336
Item nr.
Modern variation of Four Tube Circuit
| Production | Hungary, 1959. |
|---|---|
| Bands | LW (937-2000m), MW (200-576m). |
| Tubes | ECH81 (osc. & mixer), ECH81 (IF and AF amp.), EBL21 (det. & output), EZ80 (rect.). |
| Cabinet | Wood. Size 38x26x18 cm. Weight 6 kg. |
| Power | AC 50W. |
| Documents | Service Doc (in Hungarian). |
The reason I wanted this radio was, that it is is a late example of the Four Tube Circuit; the Orion 636 was originally equipped with ECH21 tubes, but later editions had more modern tubes. 
The model dates back to 1958, but this set had a filter capacitor dated 1959, so it must be a later series.
| Obtained | 1/2012 from Johan vd Heuvel. |
|---|---|
| Condition | 7. |
| Disposed | Sold 6/2018. |
| Sound sample | PLAY SOUND In the Old Days, when the Night had just Begun, one could hear a lot of music playing. During the first decade of the 21st century, receiving MW stations has become increasingly difficult because of stations being replaced by static. |
The radio came with back and bottom panels, and removing them reveals old but rather clean and intact inner parts. There are some 8 to 10 paper capacitors that must probably be replaced. Near the output transformer (mounted on the speaker) there was a loose wire, but tracing it revealed where it should go.
The output transformer is mounted on the loud speaker, and this assemply is connected to the chassis by no less than six wires. The resistors and capacitor of the feedback circuit are on the transformer. On the right you can see the replaced parts: some paper caps, the volume pot (the switch was defective) and the EZ80 tube.