Schematic has been changed. C14 (screen bypass capacitor) was added to the schematic. That capacitor is usually built into the tube socket. When I built that AMP with 4CX1000A I used a socket without the […]
The Band Decoder for the 6 to 1 Antenna Switch is working now very well. QSYing is easy going now! I wrote a new code and uploaded it into the Arduino NANO to fit it […]
After trying some different input circuits the conclusion was a series tuned circuit, with a 1 turn link coupling. The coil is 3 turns with ~3/8 id. The coupling loop is about halfway meshed. I […]
I am working at the cavity to improve the input. Because of high SWR I made some experiments with the input circuit. After testing the new input circuit I will show the results here.
This year my lovely wife (Heike, DL3HD) and I (Chris, DL2MDU) had a wonderful vacation in the Wild West of the USA. On our way from San Diego to San Francisco we had the plan […]
A few years ago I have built a Z-Match tuner for QRO. I like antennas fed with open feeder and the priceless advantage of low less in the feeding line. Continue …
Today I started assembling the new K3S Transceiver from ELECRAFT. I used a K3/100 since 2013 on Holidays. In April 2013 I have bought a K3/100 as a kit. Assembling was easy. Performance is outstanding. […]
DL3HD, Heike & DL2MDU, Chris have been on the Island of Boa Vista (Cape Verde) IOTA AF-086. D44TUQ & D44TUK were operating without an amplifier and therefore just CW and RTTY has been used. The vacation was […]