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Multiband HF Projekten - Ontvangers

Klik voor vergroting0V2 by PE1JPD
This project started because I always wanted to do something with the ‘octal’ tubes I had lying around. As a kid I already played with ECC’s, ECL’s etc, but never with these type of tubes. So what is simpler than a 0V2 receiver to cover AM and/or CW?

Klik voor vergroting17EW8 regenarative radio by JF1OZL
I will show you that, the old triode can be used by low voltage about 12 volts. Please see the circuits. Regenerative radio in old days can make its activity by 17V-DC.

Klik voor vergroting4 transistors handcraft AM radio “NR4K” for kids by JH5ESM
I have written an article on handcraft radio in Eleki-Jack magazine, where toilet paper cores play most important role.
NR4K (abbreviate for “New Radio for Kids”) is designed for LMF501T replacement. It is a workshop material for Radio Workshop for Kids held in Hibikinosai.

Klik voor vergrotingAll Valve Receiver by SMØVPO
Some months ago I began work on an all valve (tube) general coverage receiver for the HF bands. The prototype is now finished, but as I rebuild it on a decent chassis I will post any correction. This should only affect the coil.

A Regenerative Receiver for Beginners
A modern version of the classic regenerative receiver is shown in Fig 17.75. This project was designed and built by Charles Kitchin. This kind of receiver is easy (and fun) to build ...

A Simple Regen Radio for Beginners by N1TEV
Need a simple, fun project - possibly for a Scout Radio Merit Badge? This project is a great way to introduce kids of any age to electronics and shortwave listening.

A Three-Transistor Receiver by W1YDS
Even in this age of crowded bands and sphisticated communications systems, there is room for the lowly regenerative receiver. The unit shown in Figs. 1 through 6 is a simple that should be easy for most anyone to build.

Klik voor vergrotingBattery Powered Tube Regenerative Receiver by K5BCQ
This is my attempt to come up with an improved design point relative to the earlier Air Champ AC-100 and see what can really be done with a Regen.

Klik voor vergrotingCar radio tunes the amateur bands by VK3YE
This is my attempt to come up with an improved design point relative to the earlier Air Champ AC-100 and see what can really be done with a Regen.

Klik voor vergrotingCigar Box Receiver by SMØVPO
I recently sent to QRP@WW a copy of the "CIGAR BOX TRANSMITTER" which was published in the March issue of Practical Wireless. Here is the counterpart to that article, the CIGAR BOX RECEIVER.

Klik voor vergrotingDetectrice a Reaction Ondes Courtes une Gamme de F5LVG
Il s'agit d'un récepteur orienté vers les débutants. Il est relativement simple, et reçoit fort bien les stations de radiodiffusions AM. Il permet, en prime, d'entendre des stations de radioamateurs, mais nettement moins bien que les autres récepteurs à réaction décrit dans ce site et conçus pour la réception de la BLU et la CW.

Klik voor vergrotingDRM Demonstration Receiver by DF9CY
In many ways television and radio will change throughout the near future. Especially we will see the change from analogue to digital technologies like DAB and DVB. ... The new technology is called DRM = Digital Radio Mondiale.

Klik voor vergrotingFireball SOP Receiver by N2CX
A "universal" CW receiver for 80m + 40m (easy to adapt for other bands). Full featured, yet simple construction and easy alignment. Direct conversion design for simplicity and performance.

Klik voor vergrotingFour tubes low voltage regenerative receiver 3 – 19 MHZ by F5LVG
This SW regenerative receiver has only 12 V for B battery. However, its performance is similar or better than usual regenerative receiver. Output power is good for headphones. It is easy to listen SSB, even on 18 MHz. It uses 4 Russian electronic tubes (6N3P) very similar to ECC81 / ECC85, but with a different pin code.

Klik voor vergrotingGeneral Coverage Receiver by ON6MU
This is a compact three transistor regenerative general coverage receiver with fixed feedback. It's based on the principle of the ZN414 only much higher coverage. The sensitivity and selectivity is relative good (especially on the LF and MW bands) as can be expected with this "simple" design.

Klik voor vergrotingJunk Box DC Receiver by 4S7NR
This idea of converting a super-heterodyne radio to a DC receiver came to me when I was a SWL. I built this receiver from a Junked cassette radio. For long time I used to listen to our Ham friends on 40m using my Junk Receiver.

