Ben Tongue Crystal Radio Set Design Section A

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Crystal radio set design and optimization with,

Hyperlinks to and brief descriptions of 29 Articles written by Ben Tongue that relate to crystal radio set design The main purpose of these Articles is to show how Engineering Principles may be applied to the design of crystal radios. Measurement techniques and actual measurements are described. They relate to selectivity, sensitivity, inductor (coil) and capacitor Q (quality factor,Crystal Radio Set: Better sensitivity, selectivity and,,15/07/1999· A New Way to look at Crystal Radio Design. Get Greater Sensitivity to very Weak Signals, and Greater Volume, less Audio Distortion and Improved Selectivity on Strong Signals . By Ben H. Tongue . Quick introduction: Greater sensitivity to very weak signals can be attained by lowering the RF signal power level (linear-to-square law point, or LSC point) at which the detector changes from the,Ben Tongue on Crystal Sets - The RadioBoard Forums,Discussion of all levels of crystal set building and use. Put pictures of your sets in your posts, talk about the component parts of crystal sets. DX bragging is allowed. 24 posts 1; 2; Next; KR1S Site Admin Posts: 6381 Joined: Sat Jun 06, 2009 6:58 pm Location: Cochise County, Arizona. Ben Tongue on Crystal Sets. Post by KR1S » Tue Jun 20, 2017 2:24 am If Mr. Tongue's estate objects, I will,

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Crystal Radio Plans, Schematics, and Circuits

Vest Pocket Crystal Radio (This is not the same "Vest Pocket" plans show elsewhere on this page) JPG File(s) Page 1 Page 2. added 12 June 04 #147 Selective, Fixed Detector Crystal Set. JPG File(s) Page 1 Page 2. This set of plans is also below, but is a better copy added 18 Jun 04 #148 Crystal Set Built Into Toy Telephone JPG File(s) Page 1CRYSTAL SET DXing - QSL.net,CRYSTAL RADIO SET SYSTEMS - Design, measurement and improvements. Detailed circuit analysis by a brilliant engineer, Ben Tongue. PEEBLE'S ORIGINALS - Parts, projects, books and more. By Mike Peebles, Xtal Set Society's chief techi guy. HISTORICAL RADIO SOCIETY of AUSTRALIA - Some beautiful homebrewed sets. Original plans for the famous and very efficient "Mystery Set" SCOTT's CRYSTAL RADIOS,A compilation of Crystal Set drawings and schematics,Crystal Set c 0m P/N IN34 Detector un ing oil Capac i looopF Tap Earth Terminal Coi': 1.6 inch o.d. 23awg Wre Antenna: 5 turns Detector: 30 turns tapped at 20 turns. Phones 3-22 47k Ohm Tunes 5-7 mhz anmox. β€” Shortwaue Crystal Radio by Dave Schmarder A miniature, but selective and high performance CRYSTAL RADIO KIT

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Ben Tongue R.I.P. - The RadioBoard Forums

24/04/2015· Sad indeed. Mike said it best, "an institution in the science and art of crystal radio". Thank you Ben. Top. Garry Posts: 1457 Joined: Tue Jan 14, 2014 10:19 pm Location: near Syracuse, NY. Re: Ben Tongue R.I.P. Post by Garry » Thu Jul 09, 2015 1:54 am Thank you for letting us know, Al. Sad news. I've thought about him from time to time and wondered how he was doing. He has been absentCrystal Radio Page - Hobby Tech,The antenna tuning capacitor is a conventional two section 365 pF variable. The,I made this radio in August, 2008. The design objective was to make a crystal set a little smaller than my previous ones, but with no compromises in performance. This set uses two antique 3.25 inch National Velvet Vernier drives. The antenna capacitor is a dual 365 pF obtained from the Xtal Set Society. The,Crystal Radios "Stay Tuned" Crystal Sets,Crystal radio plans, crystal radio circuits, crystal radio schematics are all right here. Sound powered headphones and how to use them on crystal radios. Crystal Radios, Crystal Set, Crystal Sets, Catswiskers, Science Fair Crystal Radio, and much more! 8’ Loop X-tal Set. by Josh Young Overall size, and how the set looks when it is in use on it’s homemade chair/stand. Up close of the,

