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40m Projects - CW Transceivers

Click to enlarge2N2/40 - Original 2N2/40 CW Transceiver by K8IQY
In the fall of 1997, the Northern California QRP Club (NorCal) sponsored a contest. The contest objective was to design and build a functional amateur radio transceiver, using a maximum of 22, 2N2222 type transistors.

Click to Enlarge40m Cristal Pixie by PY2OHH
The famous Pixie is a little CW QRP, probabily the most popular in the Ham world. The schematics is easy to find over the internet, from brazilian to japaneses sites, in that way I find my first Pixie and a lot of mods.

Click to enlarge40 Meter Glowbug and Power Supply by KD6CC
This is 40 Meter, 3 Tube Qrp Transceiver. It has a Regenerative receiver that uses a 3A4, and a two tube transmitter using two, 3S4's for approximately 2 watts output.

Click to enlarge49er Tupiniquim Transceiver by PY2OHH
This project was born when talking with Carlos PY2CSU, we discussed about which transceiver type would be easy to build, with available parts and showing good results. After the 49er came this!

Click to enlarge7MHz CW transceiver by JF1OZL
7MHz is best band in order to make domestic QSO. But 7MHz ssb is too crowded to make QSO with QRP. Therefore 7MHz CW is best way to make domestic QSO. I will show you my handmade 7MHz CW QRP trx.

Click to enlarge7TR1015BB “All PNP on Breadboard” Transceiver by JH5ESM
A QRP transceiver for 7MHz CW only made of single kind of general purpose PNP transistor is presented. No other semiconductor devices (even diodes!) are used. The circuit is built on a solderless breadboard so that it is easy to build, repair and modify it.

Click to enlargeA 40 meter QRP-Transceiver by DL5NEG
This was one of my very first transceiver developments. This page was also one of the very first circuit descriptions that I put on the internet quite some years ago.

Click to enlargePLL tuner for 7MHz QRP Transceiver by DL5NEG
I had developed the 7 MHz CW TRX for my first trip to the US. The receiver worked very well. (Actually a lot better than here in Europe since they do not have high power broadcast stations on 7.1 MHz).

A 40 meters CW QRP transceiver by IK3OIL
This project describes a little QRP transceiver “full legal power” (5W at 12V) for the 40 meters band. The RIG may be built in a gradual manner, in fact it is divided in two main modules, ...

An optimized QRP Transceiver for 7MHz
Here is a rig that provides real challenge for the QRP home builder. Nonetheless, this is a classic circuit and a favorite in the QRP community.

Click to enlargeBuilding the KD1JV MMR-40 "dead bug" style by KD1JV
What is the MMR-40? It is a 40 meter rig with SSB (voice) and CW (Morse code) operating modes. This is a low power (QRP) rig with up to 6 watts CW or PEP (peak envelope power) output. This rig was designed for the ARRL Homebrew Challenge.

Click to enlargeCAIAPÓ - 40m CW Transceiver 1W with 74HC4066 IC by PY2OHH
Following the experimentation with the 74HC4066 chip we decided to build a transceiver based in the receiver described here in this page.
Once more we look up the articles of our friend and namesake PA2OHH Onno, and we observed that it will not be so difficult...

Click to enlargeCAPYAU 1 - Novo TRX 40m CW com mixer a diodos por PY2OHH
Mais um projeto de transceptor para 40m ? Não simplesmente um projeto, mas a reunião de muita coisa que aprendemos com nossas experiências. As principais novidades : No receptor O uso de pré-amplificador de RF, de um mixer a diodos balanceado (não duplamente) e um controle de ganho para o amplificador de áudio, trazem como resultado um excelente desempenho, podendo ser ouvidas estações de DX e o não saturamento do mixer com sinais fortes.

Click to enlargeCAPYAU 2 - Novo TRX 40m CW mixer TA7358 por PY2OHH
Mais um projeto de transceptor para 40m ? Não simplesmente um projeto, mas a reunião de muita coisa que aprendemos com nossas experiências, agora na versão 2 As principais novidades : No receptor O uso de pré-amplificador de RF separado, de um mixer a TA7358 e um controle de ganho para o amplificador de áudio, trazem como resultado um excelente desempenho, melhorando a recepção das estações de DX sem o saturamento do mixer com sinais fortes.

