![]() ![]() The loopstick pick up coil usually bridges from the bias resistors to the base of the mixer/oscillator transistor - you have to restore its DC path after ripping out the loopstick. Throwing out the loopstick doesn't help gain much - I'd add a JFET source follower input stage and a short wire whip antenna. ![]() then you only have to adjust the local oscillator to shift the wanted signal to the intermediate frequency. These manufacturers offer models that can receive voice modes (SSB, AM, FM) used by ham radio operators on HF, VHF and UHF amateur radio frequency bands and, of course, the many other broadcasting stations on other HF bands. If its a not very crowded band you're after, you might get away with getting rid of the tuning tank circuit altogether. Each has a model that could be considered 'best all band radio receiver' among portables. Cheap Handheld All Band Ham Radio Receiver Rx-606AC, Find Details and Price about Factory Direct Sale China Radio from Cheap Handheld All Band Ham Radio. Most sets are super heterodyne that have a local oscillator which would also need adjusting. this receiver has picked up AM radio stations, FM stations. Just replace the tuned-circuit with the 10k and 100 pF as in the above schematic. With a TRF or regen radio you need only take a few turns off the tuning coil to increase the frequency. The Amazing All-Band Receiver is basically a diode detector followed by a high-gain audio. You don't even need to take the back off the radio. The LW, MW and SW band cover the range from 0.2 to 30 MHz. ![]() Click to expand.Dickcappels nailed it with the converter idea, its just an oscillator that radiates a low level signal to beat with your wanted signal - you arrange for sum or difference heterodyne frequency to land where your radio can find it. This product is the all band radio for you to use in your dailylife or used in your spare time study, with the audio bandwidth filter and frequency step. ![]()
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