Sometimes I need small high voltage power supply for my projects. And I don't want to make special transformers. And I don't want to use special chips for it. In internet I found very simple circuit diagram for classical step-up converter. It is base on very common 555 timer. The coil used in this schematics […]
My brother presented me old radio tube datasheet book. In his Antique Shop you can find interesting stuff and for electronics hobbyist. Also he gave me very old radio tubes dated 1920…1930 years! With very strange base connectors and heating voltages.
This book was printed in 1958, in Leipzig. I have only the first volume, but […]
I found magic eye tube in my closet. It was removed from sold old radio. This tubes were used in old radio units to indicate fine tuning of radio station. In old tape recorders such tubes indicated recording level. I decided to put this lamp into my tube audio amplifier to look it “cooler".
Here is […]
In eBay I bough quite powerful Peltiers (TEC, Thermo-Electric Cooler) unit. According to description it is “TEC cooler - Thermal Enterprises model CP1-12726″.
Specifications:
Model CP1-12726
50mm x 50mm x 3.64mm
245 - 320 Watts of cooling power
Operates from 0-15 volts DC and 0-26 amps
Operates from -60 deg C to +180 deg C
Each device is fully inspected and […]
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