So this is a little amp built around the TDA7262 from ST. It is the only active component in it. Around are some caps resistors and plugs.
The datasheet can be found here.
While exploring the different methods of generating some waveform I stumbeled on an old project of mine that has been shelved for almost a year because it would not work no matter what I tried. So I got out, redesigned the pcb, soldered new components and wasted 4 hours tracking down some trace issues. But in the end I had a working DDS function generator based on this simple but effective design: http://www.scienceprog.com/avr-dds-signal-generator-v20/
Hi, I just started a dream project: Building an oscilloscope from scratch. Originally I wanted to use a russian 13LO37I but it turend out to be too bulky so I went and scored a waaay smaller 3KP1 / DG 7-113 from ebay.
I’ll put up a high res Photo of the tubes weiring system at my website.
One of the first portable TV-sets: http://www.radiomuseum.org/r/pilot_candid_tv_tv37.html
The DG 7-113 / 3KP1’s wiring system:
The russians 13LO37I / 13ЛО4И:
I found the first plans at Jogis Röhrenbude: http://www.jogis-roehrenbude.de/Bastelschule/Miniszill/Miniszill.htm
The opamp I used was a 4558D
Does anyone have any Ideas what that is?
Just made 4 Boards (1x PSU, 2x oscillator, 1x output-amp) for a new simple audio testoscillator. Most components will come from used boards.