Abstract An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front…
Projects for the amateur radio engineer. Hardware, software, electronics and test equipment for the amateur community.
Tag: HF
A “lean design” SSB-Transceiver for 14 MHz
Preface Currently I am revising older projects that are in my radio shelf, some of them not finished yet, postponed to a later date, some without a cabinet, some with severe problems with performance and so on. All the stuff that needs a “second chance” ;-). This project is one of this collection. The transmitter…
Revision of the “Cigarette Pack”- 14MHz SSB QRP Micro-Transceiver
This article describes the “Cigarette Pack” SSB QRP transceiver” for 14MHz that I first had mentioned some months before. Recently, when taking it from the shelf, the transceiver dropped to the floor and was severely damaged. This lead to serious defects in the front panel area, the main frame, the cabinet and so on. The…
Improving the receiver for the 7MHz QRO transceiver
After having done lots of QSOs with the 7MHZ QRO transceiver I found that the receiver still had to be improved. The sensitivity was great, the sound also was but there were some difficulties when operating the radio during evening and night times because some (minor) interference was audible. This symptom had been caused, as…
Going back in time: “Old school” transceiver for 20 meters with 20 watts of output
Hi again! This project directly “beams” you back to the “Good ol’ 80s” when there was no stuff like “DDS, “OLED” or even “SDR” or other modern technology we today use to build our radios. I designed this transceiver using the “old school” techniques because in a German QRP forum on the internet some hams…
Shrinking a QRP transceiver to (nearly) the size of a pack of cigarettes
Hint: This article is only a preview to this miniature sideband transceiver. The full description can be found here: https://dk7ih.de/2019/04/22/revision-of-the-cigarette-pack-transceiver/ The challenge started some weeks ago, when John, ZL2TCA, commented to this blog you next challange is to build a rig into a cigerette packet size case. My problem: I don’t smoke, have never smoked…
A Micro Multibander – Step by step (Part III): The Receiver (Overview)
This project has been cancelled but finally succeeded in another multiband transceiver: https://dk7ih.de/2020/01/03/an-experimental-hf-6-band-ssb-transceiver-part-1-basic-outline/ (Start entry for a series of articles covering this respective radio)
A Micro Multibander – Step by step (Part II): VFO and Front Panel
This project has been cancelled but finally succeeded in another multiband transceiver: https://dk7ih.de/2020/01/03/an-experimental-hf-6-band-ssb-transceiver-part-1-basic-outline/ (Start entry for a series of articles covering this respective radio)
The semi-automatic antenna tuner – Version 1b
This article is outdated! Please read about the new version of the antenna tuner here! People frequently reading my blog know that I love to improve the things presented here. This is revision one of my semi-automatic antenna tuner for QRP. I found that the reading of the SWR value on the LCD is a…