The very first radio’s in the twenties with directly heated filaments all used high voltage battery blocks and a 4 V lead-acid battery for the filaments. It is hard to believe now, but for many decades high voltage batteries were used to power the anodes of radio’s.
#SIMPLE 6V BATTERY GUARD CIRCUIT PORTABLE#
My Pye radio is typical for many portable tube radios of that period which all require a 90 V plate- and a 1.5 V filament-battery. After a thorough clean and replacing several capacitors the set is now in perfect working order again.
A radio like that had been my dream for years, and here it was waiting for me for only 15 pounds! Apart from the fact that the back cover was missing, both the case and the interior of the radio were in pretty good condition. There in an “antiques” shop in Courthouse Street, I bought a delightful Pye P87BQ portable battery tube radio. This page starts with a short holiday trip that my wife, the children and I made to the lovely village of Old-Hastings in the spring of 2010. Click Here to immediately skip to that section. Especially for those readers a simpler version was developed which only uses components which must amateurs will have available in their junk boxes. Some readers objected against the use of a micro-controller because they had no means of programming them.It is the smallest circuit and has many additional features such as: output voltage regulation, automatic on/off detection, automatic output discharge after turn off. The first version uses a small PIC microcontroller.Two versions of the “electronic battery” were designed and tested: Those readers are advised to browse through “The Introduction” and “The Grand Plan” sections (immediately below) and then to skip the sections that describe the final circuits. I can imagine that some readers will find the discussion of the many circuit variants confusing, and not altogether that interesting since most of them didn’t work that satisfactory. Nevertheless, this page has become longer than I ever intended. Secondly, I want to teach especially young people something about electronics and above all experimenting with it. This page is in the first place intended to document this project for myself. The final circuit does not produce any RF interference and has the special feature that it switches itself on and off! This page describes several circuits which convert a 6V battery voltage to 90V to replace the anode battery in battery operated tube radios. If you would consider buying such a kit, please send me an email I would like to get an idea how many people would like to buy such a kit. Some readers of this page have asked me if I could turn this project (the simpler version) into a kit, including PCB. Would you be interested in a construction kit for this project? A Simple No-Nonsense Transistor Inverter (II).A Simple No-Nonsense Transistor Inverter (I).
My current project in the form of a web-log. Electronic 90V Plate Battery An Electronic 90V Plate/Anode BatteryĪ “power”-inverter which emulates the 90V plate/anode battery for vintage battery tube receivers.
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