Antique high-placed regenerator made with tube 24, Vacuum Tube Radio
Keywords: homemade electronic tube radio, tube radio circuit
Below, only the high-placed regenerator who did the No. 24 tube is done under the guidance of the steamed popsicles. The steamed popsicles have introduced this 1929-sized pipe. Do this only adds a high level The purpose of the regenerator is to further do two high places, or regenerate to accumulate a little experience. This regenerator has used three 24th testers, respectively, with high places, regenerates and low. Due to more than one level tuning The whole machine is better than the general regeneration machine. You can receive some other fields that have not been received. It is still worth it. The key to the high-placed regeneration machine is the mask of the coil or The position is placed. The tone is also more troubles. The coil does not add mask or mutual position, which will cause self-excitement. The tone is not adjusted, the whole machine sensitivity will be lower than the general regeneration machine. However, synchronization of the two levels One but adjust, the sensitivity of the whole machine will be much better than only the regeneration part. In the production of the principle of doing less, I found a 300P x 2 old double, on the circle paper First, let the regeneration part work. Then correct the number of coils to cover the entire medium wave range. Then use capacitors to carefully correct the double-linked maximum and minimum capacity, try to make it. Finally around a high release Level input coil. The parameters of this coil and the parameters of the regenerative coil are exactly the same. The coupling between the high grade level and regenerative detection level is the prime minister's plan, put the high level level 10MH load choke in the regeneration coil. Among the cylinders. The screen cap is hard to find, just find the base of the two glass fuses, one cut as two, can distribute the field. The bottom plate is a wooden board, and the following uses four rubber circles instead "Feet". The panel is a black plastic board. It is easy to process. The terminal is demolished from the old instrument. Hey, the poor is a poor game. The next is assembly. In order to avoid shackles, let two coils The axis is vertical, and the two ends of the bottom plate are separated. When high gradation level, in both one of them, one 4-30P fine-tuning capacitance. The two levels can be synchronized by careful adjustment capacity. Which one is It is tested. After the high frequency part is adjusted, plus the level of low places is to raise your hand. In this way, a simple radio that can be tall and a speaker is made. By the way, make a simple radio, The choke is a problem, it is difficult to buy, it is not easy to DIY. After using the hand in stock, you will naturally start to find solutions. For a single tube, due to the high-resistance headset, The circle is saved. For the low-placed regenerator, the classic circuit is used. I checked the old. 1881. Radio. 1882., There is no need. The friend of the workers produced in 1955 is useless. I am here I only tried it with a self-made machine of No. 24, and there is no difference. It is saved. There is also the high-frequency bypass capacitor that is together. It has no effect on the volume, why bother to waste silver two. Pay Circuit for the friend of the upper work, for reference. Thank you!
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