1983 German DXpedition to Spratly Islands. DJ3NG along with his friends was on his way to Spratly DX Pedition. A night before arriving at Spratly, his boat was attacked and sunken by Vietnamese gunships. DJ6SI fortunately survived and issued this QSL to mourn DJ3NG, DJ4EI, and others killed by this incident. A short story…
New P4dragon DR-7800, a completely new development, and the first PACTOR-4 capable short-wave modem. P4dragon stands for the most ingenious data transfer algorithms and the highest computing power possible in PACTOR controllers of the 4th generation. The fast quad-core DSP used in the DR-7800 enables for the very first time, a high data rate, approaching…
The high speed protocol PACTOR-4 (P4), is THE HF-Data protocol of the 4th generation, using the most modern methods of adaptive channel equalization, channel coding and source compression. The resulting highly adaptive ARQ mode adjusts itself almost perfectly to the varying conditions of the short-wave channel. Due to the narrowly synchronized ARQ grid (like with…
by VE1BWV LINK
With a simple, clean design this Elekit TU-879S single-ended, class-A vacuum tube amplifier kit echoes past greats like the Japanese made Audio Note Ongaku. Supplied with EH 6L6 tubes, this versatile amplifier is able to handle just about any octal based power tube on the current production market. We have tried it with JJ KT77,…