Proceed reading this page at your own risk how did it start, doctor. Eventually i bought an egc832 which is the same pinout as a 12ax7 but is one side hi mu and one side med mu so i used the med for tx and the hi for rx. The al7rv w8nsa paraset, regens, test gear, and schematics varnished into enclosures jim w8nsa ex al7rv is an old friend and a really talented radio builder. The schematic i have shown below is most probably an early version, since another schematic i have shows a different keying system, a bit different transmitter section, and the voltage dividers for the receiver are different. This version is mounted within a suitcase, for disguise and portability. The national model 9 tuning dial with pinch wheel gear reduction tuning for the receiver. A friend with a metal shop made a housing and front panel for me that exactly matches the drawings found on the web, which is probably the hardest part to making one of these. If you are wondering what amateur radio is about, its basically a two way radio service where licensed operators throughout the world experiment and communicate with each.
Chappy happy media wbr regenerative receiver, 40 meters april 2018 by dan wissell, n1byt media. The two major challenges for me to create the paraset replica like i have in mind are. The paraset was one of the first successful miniaturized radio sets for britain s special operations executive which conducted espionage and other. In our saturday radio net i explain the idea and 3 om i0br, ik5fuz, i7kvg are interested to the project and i send immediately to them all the drawings. No schematic used and circuits are ones we should know when we wrote. When selecting a tube its important to keep in mind the required filamentheater voltage and current, as youll have to make up a battery to provide the required voltage.
Your paypal receipt is your confirmation that we have received your order. And to make sure the radio kept running, a full set of spares fuses, tubes, crystals was provided. It was a spy radio used by the resistance forces on the mainland of europe. Oluf reed olsens original paraset at the imperial war museum in london. Over the years he has sent me many boxes of very fb radio parts. Vii, also known as paraset, is a self contained miniature transceiver designed from sis section vii. A search for more information soon revealed that the paraset was a small vacuumtube transmitterreceiver unit built during wwii in the uk at the whaddon hall headquarters of the secret intelligence service communications. Paraset french manual one tube transceiver schematiclayout bn1 western radio schematiclayout minimitter electronics illustrated march 1966. The antenna used was usally an end fed wire that was easily thrown into a tree or other support. Wireless equipment, transceiver mk vii paraset, british. This is a very exciting and challenging project for me.
This grouping of rs and cs serves to illustrate the impact that the introduction of. Antique radio schematics and capacitors for tube radios. The scratch build of a customised paraset spy radio in just a few simple steps from schematic to completion. The equipment is known as the paraset because it was dropped by parachute for field agents. For other radios, separate forums can be set up ask the quartermaster. Each schematic is individually digitized in high resolution to provide the clearest possible scan in a downloadable, printable, adobe pdf file. In the paraset there is one coil for the transmitter and one for the receiver. The radio has been tested and found ok september 15, 1953. A bare bones version could probably omit the 6v regulator and run on batteries with just the rf amp, detector and af preamp and a pair of sensitive. Well, i have visited many wwii museums and every once and a while i stumbled over a nice little box, containing some sort of radio, as it seemed. The qcx is a 5w, singleband, high performance cw transceiver kit with wspr beacon, and builtin alignmenttest equipment. Paraset build ages ago i visited bletchley and learnt about these there and i have been collecting the parts ever since. Paraset no 10448 box with joggled lids, photo from alan m0avn. Radios spybritishsketchesrainsketchdrawingssketchingdrawing reference.
Number of amateur radio operators build and operate replicas of the paraset. The mark vii, also known as the paraset, is a selfcontained miniature transceiver. Below i have pictures of my other parasets i have built. The paraset was a three tube transceiver developed by the british during the early part of world war ii. I have the beginnings of one in the best intentions pile here. A look at the circuit schematic shown below will illustrate what is involved in making a paraset. Special operations executive which conducted sabotage, spying, and other nefarious activities behind german lines during wwii. I originally met hakan on a request for a few vernier dials he purchased from jtron back in june.
Some builders dont bother with the pinch wheel mechanism instead they install a small variable tuning capacitor in place of the pinch wheel shaft. I had to use my mfj 259 antenna analyser to measure some parallel and series stacks to finally get the required capacitance. Paraset electrical build the kd6vkf mkvii paraset, ser. Messages were sent on schedule from an array of powerful transmitters in britain and the parasets replied. Stock availability and shipping volume can delay shipping. It is totally amazing to me that i could work coast to coast using the paraset with. Ww2 spy radio paraset qso audio from w0rw and wg0atparaset. The paraset mark vii was one of the first truly successful miniaturized transceivers, built by or for britains s. Welcome to my wwii spy radio called a paraset this is the paraset world war ii spy rig. Paraset drill guide paraset full schematic paraset component layout paraset french manual one tube transceiver schematic layout bn1 western radio schematic layout minimitter electronics illustrated march 1966 theres more to come. Paraset was one of the many types of covert radio dropped by parachute behind enemy lines for use by the resistance.
