"NiceRig" 40-30, 10 MHz CW transceiver 1 watt QRP by PA2OHH
Ervaringen met de bouw van de 40-30, een ontwerp van de NE-QRP club. De naam staat voor een 30 meter transceiver en de prijs van het bouwpakket: 40 dollar. Er is ook een 40-40 en je raadt het al, deze variant is bedoeld voor de 40 meter amateurband.
http://www.qsl.net/pa2ohh/qrp30nl.htm

10 MHz 2 W CW transceiver by JH1USG

http://jh1usg.html.xdomain.jp/rig/10CW3W/10CW3W.htm

10 MHz 5 W CW transceiver (DC) by JH1USG

http://jh1usg.html.xdomain.jp/rig/10cw_dc/10CW_dc.htm

2N2/30 - A 30 Meter, Discrete Component CW Transceiver by K8IQY
The 2N2/30 claims its heritage from the 2N2/XX platform, but also uses non-2N2222 transistor types and commercial mixers. From the beginning, it was to be a test bed for building with surface mount parts in a Manhattan-style construction environment.
http://www.k8iqy.com/qrprigs/2n230/2N230page.htm

30m Band - All BJT Transceiver by YO3DAC/VA3IUL
Reason building this radio is to get a real portable QRP transceiver with low power consumption.
On receive, the current consumption is approximately 100mA, and no more than 1.8A in TX mode, at full power.
http://www.qsl.net/va3iul/30m%20All%20BJT%20TRX/30m_Band_All_BJT_Transceiver.htm

30m QRP transceiver – Part 1 by PA3HCM
This summer I want to go walking in the beautiful highlands of Scotland, together with my wife. The mobile phone coverage in this desolate area is none or poor, but hey… I’m a radio amateur! For a daily “sign of life” I need a lightweight transceiver, and 30m (10.100 – 10.150 MHz) seems to be a perfect band for this purpose.
https://www.pa3hcm.nl/?p=543

30m QRP transceiver – Part 2 by PA3HCM
Building a stable VFO is challenging. Oscillators tend to drift away due to (very small) temperature fluctuation, or due to small capacitive changes in the direct environment (e.g. the frequency changes when you move your hand towards the oscillator). The VFO used in my 30m QRP transceiver is not different from others, so I had to deal with the same issues.
https://www.pa3hcm.nl/?p=636

30m QRP transceiver – Part 3 by PA3HCM
Now all LF parts and the VFO were finished, it was time to build the RF-part of the receiver.
https://www.pa3hcm.nl/?p=662

A 30M QRP CW Transceiver built Manhattan Style by WØPWE
Early in the millennium a group was formed on the QRP-L reflector to promote building equipment using the "Manhattan" style of construction. The effort was called MH101 for Manhattan 101. The idea was to build a 30M transceiver based on the K1SWL SW 30 design.
https://www.qsl.net/w0pwe/MH101/MH101.html

Homebrew 30m CW Transceiver by 7N3WVM
This simple receiver was originally intended to check the transmission of my 30m QRSS beacon. By tuning the 30m receiver to Russia's RWM timesignal on exactly 9996kHz I was able to calibrate my frequency counter.
http://www.qsl.net/7n3wvm/xcvr-30m.html

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

Simple 30m Band QRP CW Transceiver by DL2YEO
This simple QRP transceiver for the 30 m band did not result from a detailed requirement profile. I simply had some NE592 broadband amplifiers in my junk box, waiting for an application.
http://www.qrp4u.de/docs/en/30m_trx/index.htm

SW30+ 30 Meter CW Transceiver by K8IQY
This 30 meter CW transceiver was built as part of an internet Manhattan-style construction course conceived and taught by my friend Chuck Adams, K7FO back a few years ago.
http://www.k8iqy.com/qrprigs/sw30+/sw30+page.htm