In the Januar edition of the RAZzies magazine Frank Waarsenburg PA3CNO continued to report about building a replica of the original Sputnik 1 transmitter. In his interesting article he writes about the difficulties and obstacles he faced: Missing data for winding the coils, errors in 2p19b datasheets and a critical bug in the schematics. He described his approaches to tackle these problems and I was happy to read that he found my blog providing some useful information for him.
I think for everyone who is interested in understanding the Sputnik 1 transmitter or who wants even to build a replica Frank's article is a must read. Please note that the RAZzies is a Dutch HAM magazine. If you don't understand Dutch simply use the Google translator or similar tools in order to get a translation.
The image above shows Frank's version of the Sputnik 1 transmitter and a switching power supply build on a Veroboard.