How to enter service mode — chassis 5N11, 5P60 ,14/21S01

The circuit presented here is a very useful add-on device to be connected to the telephone lines to count and display the number of incoming calls received in the absence of the subscriber.
The circuit can be fabricated using low-cost and easily available components. It uses a popular decade counter ic, a timer ic, and [...]

FD-SWM-VHF

Measuring SWR at VHF/UHF frequency was never a fun. Most radio amateurs just assume that their 50 ohms cable is matching a beam or GP.
SWR [...]

This Power Supply puts out 22[Volts] by max. 4[A]. Be sure you use the right transformator 30[Volt] at least 130[Watt]!!! Also make sure that all capacitors can handle the delivered voltage, see schematic 63[V] will do.
Allthough one TIP2955 can deliver almost 10[A] (when oversized cooled) it’s better not to go beyond 5-6[A]. To prevent you [...]

http://www.radiodelta.nl

TIREAL TFT Test description
TIREAL TFT Test – Compact program for fully testing and configuring your LCD-TFT monitor
TIREAL TFT Test is a compact application for fully testing and configuring your LCD-TFT monitor.
Tests:
- Base color test
- Interference and video noise test
- Grayscale test
- RGB test

TIREAL TFT TEST 1.1.rar

Parts List:
2470 pF mica capacitor C1, C5
175 pF mica capacitor C2
139 pF mica capacitor C3
112 pF mica capacitor C4
20.001 uF disc or monolythic capacitor (marked either 102, .001, or
1n) C6, C8
20.1 uF disc or monolythic capacitor (marked either 104, .1, or
100n) C7, C9
110 to 22 uF electrolytic [...]