Klik voor vergrotingLow Voltage Two Tube Regen Receiver Using "Space Charge" Technology by K5BCQ
This was a fun project and all started when I was looking for low voltage designs for a Regen Receiver and matching Transmitter. Several of the guys on the Glowbugs (GB) Reflector reminded me of "Space Charge" tubes ...

Klik voor vergrotingLuciferdoos ontvanger door PA3ANG
Recentelijk kwam ik het radiootje weer tegen. Hij zat in een bakje met ‘SPECIALS’ erop geschreven. Het is een bouwsel wat ik gemaakt heb rond 1981. Ik zat in het groene pak (dienstplicht) en was regelmatig op bivak.

Klik voor vergrotingMy First (Homemade) Shortwave Receiver 10kHz-30MHz by PA2OHH
When I made a new start with my old radio hobby, the first item to solve was how to construct something in such a way that the prototype is also useable as the final version.

Klik voor vergrotingKortegolf Ontvanger 10kHz-30MHz door PA2OHH
Deze ontvanger is gemaakt met gebruikmaking van de ervaringen met mijn eerste ontvanger. Deze nieuwe ontvanger heeft enkele verbeteringen en modificaties.

Klik voor vergrotingNA5N Pipsqueak Regen Receiver by WB3GCK
Shortwave radio is what got me interested in this radio stuff in the first place. Ever since I was a kid huddled in front of an old console radio my grandmother gave me, I've been fascinated with the notion of listening broadcasts originating half-way around the world

Klik voor vergrotingRegenerative Short Wave Radio by 7N3WVM
If you happen to have a ferrite bar antenna for short wave reception, try to build a regenerative short wave radio like one shown above.

Klik voor vergrotingPLL wideband receiver by JF1OZL
This is a radio receiver covering the frequency from 500kHz to 9MHz. PLL digital tuner is used in this radio, therefore the receiving frequency is set by the switches on the front panel.

Klik voor vergrotingPortabele Regeneratieve Ontvanger door PA2OHH
De prima ontvanger van Keith G0KJK heb ik niet nagebouwd. Ik wilde een eenvoudige versie met een heel laag stroomverbruik en een lagere voedingsspanning dan de 9 tot 12 volt die hij gebruikte.

Klik voor vergrotingKleine Portabele Regeneratieve Ontvanger door PA2OHH
Wanneer er niet zoveel knoppen op zouden zitten, zou het een byzonder geschikte schakeling zijn voor het maken van een mini ontvanger met een klein batterijtje.

Klik voor vergrotingPreá Regenerative Receiver by PY2OHH
Tropicalized version of the famous "Desert Ratt", regenerative receiver for SWLs, hobbists, listeners and radio hams. It uses 3 NPN garden type transistors and a LM386 as the audio amplifier. This receiver can be regarded as a QRP (low power) because the regenerative stage uses some microwatts in order to work.

Klik voor vergrotingQuick Receiver by SMØVPO
How many of you have got loads of test equipment in the shack that is not really doing anything most of the time. I have got a couple of RF signal generators and a stereo amplifier (for music) amongst other things.

Klik voor vergrotingRecepteur a Reaction a Antenne Cadre de F5LVG
L'originalité de ce récepteur est de permettre l'écoute des ondes courtes sur un récepteur à réaction, sans aucune antenne extérieure par l'emploi d'un cadre. Il est adapté à la radiodiffusion, comme au radioamateurisme.

Klik voor vergrotingRecepteur a Reaction Special BLU de F5LVG
Une détectrice à réaction est un récepteur simple relativement sensible du fait de la réaction. Ce procédé consiste à réinjecter à l'entrée d'un amplificateur une partie du signal de sortie qui est alors réamplifié, ce qui augmente de façon importante le gain du montage.

Klik voor vergrotingRecepteurs a Reaction Ultra Modernes de F5LVG
Pour les premiers amateurs la découverte des bandes ondes courtes s'est fait avec des détectrices à réaction. Ces montages restent d'actualités, sous réserve d'employer des composants modernes pour s'adapter aux conditions actuelles de réception.

Klik voor vergrotingRegenerative receiver 5.5 to 18 MHz by F5LVG
The receiver described below is designed to be built by a beginner. It uses rugged components. It requires no switching. A single tuned circuit must be realized. Its frequency range is 5.5 to 18 MHz. It is possible to receive the main broadcast bands and ham bands of 20 m and 40 m.