V, which was much too heavy, among other problems with it. Looking for schematics this forum is all about building and using world war ii spy radio equipment, in particular the whaddon mkvii paraset. Dan, w7oil, another avid parasetbuilder, refers to this as the stealth model. Replicating the prison camp radio and the paraset spy transceiver. Suisse, on5lj sk in 1990 who made the first schematic and mechanical drawing from an origi nal paraset. After much experimentation and wire breakage, i currently have a primary with 6 turns, and a secondary with 8 turns, with the grounded tap again at 1 turn. Paraset drill guide paraset full schematic paraset component layout paraset french manual one tube transceiver schematiclayout bn1 western radio schematiclayout minimitter electronics illustrated march 1966 theres more to come. The schematic appearing earlier on this page shows a primary with 4 turns, and a secondary with 4 turns, with a grounded tap at 1 turn. It is a solid state paraset for 40m with separate receiver and crystal controlled transmitter.
Most american tubes start with a number indicating the voltage 6. A search for more information soon revealed that the paraset was a small vacuumtube transmitterreceiver unit built. I have to admit that this was one of the reasons for progress being so slow during the autumn. The paraset was unlike most of the other types as it also incorporated a transmitter section to allow two way communications in. The paraset transceiver here is a very nice 4 watt cw transceiver paraset whaddon mk v11 built by hakan f. Max maxfield the paraset was a small, lowpower, thermionic valve continuous wave cw morse codeonly radio transmitterreceiver that the soe supplied to resistance groups in france, belgium, and the netherlands. It was developed in an attempt to correct the several problems with the mk. Jean claude have made drawings on the power supply on. It is available for 80, 60, 40, 30, 20 or 17m bands.
The paraset is a miniature transceiver designed for use by soe in espionage and other activities behind german lines during ww2. We have an excellent supply of original factory schematics and service notes for brands such as canadian general electric cge, rogers majestic, philco, rca victor, deforest crosley, marconi, stewart warner, viking, phonola. Jim w8nsa ex al7rv is an old friend and a really talented radio builder. Qrpguys kd1jv para8040set transceiver this product has been retired. Portable set 8 inch also usable without mains dimensions whd 110 x 140 x 225 mm 4. The orginal units were built in metal boxes and some were built in little wooden boxes. Kd6vkf mkvii paraset receiver with band spread caps for 80meters well, it turns out the values of these ceramic discs were off by 10% 20% or so caused the errors, not my calculator. The worst kind of work i know in radio projects is to wind coils.
Vii didnt come along until much later, around 1943. Please note that items here are free and may not be the quality of purchased items. Paraset is the transceiver developed during the wwii. The micromodule system was first adopted for the mass production of sonobuoys used by the navy in large quantities. Over 120,000 all truely free antique radio schematics. The wiring turned out to be the easiest part of this project. V suitcase set which was first dropped into france in around 1941. The singletube 6v6 crystal oscillator utilizes an efficient duallamp visual tuning system to allow easy resonating of both the transmitter plate tank circuit as well as the antenna loading circuit. The paraset radios were used during wwii by the resistance in discreet locations around europe especially in france. Background i first heard of a paraset when i saw a message on the qrpl reflector announcing an upcoming june 6th paraset dday activity. The al7rv w8nsa paraset, regens, test gear, and schematics. The regenerative receiver could be interesting and its essentials could be extracted, it would appear.
Other justradios schematics services schematics for canadian antique radios. Whaddon radio set mk vii paraset commercial trx military u. This is an original paraset no 10448 that alan, m0avn borrowed from a collector. The paraset was a small, lowpower, thermionic valve cw morse codeonly radio transmitterreceiver supplied to the resistance groups in france, belgium and the netherlands during world war ii. Paraset schematic from radio communication 1982 pdf on5ljs drawings. The virtual absence of discrete resistors in the radio reminds me of 1920s battery radio designs, where, often, the only discrete resistor was the grid leak. The paraset was one of the first successful miniaturized radio sets for britains special operations executive which conducted espionage and other. If you search on the internet for paraset radio you will find other homebuilt examples with circuit diagrams and plenty of advice such as. All of his drawing are handmade from a museum paraset wich he measured and made the schematic from. Free antique radio schematics, manuals, and schematics for. A number of amateur radio operators build and operate replicas of the paraset.
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