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"Transmitters Q.R.P." article from the "Radio Wsem" magazine, May issue, 1927 18 Aug 2013 | 01:12 am
Yet another vintage Soviet magazine with a yellow-red cover and the giant LENIN quote. Not the best possible design ever, let's turn over the cover. In this article my attention has been drawn to the...
Time machine HOWTO: How to win the ancient QRP contest 23 May 2013 | 11:54 am
Some time ago digging the web for information on The Radio Club of Hartford, I came across this article in QST magazine (September issue, 1921). In a nutshell, it is about a QRP contest as it should b...
Diode Spark Killer for Semiautomatic Key 5 May 2013 | 01:14 am
swing hell yes lots of swing is a pain to copy but a bit of swing, is a horse of a different color add a bit of a chirp and some drift cans on head pre war receiver turn down the lights sit by...
Experimental QRP transmitter by UB5DT, "Radio" magazine, April 1967 19 Apr 2013 | 07:00 pm
For those of my friends tube radio builders, who asked me about "Soviet novice transmitter", "XUSSR QRP TX" (as it pronounced in telegraph),"something authentic, but not too complex" etc, such a RIG s...
Evergreen Exciter for the Special Night 27 Mar 2013 | 04:48 pm
Several days ago I listened to the completely empty ten meters band. There was a lot of noises, quiet CB chewing and nothing else. Suddenly I heard a slow, quiet, but very clear telegraph code, resem...
GKE-100 (ГКЭ-100) Short Wave Generator Tetrode 27 Mar 2013 | 04:41 pm
This out-of-the-way power vacuum tube was widespread, but relatively rarely used by radio amateurs in theirs home-made transmitters, leastwise I could not find any publication of a practical TX circui...
6P7S (6П7С) Sweep Tube 26 Mar 2013 | 02:56 pm
6P7S (6П7С) TV sweep tubes, as their western sisters 6BG6 was used as a horizontal driver in some early black'n'white TV sets. In fact, this tube is not a direct 6BG6 clone, it is an octal modificatio...
GK-71 (ГК-71) Power Pentode 26 Mar 2013 | 02:35 pm
GK-71 (ГК-71) is a somewhat similar (but not the same) to the famous 813 by RCA. There was another soviet replica of RCA 813 - GU-13. GK-71 (ГК-71) has a narrower frequency range and a slightly less ...
6N7 Tube QRP Power Amplifier - One Rainy Day DIY Project 25 May 2012 | 07:27 pm
Once upon a time I'd decided to join a Big Guns Gang and made a Super-Duper Powerful Vacuum Tube QRP amplifier for my 800mW QRPP homebrew telegraph vacuum tube transceiver "3T" (I promise to write a s...
Real Radio? 11 Feb 2012 | 02:06 am
Yeah, it glow! Breadboarding the new T.N.T. based transmitter design. Coming soon.