Klik voor vergrotingRegenerative receiver by AA5TB
Regenerative receivers have a long history in radio dating back to the first days of the vacuum tube. Though they were once very popular among amateurs and professionals alike, they are now thought of as mere play toys instead of legitimate receivers. Most of this reputation is due to design short cuts that have been implemented over the years.

Klik voor vergrotingRegenerative receiver with 6SN7GT by SM5GNN
This is my October regenny as it looks right now. It works but more adjustements must be done before I'm happy with it. It's based on the 1950 ARRL handbook design.

Klik voor vergrotingShort wave radio by JF1OZL
I will show you one of my first projects. I made it about 13 years ago. This is a radio. It does not have RF amplifier. It has two stage of IF amplifier. It is a normal single super radio.

Klik voor vergrotingA simple crystal set for free power radio by VK3YE
Of any electronic project, the crystal set would have to rate as one of the most popular. Many amateurs are on the air today because of their early construction of a crystal set. Most practical electronic books for beginners include at least one crystal set project.

Klik voor vergrotingSimple, low cost AM SWBC Receiver by KD1JV
This AM Short Wave Broadcast Receiver is a reasonably simple, but effective design and can be built at low cost. It requires no adjustments to get to work and is more or less fool proof. This makes it a great beginners project, with little or no test equipment. The radio can be built for about $20.00, even if all new parts need to be bought. Many of the parts can be salvaged from an old AM/FM transistor or clock radio.

Klik voor vergrotingSuperheterodyne receiver - 15 17 20 40 80 m - BJT by F5LVG
This is a simple receiver for the 15 17 20 40 80 m bands.

Klik voor vergrotingSW ontvanger met spectrum monitor functie door PA2RF
Het hier gepresenteerde ontvangertje is in eerste instantie bedoeld voor de sterke omroepzenders, maar het blijkt dat na aanbrengen van een BFO de ontvangst van CW en SSB (EZB) signalen prima mogelijk te zijn.

Klik voor vergrotingSynthesised HF Receiver by SMØVPO
This receiver was originally designed for simplicity and low cost, but, like other projects, it grew. My receiver is now synthesized and the performance is quite comparable to many commercial designs.

Klik voor vergrotingThe Progressive Receiver by AA3SJ
Original design by W7ZOI and K5IRK. My version of the Progressive Receiver was built following the schematics and text found in the 1982 ARRL Handbook, section 8-37ff. The original article is found in QST November 1981.

Klik voor vergrotingThe Sudden HF Receiver by G3YCC
The Sudden direct conversion receiver was described by Rev George Dobbs, G3RJV in Sprat number 58, back in 1989, and has proved to be a popular little receiver, for which a kit is available from Kanga Products.

Klik voor vergrotingTransistor Radio Receiver by GØUPL
I built this simple regenerative short wave radio receiver in 1982 with a lot of help from my Dad. It ran on a 9 volt battery installed in the back of the box, on the right hand side.

Klik voor vergrotingTwo Regen Receivers by SMØVPO
I still think that the simple receiver is a very important part of a QRP station. In the 30s and 40s regenerative radio receivers were very popular; they are simple to build & give very good results, even for CW and SSB operation.

Klik voor vergrotingValve Radio Receiver by GØUPL
This one was a lot of fun. This valve receiver was constructed in 1988 in the traditional way, i.e. an aluminium front panel and chassis. A mains isolating transformer and rectifier was also required, this was built in a separate box ...

Klik voor vergrotingHam Radio BFO by VU2AAP
Regular broadcast receivers are meant for reception of AM signals. A simple free running oscillator oscillating at the receiver's IF (intermediate frequency) beats with the incoming signals in either CW or SSB and the resultant audio frequency goes to the AF amplifier.

Klik voor vergrotingSSB Adaptor by VK2YBX
Most experienced amateurs know that SSB (single side band) reception requires a receiver fitted with a product detector or BFO (beat frequency oscillator) to reinsert the missing carrier.
They also know that such receivers command significantly higher prices than AM only models.

Creatie datum : 08/08/2007 @ 23:27
Laatste wijziging : 27/11/2016 @ 23:08
Categorie : Multiband HF Projekten
Pagina gelezen 38119 keren

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