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Table of Contents - Amateur Radio Station KR1S, Lowband,

22/10/1999· By Ben H. Tongue. Quick Summary: This Article discusses the use of audio transformers with crystal radio sets and gives the results of loss measurements on several of them. A method for measuring insertion power loss is also described. Many crystal radio set designs provide impedance step down taps on the final RF tuned circuit. If the diode is,An FM Crystal Set - Electron Bunker,The low R 0 would normally make them a bad choice as a crystal set detector (galena aficionados notwithstanding). However, it appears that this particular resonator circuit has a very low resonant RF output resistance, which turns out to be a good match to the diodes. For more info on this, see Article #4 on Ben Tongue's site. This low RF,Crystal Radio Page - Hobby Tech,The antenna tuning capacitor is a conventional two section 365 pF variable. The,I made this radio in August, 2008. The design objective was to make a crystal set a little smaller than my previous ones, but with no compromises in performance. This set uses two antique 3.25 inch National Velvet Vernier drives. The antenna capacitor is a dual 365 pF obtained from the Xtal Set Society. The,

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What makes a good variable capacitor for crystal radios?

First, anyone that wants to build a dx set should visit the crystal radio DX'ers best friend, Ben Tongue's website. Specifically his paper dealing with variable capacitors as used in crystal sets. In his article 24, section B1, his charts plainly show the difference between a holy grail and an everyday capacitor. One even wonders how a crystal,Antique Radio Classified--Homebrewing,26/12/2003· Cabin Fever--A high-performance crystal set. BY ALAN DOUGLAS . WEB EDITION. We all know that "real radios glow in the dark," but in this article, Alan Douglas describes a "real radio" that doesn't. His home-brew crystal set is an excellent performer. (Editor) It all started last February, when a notice appeared in the "Radio Classified" section of the Antique Radio Forum offering soundBuild Your Own Crystal Radio | Science Project,A crystal radio is a very simple radio that was popular in the early history of radios. It is an electrical circuit that can pick up and play sound from AM radio stations. Rather than rely on outside electrical sources, like a batteries or plugs, crystal radios get their power directly from the radio waves. The diagram in Figure 2, shows the,

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Crystal Radio Bandwidth Measurements

FO-215 40.5 -13.6 194 38.3 -14.1 7.6 -21.7 93.0 4.4 -26.5 1N34A 33.0 -13.1 150 45.0 -10.5 10.3 -19.8 100.4 8.7 -21.2 2 Schottky 27.0 -16.7 184 31.0 -15.5 4.5 -25.7 87.0 2.4 -31.2 Radio under test: Dave's Homemade Crystal Radio #50, Coils spaced 10 inches (25cm) Signal Generator: Jackson 640. Output connected to the antenna and ground terminals via dummy antenna network pictured below,Radio/Electronics Projects,Based on a 6ME8. Not a multi-section tube, but just a single active device that can drive a speaker on DX. More info Two Tube Superheterodyne Receiver . This was my first Superhet project. I used this in the 2008 winter 1AD Contest held annually by the Birmingham Alabama Crystal Radio Group. More info One Tube AM Broadcast Transmitter. Screen modulation with carrier control. Uses a,Crystal Radio Circuits - techlib.com,The crystal radio gets its name from the galena crystal (lead sulfide) used to rectify the signals. A "cat's whisker" wire contact was moved about the surface of the crystal until a diode junction was formed. The 1N34A germanium diode is the modern substitute for galena and most other germanium small-signal diodes will also work well. Silicon diodes are not a good choice because their much,

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Macrohenrydyne Most Powerful One Transistor Radio

