Micro-Electronic micro pocket radio Schematic

Micro-Electronic micro pocket radio

Get a print!

Product Information:
Model:micro pocket radio

Schematic Pages

PNG: Page 1 Rider Manual Volume 20
PNG: Page 2 Rider Manual Volume 20

Schematics Content

Page 1:

Your Micro Radio kit contains all the necessary parts for building the complete set.
You will also need solder, soldering iron, and a screw driver.
The pictorial schematic diagram and photo graphs of both sides of the chassis show correct placement of parts.

To construct your set
1. Solder in wires that compose the circuit.
2. Install condensers.
3. Install resistors,
4. Install tubes - IMPORTANT The plate lead on these tubes are color coded with a red dot on the side of the glass tube envelope. This will be referred to as No. 5 lead, The leads of each tube are:
No. 5 - Plate.
No. 4 - Screen.
No. 3 - Filament positive.
No. 2 - Control grid.
No. 1 - Filament negative,

5. Attach RF coil to the chassis as shown in photo. This coil must be attached in such a manner that it misses the large screw hole on the bottom of the chassis, to allow the radio to be cased without damage to the coil.
6. Solder the headphone leads to the screen and plate of the output tube.
7. Attach the two contact springs for battery positive contacts.
8. Solder in antenna.
10. Attach clip to the other end of antenna wire.

The instrument is now ready to be tested. Place the chassis in the bottom half of the case, and insert the four self-tapping #crews through the case and the chassis. This will allow the chassis to be held firmly in place, and thus enable you to insert the batteries to make contact with the negative and positive contacts.
Attach the metal clip on the antenna to an aerial connection - Buch as the metal portion of a

Page 2:

Telephone, lamp, outside antenna, or similar object. Now insert the batteries, making certain that the metal plate on the bottom of the case slide touches the bottom of both batteries, and the small metal plate on the chassis below coil. Now put the iron core (slug) hallway in the RF coil. It is wise to attach the small plastic button temporarily on the bent screw in the iron core for easier tuning.
Turn the switch on, and slide the slug slowly back and forth in the coil until you hear a whistle, which is the signal of a radio station. (If this whistle is not heard, you probably have the connections to the tickler winding reversed).
After you hear the whistle, back the volume control down until the whistle disappears. then retune by moving the iron core back and forth just a trifle until the station is properly tuned in.

If your radio brings in stations, it is now ready to be cased. Remove the batteries, then place the spring over the bent brass screw of the slug. ard the brass washer on top of this spring. Now put the top half of the case in place, in such a Inner that the end of the brass screw in the slug will come through the slot provided for tuning.
Tighten the four screws in the case. Cut off the brass screw so that it does not extend beyond the outside of the case more than 1,16 ". Screw the plastic tuning knob to the threaded portion of the brass screw.
After this is done, place the batteries back in the instrument in the proper manner. making sure that the metal portion of the bottom of the slide makes contact with the bottom of the A battery. the bottom of the B battery, and the metal plate-and your Micro Radio is complete.