20
Item nr.


Grundig 2066 Table top



Data for Grundig 2066
ProductionGermany, 1958.
Price was fl 329.
BandsLW, MW, FM.
TubesECC85, ECH81, EF89, EABC80, EL84, EM84.
Semi-
conductors
selenium rect.
CabinetWood.
PowerAC.
DocumentsAdvertisement calendar 1958/59.

The Design

The wood radios with piano keys were very much in fashion in the late nineteen fifties. The piano keys becane the favorable way to switch bands shortly after FM had been introduced widely.

The tubes used in this radio were standard during several years. The early days of FM had seen experiments with EC92 or EF80 in the tuner section, but starting from circa 1956 the ECC85 was used for this purpose. This tube remained in use until the end of the tube era, around 1970. The ECH81 is the AM converter (and FM first IF stage) and was used for this purpose from its introduction in 1952 and also until the end of the tube era. The EF89 is IF stage (Intermediate Frequency) for both FM and AM reception. In the fifties the combined tube EABC80 was used for detection, AM and FM, and the first audio amplification stage. (Later this combination would disappear, FM detection would be by semiconductors, AM detection in the IF tube, and AF amplification combined with the output tube.) The output tube EL84 was popular until about 1960, when combined triode-pentode tubes like the ECL82 came into use. The German radios usually used semiconductor rectifiers in the power supply, while Philips kept using tubes for this purpose until about 1965.


Obtained4/1995 from Flea Market.
Condition7.
DisposedSold 10/1996.

This Object

This radio was offered at the Queen's Day Flea Market by two boys as working. One hould never really believe such a claim, but the price was fair even for a parts set. Indeed it didn't work, but this radio was the first one on which I carried out a non-trivial repair. I measured the voltage on the pins of all the tubes and found that the IF tube (EF89) had zero volts on its screen grid. The cause was, of course, one of the yellow bang-capacitors that had decided it was time to short out. Replacing it was no big deal, and voila, the radio worked again!

Part of Gerard's Radio Corner.
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