9/9/2023 0 Comments Diy tv antenna preamplifier![]() 8-DIP machined IC socket allows to swap OPA2134 with many other dual opamp chips such as OPA2132, OPA2227, OPA2228, dual OPA132, OPA627, etc. Unlike other ESR Meters that only measure ESR value this one measures capacitor's ESR value as well as its capacitance all at the same time.Īudiophile headphone amplifier kit includes high quality audio grade components such as Burr Brown OPA2134 opamp, ALPS volume control potentiometer, Ti TLE2426 rail splitter, Ultra-Low ESR 220uF/25V Panasonic FM filtering capacitors, High quality WIMA input and decoupling capacitors and Vishay Dale resistors. It is an irreplaceable tool for troubleshooting and repairing electronic equipment by determining performance and health of electrolytic capacitors. It also analyzes transistor's characteristics such as voltage and gain. Out of curiosity, I might try to build one like the example for my Channel 11 to prove or disprove the theory.ESR Meter / Capacitance / Inductance / Transistor Tester KitĮSR Meter kit is an amazing multimeter that measures ESR values, capacitance (100pF - 20,000uF), inductance, resistance (0.1 Ohm - 20 MOhm), tests many different types of transistors such as NPN, PNP, FETs, MOSFETs, Thyristors, SCRs, Triacs and many types of diodes. It's your antenna, so you are free to wire it any way you want to wire it. ![]() Two stacked halfwave folded dipoles with a reflector will give you about the same gain as 4 stacked halfwave dipoles without a reflector about 6 dB. You can not wire your 4 halfwave dipoles together like the fullwave dipoles in a UHF bowtie antenna and expect it to work properly. Do I criss cross the wiring like lacing a shoe, do like the UHF antenna I mentioned, or some other setup? So I am making four of them, all for channel 10. I may be way off because this is all new to me, but If one folded dipole is good, four must better. The only channel I have trouble with is 10, which is real 10. All the searching I have done, the only example of how to wire the elements together were for a UHF antenna like that one.Īlthough all but one of of my local channels are UHF, I have no trouble catching them all with a simple dipole (except one UHF channel that I am not really worried about). I was using the 4 bowtie UHF as an example of wiring an antenna. I'm sorry, I didn't explain my self well. The bowtie antenna is derived from the collinear array, The bowties instead of the straight elements gives greater bandwidth. If you want to use the bowtie design, it would need to be TWICE as wide. The example is two stacked halfwave folded dipoles. You have departed considerably from the example I posted. Assuming that was correct for UHF, would that be the same for four VHF elements? The balun tied in at the middle, and the wiring started from the top bowtie, crossed over to get to the 2nd bowtie, then went straight down to the 3rd bowtie, then crossed over to get to the last bowtie. How do I wire it? The only wiring I have ever seen was for a UHF antenna that had 4 bowties. All the elements are 2' 4-13/16'' for real channel 10, the only channel I have trouble catching. Is there a certain amount of space to have between the different elements? The window is five feet tall and wide enough for the elements to fit. Being that it is in the window I will have to stack them on top of each other. I am now making an antenna to put in the window which will be made of four folded dipole elements. I would like to have both a VHF and UHF antenna connected at the same time, but I understand that I would need some kind of combiner or diplexer, and I know nothing about that stuff.īeen reading on here a little while, and just joined. Any antenna I make will have to fit in a space that is 34" wide, 5' tall, and 4 and a half inches deep.įor better reception on just channel 10, would making more dipole type elements the same length I have give me better reception? Is there a better High VHF build? Maybe get some kind of amplifier? The antenna needs to face NW, and luckily, the closest window to the tv faces that direction. It catches 10.1 about 95 percent of the time. I made a simple dipole for 10.1, a half inch gap between the elements and a total length of 2 feet 4-13/16 inches. I made a 4 bowtie antenna for UHF and it catches most of my local UHF channels, but not 10.1 on VHF. ![]() All of my local channels are really UHF except for one. ![]()
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