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HF Propagation


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Multiband HF Projects - Receivers

Click to enlarge0V2 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?

Click to enlarge17EW8 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.

Click to enlarge6x2 Superheterodyne Receiver by AA8V
The 6x2 superheterodyne receiver is a 6 tube, 2 band receiver for 80m and 40m with a special position for receiving WWV at 5 MHz. Modes are CW, SSB, and AM, The receiver features a powerful 4 watt audio amplifier, crystal filter for single-signal reception, and 100 kHz crystal calibrator.

Click to enlargeA 0V1 Tube Receiver by PA2OHH
When I was a beginning radio amateur, I wanted already to make a 0V1 radio receiver with a tube. But it never came so far. When I told that to my colleague Alfred, he gave me a nice present, all kinds of parts to make a 0V1 tube receiver!

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 ...

Click to enlargeA 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.

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.

Click to enlargeA very simple receiver by PA2OHH
"Barefoot" technology or simple, cheap and harmless technology. It was certainly not the intention to make a good receiver. No, the question was what you can receive with a very simple receiver with only one active component.

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.

Click to enlargeBattery 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.

Click to enlargeFireball 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.

Click to enlargeFour 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.

Click to enlargeGeneral 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.

Click to enlargeH.F. SUPERHET receiver Mk I by VK6FH
Based heavily on a design in Amateur Radio mag' (Australia) of May 1995; (TCF {twin crystal filter} 40 metre transceiver by Drew Diamond VK3XU). With L-C circuits as shown; tunes 3 to 13 MHz approx.

Click to enlargeH.F. SUPERHET receiver Mk II by VK6FH
In the Mk 2 version I have replaced the IF strip/2nd L.O. 4.43MHz (recycled) "colorburst" crystals with new 4 MHz units. These are so cheaply available now, I obtained 100 units for $14 Aus!

Click to enlargeH.F. SUPERHET/HOMODYNE rcvr Mk III by VK6FH
I was curious to hear just what a HF direct conversion type receiver (AKA homodyne) actually sounds like? A whole new construct was considered, but it became apparent that with a simple mod' of my previous effort, a receiver using either "superhet" or "direct conversion" modes, would result.!

High Performance Regenerative Receiver Design by N1TEV
There have been several popular Regen projects in recent QSTs and ARRL Handbooks. Look at the design process and progress; then build one - or both - of the receivers described.

Click to enlargeJunk 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.

Click to enlargeLow 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 ...

Click to enlargeMC3362 multiband CW QRP RX by LY3LP


Click to enlargeMy 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.

Click to enlargeNA5N 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

Click to enlargeNew high performance regenerative receiver by F5LVG
I made this regenerative receiver for 5 amateur bands : 80 40 20 17 15m. With this Rx and a home made transmitter, I made several SSB QSO between North America and France.

Click to enlargeNouveau récepteur à réaction de F5LVG
La découverte des ondes courtes dans les années 20 et 30 s'est faite essentiellement avec des récepteurs à réaction. À l'époque, ces récepteurs employaient des tubes électroniques de faibles performances.

Click to enlargePLL 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.

Click to enlargePortable Regenerative Receiver With Very Low Supply Current by PA2OHH
It is a modern portable version of the historical regenerative receiver, with transistors and a short telescopic antenna plus RF preamplifier. And it is a real QRP receiver, supply is only 2 mA at 6 volt.

Click to enlargePreá 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.

Click to enlargeQuick 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.

Click to enlargeRécepteur 20 composants de F5LVG
Ce récepteur s’adresse à ceux qui désirent construire leur premier récepteur pour l’écoute des ondes courtes, radiodiffusion et radioamateurs.

Click to enlargeRecepteur 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.

Click to enlargeRecepteur 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.

Click to enlargeRécepteur décamétrique 3 - 30 MHz de F5LVG
Comme j'ai fréquemment l'occasion de le dire, jamais, jamais il n'a été aussi facile de bricoler et de produire des ensembles cohérents et performants.

Click to enlargeRécepteur SDR - 1 à 30 MHz de F5LVG
Eh oui, encore un... Il va falloir s'y faire car sans être devin ou descendant de la Pythie de Delphes, je pense que le temps du récepteur à architecture traditionnelle est révolu.

Click to enlargeRecepteurs 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.

Click to enlargeRegenerative 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.

Click to enlargeRegenerative 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.

Click to enlargeRegenerative 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.

Click to enlargeRegenerative 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 vergrotingRod Tubes 12V Regenerative Receiver by F5LVG
My goal was to make a tube receiver operating with a single voltage of 12V at the lowest possible current (100 mA).
The receiver is of the type RF amplifier, regenerative detector, AF amplifier (for headphones).

Click to enlargeShortwave Receiver 10kHz-30MHz by PA2OHH
This receiver was made with use of the experiences of my first receiver. This new one has some improvements and modifications.

Click to enlargeShort 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.

Click to enlargeSimple, low cost AM SWBC Receiver" TARGET="_blank"> 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.

Click to enlargeSmall Portable Regenerative Receiver by PA2OHH
The Big portable regenerative receiver is quite successful. The electronic circuit would be very suitable for a small portable receiver if there were not so many controls and switches.

Click to enlargeSuperheterodyne receiver - 15 17 20 40 80 m - BJT by F5LVG
This is a simple receiver for the 15 17 20 40 80 m bands.

Click to enlargeSynthesised 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.

Click to enlargeThe G4AON Universal Receiver by G4AON
This receiver was originally built to replace a Drake R4A which had been used in conjunction with a simple crystal controlled transmitter.

The HBR-3 Amateur HF Receiver for 80-10 Meters by WN2A/B>
HBR-3 Receiver architecture is super-heterodyne, using down-conversion in front of a buffered 80 meter Direct-Conversion receiver.

Click to enlargeThe 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.

Click to enlargeThe 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.

Click to enlargeTransistor 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.

Click to enlargeValve 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 ...

Click to enlargeHam 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.

Click to enlargeSSB 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.

Click to enlargeVery High Performance Regenerative Receiver by F5LVG
The receiver is built in a wooden box of 12x22x2.5 cm. Adhesive copper foils (5 cm) are glued on the back of the front panel. These bands serve as shielding and ground plane. It is useful to make soldering points between the different strips.

Creation date : 08/08/2007 @ 23:27
Last update : 10/09/2020 @ 20:53
Category : Multiband HF Projects
Page read 70856 times

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