave bridge detectors and antenna matching circuits together with the use of high Q tuned circuits optimally coupled to the detector and antenna. WebbThe system consists of two slug-tuned coils on the same frequency. The first of these coils is capacity coupled to the second which in turn is connected to the grid of the second mixer V-5. L-23, a 5. 7 MC trap is connected between the two coils to remove a spurious response that occurs at 3. 533 MC. VFO AND SECOND MIXER
Slug tuned crystal radio
Did you know?
WebbThe variable capacitor has large inter-meshing plates that are subject to mechanical damage or vibration and is physically a large component (size matters). The range of … Webb29 sep. 2024 · They were slug tuned with a fixed cap across the coil and some came with antenna wire only while other models had ground wires too. ... The crystal radio earphone is inserted into the ear canal making a tight seal so that the smallest sound wave can be heard. I have been using Aliexpress in China to buy small low value electronic items.
WebbCrystals & Oscillators; Fixed Resistors; Photoresistors (LDR) Potentiometers & Variable Resistors; Thermistors; ... 12 Pcs VARIABLE RF INDUCTORS COILS SHIELDED 01009 PCB MOUNT Radio Repair Ham CB. $7.95. $5.30 shipping. or Best Offer. ... RCA SERVICE PARTS NEW NOS NIB 224174 USE AS SLUG-TUNED COIL FORM. $4.49. $5.59 shipping. …
WebbThese radios are tuned with a ferrite slug that is driven by a clever rack and pinion mechanism. These radios are styled to look like transistor radios of their day. They are … WebbThe slug is held inside the tube by wax and if you are careful and apply slow, even pressure, the slug will move to where you want it. I now had a crystal radio put together as it should be and it worked -- sort of. Below is the schematic diagram I developed for the little radio. I'm kind of big on schematic diagrams, but I wasn't always so.
WebbAnswer (1 of 3): In a superheterodyne receiver the bandpass filtering of the unwanted signals is performed by the tunable RF filter and the Intermediate Frequency (IF) filter. Since the IF filter is a fixed bandpass filter, it has a much tighter passband than the tunable circuit. This allows a ve...
WebbAug 30, 2024 - Amateur Radio - VU2NAN - Nandu. Homebrew antennas, receivers, transmitters, test equipment, concepts, circuits, photos, operation and troubleshooting. csis ufshttp://www.oldheadphones.com/crystal/info/heath.htm eagle hollow haunts eagle neWebbThis page gives the circuit and pictoral description of the famous Heathkit CR-1 crystal radio. It was a double tuned crystal radio from the 1950's with a series tuned primary … eagle home building centreWebbA 10K resistor was then added to terminate the filter and the response squared up (as shown by curve "B") to give a passable 1 kc high-frequency filter. Fig. 7. Measured attenuation curves of a half-lattice filter using two nominal 5645 kc crystals having series-resonant frequencies separated by 560 cycles. csi substitution formWebbThe slug-tuned tank coil was adjusted for maximum signal on the scope. The fine frequency adjustment trimmer capacitor was set to within 1 Hertz using a frequency counter. Afterwards, the counter was tested and accurate at zero beating WWV at 10 MHz. The calibrators are very useful with both tube and transistor analog tuned radios. eagle home appliances customer carehttp://www.oldheadphones.com/crystal/info/heath.htm eagle hollow hauntWebb30 aug. 2024 · Tuned circuit The aerial and earth are connected across a parallel tuned circuit. The purpose of this is to select the wanted station. A simple crystal set will not have good selectivity so if two strong signals … csis understanding the russian military today