One ore machine completed three days ----- Crystal Radio

Three days to complete a crystal radio, Crystal radio Keywords: three days to complete a crystal radio Three days to complete a crystal radio Look combined image (1) Structure: master foremost three knobs: the left is a variable 365pf air, is tuned with a vintage intermediate mineral splitters machine, there are eight lugs, with switching the tuning coil eight taps, and the detector to obtain the input impedance, the maximum detection output. 365pf right air is a variable, for adjusting the resonant frequency of the frame-shaped coil. is a cylindrical coil diameter 46mm, length 120mm glass tube do (substantially corresponding to the hollow coil, almost no loss of electromagnetic waves). the above strand with 0.09 * 32 magnet wire wound antenna coil tuning coil immediately, with no voids tuning coil winding 100 turns of 20 turns from start to end of the tap, a pump head 10 for each turn, pumping a total of 8 heads in the future to the splitter. 40 turns about the antenna coil, 20 turns, a suction head 30 turns a. the splitter activity to the trailing end of the main contact ore, corresponding to an anode of the diode. frame antenna above three arm length are 600mm, 650mm arm length is below. grow out for fixing the base portion in which the above three arms have opened lower groove 18, while the lower arm 19 to open the slot when wound, from below by the arms near the middle of the start winding groove, with 0.09 * 42 shares enameled wire geese a total of around 18 turns 1/4 turn, is fixed to the end of the arm below the last off the assembly line slot. activity ore is my homemade (production methods previously posted messages) relatively large head, very nice. the transformer is back for matching purposes and horn speaker, the speaker is 5W8 Europe. multiplying the first pressure detector connected in the form of the test, and then connected to a half-wave rectifier and a full wave comparison, I did not feel any difference. in order to obtain a final utility For best results, the one of the parallel 2AP9 and activities may be changed each other ores;.. designed two outputs, with a high impedance headphone, the other terminal on the left side behind the master to the transformer (impedance matching. device) primary, secondary horn speaker connected to two output terminals, with each of the respective detection devices, each with a respective filter capacitor transformer is made of the original power transformer primary to the secondary is 220V 10V * 2, bis line and wound, 220V flanked to the detection output terminal, the second horn to the horn, the horn is uniform European 5W8 1mm thick enameled wires each connected (2) effects: in the secure environment quiet, not external antenna connection, then only a ground wire (I was connected to the heating device within the .4m can be heard, and very clear. connect an external antenna (I was connected to the cable shield online), 5m within all heard the sounds. very efficient. this is one of my finest creations