Summary

The foregoing instructions should not be regarded as hard-and-fast rules to adhere to. It is obviously impossible to describe all the conditions encountered in amateur communication practice. However, it is hoped that the suggestions will assist in getting the desired performance from the ACT-40 Amateur Transmitter. There are a number of textbooks which can be of considerable assistance to the owner of this equipment. The two books that contain the most pertinent information are The Radio...

Introduction

This Instruction Book should be carefully read and studied in order that the owner of a Model ACT-40 Amateur Transmitter will become familiar with the proper installation and operation of this equipment to obtain high quality performance. The straight-forward design of this equipment has made possible simple operation, which may be grasped equally as well by the newcomer as by the experienced amateur radio operator. Once the equipment is properly installed, the signal emitted will have...

Equipment And Accessories

(1) Carefully unpack each unit, giving a general inspection to see that nothing has been damaged during shipment or handling. Each unit has been given a thorough test and inspection before leaving the factory. However, a few minutes spent by the owner in inspecting the equipment may safeguard against some unforeseen accident resulting in damage and delay. (2) The following units make up the 40-watt telegraph and telephone transmitter R-F unit and power supply (ACT-40-R). Modulator unit and...

Antenna Tuning

Inverted Antennas

The preceding data gives an idea of the size of antenna to put up and some indication of what to expect. For example, we wish to load the transmitter into an L type Marconi antenna for 80-meter operation. It is 33 feet high and has a 66 feet flat top. It has an inductive reactance of 750 ohms, which is equivalent to an inductance of approximately 33 microhenries .' h at 80 meters. The antenna appears to the transmitter as an inductance of 33 ,h and a series resistance Ra Radiation Resistance -f...

General Description

The ACT-40 Amateur Transmitter is housed in ACT-40-C black-crackle finish cabinet rack having overall dimensions of 19 inches wide, 15 inches deep, 26 inches high. The weight of the transmitter is approximately 164 pounds. A schematic diagram of the complete transmitter is shown in Figure 19. The ACT-40-R Figures 2 and 3 is the basic unit of this transmitter and is a complete 40-watt C-W telegraph transmitter when used with the required R-F unit accessories as mentioned above and suitable...