Early crystal rectifiers and diodesFirst German old semiconductor related web page, online since 12/12/1997 You will find here: |
Fruehe Kristall-Detektoren und DiodenErste deutsche Seite ueber fruehe Halbleiter, online seit 12.12.1997 Sie finden hier: |
A short semiconductor and RF rectifier history | Kurze Geschichte der Halbleiter fuer HF-Gleichrichtung |
Crystal rectifiers were employed for demodulation quite early (1905) in radio technology. Crystal radio sets used various semiconductor crystals. In the first years of wireless technology fritters, also called coherers and Schloemilch-cells (1902) were employed to detect radio frequency. The Sirutor-rectifier exists since 1925. You will find more information about crystal rectifiers and crystal radio sets at: Gollumīs Crystal Receiver World. Crystal detectors with their different crystal types were quite efficient but were awkward to use. The Sirutor and later germanium point-contact diodes were not quite as sensitive but easy to use. The first germanium point-contact diodes were developed in the U.S. in 1949/50. In Germany germanium diodes were employed since 1952 (1950). Early suppliers were Intermetall, SAF, Proton, Dr. Rost , Elektro Spezial, Siemens, TeKaDe and Telefunken. |
Kristall-Gleichrichter (1905) wurden schon in der Fruehzeit des Rundfunks zur Demodulation eingesetzt. Im Detektor-Apparat kamen diverse Halbleiter- Kristalle zum Einsatz. In den ersten Jahren der drahtlosen Funktechnik kamen zur HF-Gleichrichtung auch Fritter, auch Kohaerer genannt und Schloemilchzellen (1902) zur Anwendung. Den Sirutor- Gleichrichter gab es seit 1925. Mehr Informationen zu Kristall-Gleichrichtern und Detektor-Empfaenger finden Sie hier: Gollumīs Crystal Receiver World. Die Kristall-Detektoren mit ihren verschiedenen Kristall- Typen waren recht leistungsstark, aber umstaendlich zu bedienen. Der Sirutor und spaeter die Germanium- Punkt-Kontakt- Dioden waren zwar etwas unempfindlicher, aber dafuer betriebssicherer. Die ersten Germanium-Punkt-Kontakt-Dioden wurden 1949/1950 in den USA entwickelt. In Deutschland kamen ab 1952 (1950) Germanium- Dioden zur Anwendung. Intermetall, SAF, Proton, Dr. Rost , Elektro Spezial, Siemens, TeKaDe und Telefunken gehoeren zu den fruehen Anbietern. |
Early Germanium diodes 1950 / Fruehe Germanium Dioden 1950 |
Part of my "Early Semiconductor" collection.(Teil meiner Halbleiter-Sammlung) |
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Model Modell |
Manufacturer Hersteller |
Description Beschreibung |
181z | SAF | |
2089 | Siemens | |
AA112 | Germanium | |
AA119 | Siemens | Germanium, point contact |
AA132 | Telefunken | Germanium, point contact |
OA5 | Valvo | Germanium, point contact |
OA70 | Valvo | Germanium, point contact, RF |
OA81 | Valvo | Germanium, point contact |
OA85 | Valvo | Germanium, point contact |
OA95 | Germanium | |
OA159 | Telefunken | Germanium, RF |
OA161 | Telefunken | Germanium |
OA174 | Telefunken | Germanium |
RL232G | Siemens | Germanium, point contact |
Sirutor | Siemens | Kupferoxydul rectifier |
List
of early Germanium diodes / Liste von fruehen Germanium
Dioden 1950-1954 |
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Model Modell |
Manufacturer Hersteller |
Description | Beschreibung |
1A | ? | ||
1B | ? | ||
1C | ? | ||
1N34 | Sylvania | universal. 1950? | universal. 1950? |
1N35 | |||
1N38 | Sylvania | ||
1N54 | Sylvania | ||
1N55 | |||
1N56 | Sylvania | ||
1N60 | |||
BH | Proton | RF. 1950 | HF. 1950 |
BN | Proton | RF. 1950 | HF. 1950 |
BN5 | Proton | RF. 1952 | HF. 1952 |
BN6 | Proton | RF, SW, FM-dem. | HF, KW, UKW-dem. |
BN15 | Proton | ||
BH30 | Proton | ||
BH60 | Proton | ||
BH80 | Proton | TV | TV |
BH6 | Proton | Miniature | Mini |
BK60 | Proton | Miniature | Mini |
CK705 | Raytheon | 1951 * | 1951 * |
CK707 | Raytheon | ? | ? |
DS60 | SAF | RF, FM-dem. | HF, UKW-dem. |
DS61 | SAF | RF | HF |
DS80 | SAF | RF, FM-dem. 1951 | HF, UKW-dem.1951 |
DS160 | SAF | universal | universal |
DS601 | SAF | RF, FM-dem. | HF, UKW-dem. |
DS602 | SAF | RF, AF | HF, NF |
DS1604 | SAF | RF | HF |
GD1E | Siemens | universal | universal |
GSD5/6 | TeKaDe | universal | universal |
GSD15/4 | TeKaDe | universal | universal |
GW20 | Dr.Rost | TV | TV |
GW40 | Dr.Rost | ||
GW101 | Dr.Rost | RF | HF |
GW102 | Dr.Rost | RF, FM-dem. | HF, UKW-dem. |
GW103 | Dr.Rost | RF, FM-dem. | HF, UKW-dem. |
GW203 | Dr.Rost | ||
GW401 | Dr.Rost | RF, AF | HF, NF |
GW702 | Dr.Rost | RF, AF | HF, NF |
M550 | Intermetall | universal | universal |
M880 | Intermetall | low Ohm universal | Niederohm |
M1230 | Intermetall | universal | universal |
OA50 | Elektro Spezial, Philips |
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OA51 | Elektro Spezial, Philips |
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OA55 | Elektro Spezial | ||
OA56 | Elektro Spezial, Philips |
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OA60 | Elektro Spezial | TV | TV |
OA61 | Elektro Spezial, Philips |
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OA150 | Telefunken | universal | universal |
OA159 | Telefunken | AGC | Regelsp. |
OA160 | Telefunken | RF | HF |
OA161 | Telefunken | ||
RL6 4/10 | Siemens | FM-dem. | UKW-dem. |
RL6 8/10 | Siemens | RF. 1951 | HF. 1951 |
RL1 | Siemens | 1950 | 1950 |
RL131 | Siemens | universal | universal |
RL132 | Siemens | universal | universal |
RL133 | Siemens | universal | universal |
RL134 | Siemens | universal | universal |
RL205 | Siemens | ||
* = Thanks to Bob Breitung
for dating information. Who has more information about the above shown semiconductors? |
Semiconductor advertising | Dioden-Werbung |
Advertising of Intermetall, 1953 Advertising of Proton, 1952 |
Werbung von Intermetall, 1953 Werbung von Proton, 1952 |