1. [TenTec] Orion rf gain control glitch (score: 1) Author: "Bob Cunnings" <[email protected]> Date: Thu, 9 Dec 2004 18:26:52 -0700 Thanks folks! Toby - no, I haven't tried a master reset, that's a good idea.
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The Big Zapper: All Band Doublet... On The Squid Uses 96 feet quarter wave, or per leg. Copper wire (solid) preferred is AWG #14 or #12. Width is 192 feet total. 6. How To Program Baofeng UV5R... On The Squid New out of the box—one must learn to program your Baofeng UV-5R radio. This guide is useful especially for newbies. Τελευταία ενημέρωση σελίδας:16/06/2008. Στη σελίδα αυτή παρουσιάζουμε Ραδιοερασιτεχνικές ... The Broadside Doublet – L.B. Cebik W4RNL (sk) Extended Double Zepp Broadside Doublet Lengths and Amateur Band Coverage Length (feet) Bands covered •44' 10, 12, 15, 17, 20, 30, 40 meters •66' 15, 17, 20, 30, 40, 60 meters •88' 20, 30, 40, 60, 80 meters
The 1/2-wave 80-meter doublet with ladder line all the way to a 1:1 bifilar choke/balun in or near the tuner is a much better antenna for 80-10, provided you adjust the ladder line length to avoid the voltage and current anti-nodes (i.e., extreme ... Good for early levels on Rookgaard, try to obtain this armor as soon as possible. If you can, go for it after you enter Rookgaard. Click Here to Show/Hide Spoiler Information. Spoiler warning: Quest and/or game spoiling details follow. (Settings: hidden content).Introducing the "All-Band" Doublet: What the Student and the Instructor Should Keep in Mind. L. B. Cebik, W4RNL. Perhaps too many new hams embarking on their first HF adventures think only of...J'ai lu un bon article de L.B. Cebik, ou il donnes deux manieres de calculer sa longueur. 1-Broadside doublet : La maniere ordinaire (0.5 x longueur d'onde a la frequence la plus basse) et 2-Dipole Doublet : la maniere EDZ (1.25 x la longueur d'onde a la frequence la plus haute). Disons que tu veux operer de 40 a 10 m (ce qui est mon cas). There are many times when you have a large modeling problem or you have many smaller problems and you need the fastest system possible to solve the problem quickly. If you’re looking at putting up a Doublet, then a simple 1:1 Balun/Choke at the ladder-line/coax junction will be fine. If your interests are in the lower (<10MHz) bands, adding more wire to the aerial by snaking them on a set of plastic spreaders will also work well. Below is a diagram of an 80m Doublet that I used at my old QTH. In a 12m ... MEMBUAT ANTENNA DIPOLE ½ LAMBDA By Djoko Haryono. 10.Rumus panjang dipole ½ lambda YANG DIPASANG PADA FREE SPACE ( KETINGGIAN YANG CUKUP TINGGI ) "Buddipole" - A Portable Dipole Antenna Design by W3FF This site is for those hams who are "KGD" Short Mono-Band Dipole Antennas by N4SPP This antenna project is my implementation of theAll the resonant dipole antennas I have made previously seemed ... Stealthy Delta SGC Inc. delta loop antenna eBay. Counting Radios February 2014. All Band Doublet Antenna MDS975 co uk HOME. Multiband Vertical Loop Antenna 10 14 21 28 MHz. The Compact Quad Multiband HF Antenna. EZNEC Modeling of Alpha Delta DX EE Multi Band Dipole Antenna. Morse Keys The LTA CRIO and the Kent Twin Paddle. UrBasket eu. M0PLK
RF - Homebrewing a 6 Meter Yagi By Zack Lau, W1VT Six meters is a great band for home built Yagis. The elements are reasonably small, but not so Feb 06, 2011 · Here is a 6 element yagi my friend and I have built for experimenting with directional antenna. Theoritically the antenna has about 10dBi gain in its main lobe and a good Front-to-Back ratio, a perfect substitute if you don’t have means to get the popular V24 Silverthunder antenna.
the same length dipole (doublet) with optimized tuning. Figure 28 plots the gain of both a tuned dipole (doublet) and a B&W 90, folded, terminate dipole. The difference in gain (5-6 dB) translates into an efficiency loss of at least 50% when compared to the dipole of the same length. Visually, it is much easier on the eye than my faithful 30 year old doublet - which is supported by a pole at one end and the house at the other. There is also a middle support to prevent the open wire feeder sagging under the weight. It is hardly inconspicuous. I decided that my EFHW would take the form of an "inverted L". In it, Cebik says "Hence, it is very difficult (although not impossible) to design a feedline system so that on each band we end up with just about the same impedance at the shack entry. Most amateurs let the antenna tuner do the work of transforming whatever impedance appears at the terminals to the transceiver's required 50 Ohms." Aug 30, 2007 · All this from an 80-meter loop at 20 ft. with 100 watts. It tunes from 80 to 6 meters with ease and is a fantastic performer. The thought of adding a reflector or any other such baggage to this classic antenna has never crossed my mind. Did I mention that it is a lot more quiet than a doublet? Dec 28, 2013 · The Cebik Doublet was also an idea. It is an antenna that is actually 1.25 wavelengths at the highest frequency of operation. It provides a broadside pattern on every band it works. The 88’ variety works on 20-40-80. Antenna ppt lecture. 88 ft and 44 ft are popular lengths. These devices present an acceptable load to the transmitter, thus protecting it from high voltages.