Using a very high gain transistor for both radio and audio frequencies, Bazian's design had the loudest output of any one-transistor radio I've ever heard. It drives a speaker to room volume on local stations and it's reasonably selective. Then I learned of an upcoming DX listening contest for radios that use only one active device. I began optimizing the basic Bazian circuit to become my DX,An FM Crystal Set - Electron Bunker,The low R 0 would normally make them a bad choice as a crystal set detector (galena aficionados notwithstanding). However, it appears that this particular resonator circuit has a very low resonant RF output resistance, which turns out to be a good match to the diodes. For more info on this, see Article #4 on Ben Tongue's site. This low RF,Antique Radio Classified--Homebrewing,26/12/2003· Cabin Fever--A high-performance crystal set. BY ALAN DOUGLAS . WEB EDITION. We all know that "real radios glow in the dark," but in this article, Alan Douglas describes a "real radio" that doesn't. His home-brew crystal set is an excellent performer. (Editor) It all started last February, when a notice appeared in the "Radio Classified" section of the Antique Radio Forum offering sound

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Ben Nock, Military Wireless Museum

The set might be Hungarian made or from the Comm Block collective. The receiver is a double conversion design, 10.7 MHz and 455 kHz intermediate frequencies. The set came fitted with 4 channels, around 33, 42, 70 and 71 MHz. the rf section of the set automatically tunes to match the crystal selected.Heart of England Crystal Radio Club – Geoff Roberts,I decided to name this radio The H.G. WELLS 'Time Machine Crystal Radio' because it belongs to a Bygone age when things were made simply and very well engineered mechanically. Its really out of its time in this day and age. It works extremely well with its 'Dave Schmarder style Spider Coils' I made this radio for Ralph Stevens who serves on the 'British Antarctic Survey Ship' Lets hope he,Build Your Own Crystal Radio | Science Project,A crystal radio is a very simple radio that was popular in the early history of radios. It is an electrical circuit that can pick up and play sound from AM radio stations. Rather than rely on outside electrical sources, like a batteries or plugs, crystal radios get their power directly from the radio waves. The diagram in Figure 2, shows the,

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Crystal radio - Wikipedia

A crystal radio receiver, also called a crystal set, is a simple radio receiver, popular in the early days of radio.It uses only the power of the received radio signal to produce sound, needing no external power. It is named for its most important component, a crystal detector, originally made from a piece of crystalline mineral such as galena. This component is now called a diode.Scott's Crystal Radios and Antique Headphones,This is a great site to get ideas for how to build your own nice tube or crystal radio. Ben Tongue's Crystal Radio Website This website had valuable details on crystal radio reception, impedance matching, and even schematics for building impedance determination equipment for comparing headphones of different impedances.Radio/Electronics Projects,Based on a 6ME8. Not a multi-section tube, but just a single active device that can drive a speaker on DX. More info Two Tube Superheterodyne Receiver . This was my first Superhet project. I used this in the 2008 winter 1AD Contest held annually by the Birmingham Alabama Crystal Radio Group. More info One Tube AM Broadcast Transmitter. Screen modulation with carrier control. Uses a,

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Crystal Radio Circuits - techlib.com

The crystal radio gets its name from the galena crystal (lead sulfide) used to rectify the signals. A "cat's whisker" wire contact was moved about the surface of the crystal until a diode junction was formed. The 1N34A germanium diode is the modern substitute for galena and most other germanium small-signal diodes will also work well. Silicon diodes are not a good choice because their much,Empfindlicher und selektiver Detektorempfänger für,"Crystal Radios" von Al Klase N3FRQ, besonders interessant CRYSTAL SET DESIGN 102 für die Schaltungspraxis von Detektorempfängern. "Crystal Radio DXing" von von VE7SL - beschäftigt sich mit DX-Empfang. "Designing a dx crystal set" von Mike Tuggle - Konstruktion eines DX-Empfängers, vergleichbar mit den Konstruktionen von B. Bosch und B.H,,

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