14MHz SSB 10mW Transceiver by JF1OZL
I wanted to QRV on 14MHz SSB mode. I have known that 14MHz can be used for domestic communication. They made Japanese domestic QSO about 14.18MHz
http://www.intio.or.jp/jf10zl/14mssb10w.htm
A CW QRP Tranceiver for 20m band by IK3OIL
The little QRP presented in this article may be built in a gradual manner, in fact it is divided in two main modules (plus VFO), you may also complete only a single part (RX or TX module).
http://www.ik3oil.it/_private/rtx_eng.pdf
A QRP SSB/CW Tranceiver for 14MHz by W7ZOI
Part 1: Exotic circuitry and hard-to-find components aren't necessary if you want to build excellent performance into a home-brew SSB/CW transceiver: Careful design is the key.
http://www.arrl.org/tis/info/pdf/8912018.pdf
A QRP SSB/CW Tranceiver for 14MHz by W7ZOI
Part 2: This moth, W7ZOI rounds out his description of a 1- or 10-W SSB/CW rig with details on its transmitter, TR switching and optional speech processor.
http://www.arrl.org/tis/info/pdf/9001028.pdf
Beta II - a 20m SSB transceiver by PS7PC
This transceiver is a new version of a rig published in AN-EP, a traditional brazilian Ham magazine of 1992, march / april issue by Carlão PS7PC.
http://py2ohh.w2c.com.br/trx/beta/beta.htm
BITX - An easy to build 6 watts SSB transceiver for 14MHz by Ashhar Farhan
BITX is an easily assembled transceiver for the beginner with very clean performance. Using ordinary electronic components and improvising where specific components like toroids are not available, ..
http://www.phonestack.com/farhan/bitx.html
Glowbug Tranceiver by GØUPL
This tranceiver is under construction at G0UPL. It will use only valves, no solid state devices. It will use a superheterodyne architecture to cover 80m and 20m bands with a 5.0 - 5.5 MHz VFO and 9MHz IF.
http://www.hanssummers.com/glowbug.html
HF Transceiver using NE612 by VU2UPX
The inspiration for the project came after attending the HamRadio 2000, Millenium Ham Meet @ Hyderabad (December 22, 23 & 24) where I met Grand Masters like VU2NR and VU2RM, OM Raju and OM Rao respectively.
http://www.qsl.net/vu2upx/Projects/transreceiver.htm
HF TRX with PTO based VFO by VK2ZAY
While surfing around the 'net I came across WA6OTP's website. Now I've seen PTO based VFOs before, but his implementation is very simple and elegant. I just couldn't resist the urge to build one myself and try it out.
http://www.vk2zay.net/article.php/45
Homebrew 20m CW Transceiver by 7N3WVM
Homebrew 20m CW Transceiver.
http://www.qsl.net/7n3wvm/xcvr-20m.html
MultiPig 20 Transceiver by W8PIG
The multiPIG is an Electronic Instrument that functions as an all band QRP Transceiver, a Signal Generator and a Frequency Counter.
http://www.fpqrp.com/pigg20/
The Multi-Pig Phased-Lock Loop Frequency Synthesizer by AA3SJ
The PLL is part of a larger project, the MP20 (multi-PIG) designed by Dieter Gentzow, W8DIZ. Details and construction lessons can be found at the MultiPIG web page.
http://www.qsl.net/aa3sj/Pages/MP20-PLL.html
Mijn Eerste QRP Rig "De Barefooter" door PA2OHH
Toen ik dit ontwerp vond, geloofde ik niet dat het mogelijk zou zijn om er QSO's mee te maken, omdat zijn eenvoud zo'n groot contrast was met de gebruikelijke amateur transceivers met hoog vermogen, superheterodyne ontvanger en andere complexe schakelingen.
http://www.qsl.net/pa2ohh/bafootnl.htm
My Homemade 20m HF SSB Transceiver by OZ2CPU
Output power is now only 4mW, from the Re-used input RF amp that also works as a filter, to only amplify the wanted difference from the mixer, not the sum.
http://www.webx.dk/oz2cpu/20m.htm
Pocket sized 20m (30m) CW QRP transceiver by S56AL
I started to discover the 30m band by using an adapted version of my 80m single-board CW transceiver. The first impressions were quite encouraging, so I decided to build a portable transceiver for this interesting band.
http://lea.hamradio.si/~s57nan/ham_radio/tinka/tinka.html
Radio Ozon - Miniature 20m CW station by GØUPL
This project aims to build a complete miniature 20m handheld tranceiver into an Ozon mint tin. These mints are available at many newsagents here in the UK. The target is a complete station in a box, not just a transceiver.
http://www.hanssummers.com/ozon.html
SSB Exciter with Bi-directional amplifiers and analog switching mixers by KD1JV
This experimental 14 MHz SSB exciter uses bi-directional amplifiers and analog switching mixers. This results in a reasonably simple design, as the amplifiers and mixers can be used for both receiving and transmitting.
http://kd1jv.qrpradio.com/bi_ssb/bi-ssb.HTM
Taurus SSB transceiver by SP5DDJ
When Aquarius project became more popular many QRP-ers asked me if I could develop simple ( means duplicable) SSB version of low cost QRP transceiver.
http://www.qsl.net/sp5ddj/taurus%20eng.htm
The SMK-1 on 20 Meters by NB6M
My objectives in putting the SMK-1 on 20 Meters were to achieve a useful frequency range in both the transmitter and receiver, hopefully the same or near the same in each, that covered the 14.060 Mhz QRP calling frequency.
http://www.amqrp.org/projects/NB6M%20smk20/smk20article.htm
Unique PSK Transceiver
A novel way to make a PSK rig by KD1JV
The usual method of Transmitting a PSK-31 signal is to use a SSB transmitter. The circuit presented here is a method of using the standard PSK audio modulation from a PC sound card to transmit a PSK signal without the need for a SSB transmitter.
http://kd1jv.qrpradio.com/PSKTX/SIMPLEPSKTX.HTM
Un transceiver 14 Mhz simple by F6FEO
En juillet 2004, surfant sur le net, je découvrais un étrange montage de transceiver.
Appareil ultra-simple, décrit par un OM Indien Ashhar Farham, il s'agissait du BITX 20.
http://f6feo.homebuilder.free.fr/transceiver_simple_20m.html
Un transverter 50/21 Mhz de F6FEO
Utilisé conjointement au transceiver 50 Mhz décrit dans ces pages, ce transverter redonnera vie à la station 6 M non utilisée . Cela concerne notamment les longues périodes durant laquelle la bande est déserte.
http://f6feo.homebuilder.free.fr/transverter_50-21mhz.html