Click to enlargeCURUMIM - The world smallest 40m CW transceiver by PY2OHH
After the success of the CANARINHO and the CURRUIRA we decide to made a transceiver with the minimum number of discrete components. This is the CURUMIM.
There are only 12 components! We assembly in two modules, we try some different audio circuits. But the audio amplifier using the LM386 was the best.

Click to enlargeForty - Oner by SP5DDJ
This name and part of schematic are taken from 49'er where 40 represents the band, and 9 is 9V battery to supply the rig.

Click to enlargeGOITACAS - 40m 5W transceiver with 74HC4066 by PY2OHH
In the last project with the 74HC4066, it it was acting as to mixer, buffer, oscillator VXO and driver in the Tx. In order to increase the power, I decide to substitute the VXO who uses na analogic gate of the 74HC4066, for a VXO using a BJT transistor. Now the two remaining analogics gates are in parallel circuit.

Click to enlargeHomebrew 40m CW Transceiver by 7N3WVM
Homebrew 40m CW Transceiver. Frequency range 7.000-7.030 MHz. RX part: Superheterodyne with RIT and side tone. TX part: Output power 3 Watts with 7.5 Volts 1.0 Amps.

Click to EnlargeJABAQUARA - A 40m Transceiver by PY2OHH
The idea for the JABAQUARA was born in the Yahoo list QRP-BR, where folks always spoke very well from the SW-40, then we resolved to take the enterprise of "tropicalize" the SW-40.

Click to enlargeJABURU -40m CW TRX using a DC PHASE RX (LSB) by PY2OHH
A transceiver with a DC phase receiver.
I was surfing the WEB searching interesting things and I find a article of my friend Onno PA2OHH. We decide to copy the idea and thus the JABURU was born.

Click to enlargeJURITY - 40m CW superhet transceiver by PY2OHH
Sometime back I was visited by PY2CQM ... As he gave an american book about RF as a gift, I asked him how could I repay for it... and this way I was without my super heterodyne transceiver for 40m and the JURITY project was born.

Click to enlargeLACRAIA - A different 40m CW Transceiver by PY2OHH
We show here the "LACRAIA", a transceiver based in the 74HC240, an 8 gates inverter buffer IC. This transceiver was born from the experiments done using high speed digital ICs in radio frequency applications.

Click to enlargeNew 40 meter QRPp Radio by WA6OTP
This is the new Transmitter/Receiver rig for backpacking. It is 3 inches square. It is the same radio as the 80 meter rig. The PTO tunes 150 kc of the band. With one turn it tunes 12 kc.

Click to enlargePT40 - 40 Meter Transceiver by AA3SJ
This was my first attempt at putting together a few "pet" circuits to make a transceiver. Special thanks to Mike, W3TS, and to Wes, W7ZOI, for helpful and much appreciated elmering.

Click to enlargeThe AP-80 An Alternative Pixie by KD1JV
The Pixie is about the simplest rig ever devised, using just 2 transistors and a LM386 audio amp. Unfortunetly, it's also one of the poorest performing rigs ever devised. It's deficentcies are too numberus to list.

Click to enlargeThe simple 7MHz CW transceiver made with Motrola MC3362P by JG1EAD
I made a 7MHz CW transceiver by using the IC for the narrow band FM double super receiving circuit, MC3362P. I intended to make a transceiver for 10MHz band in the beginning.

Click to enlargeTransceiver ultra-simple sur 40m de F6FEO
Voici la description d'un transceiver ultra-simple pour le décamétrique. La version décrite ci-après est monobande, mais rien n'empêche de la réaliser multibande.

Klik voor vergrotingUn transceiver Low Cost Le SANTERRE de F6FEO
Ce transceiver a été calculé pour le trafic sur 7 Mhz, bande délicate car étroite et soumise à de forts signaux en fin de journée.
Par simplicité, j'ai fait appel aux mixers actifs à cellule de Gilbert que sont les NE602 ou 612.

Creation date : 12/08/2007 @ 15:48
Last update : 18/08/2018 @ 00:36
Category : 40m Projects
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