Teltow (amateur radio transceiver)
.jpg)
The Teltow is an amateur radio - transceivers , which from 1970 to 1989 in four different versions in Brandenburg Teltow was developed and manufactured.
Originally designed and manufactured in-house by local radio amateurs for the Teltower Klubstation in 1970 and 1971 , the VEB Kombinat Electronic Components (KEBT) began series production of the transceiver in 1974 and it was distributed to the various club stations in the country.
Nearly two decades was the Teltow in the field of DDR as the formative shortwave - radio amateur radio. Questions about the operation, handling and technology of the transceiver, especially the Teltow 215 , found their way into the amateur radio examination and became an integral part of it.
Development history
With the spread of single sideband modulation (SSB for short) in amateur radio in the 1960s, the desire to use this practical operating mode also matured among radio amateurs in the area of the former GDR . Up until this point in time, military technology and self-made devices were mainly used. Only a few club stations, so-called collective stations, of the radio club of the GDR had a single sideband transmitter at that time.
At the Y53ZD club station in Teltow, Brandenburg, radio amateurs finally began to develop and construct their “own” single sideband transceiver in order to upgrade and modernize the existing technology. In order to realize the project, they soon exchanged experiences with a radio amateur from Berlin. He had completed a university degree in Moscow and, among other things, brought with him insights from Soviet news sportsmen in the field of single sideband modulation. After many hours of voluntary work, the "Teltow 200" was successfully created in December 1971, a tube-equipped single sideband transceiver equipped with magnetomechanical 200 kHz band filters. The name was based on the place name of Teltow in order to make the city known nationally and internationally through future connections. The number 200 stood for the filters used.
| Production figures from 1973 to 1977 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| year | number | ||||||||
| 1973 | 40 | ||||||||
| 1974 | 40 | ||||||||
| 1975 | 80 | ||||||||
| 1976 | 80 | ||||||||
| 1977 | 80 | ||||||||
The central board of the Society for Sport and Technology finally found out about the successful project . And in the following year, at an extended section meeting , he asked VEB Electronic Components in Teltow to develop a similar device in order to upgrade other club stations in the country. In addition, importing similar devices should be avoided.
It was finally decided that production should take place as part of the company's teaching production in the company school "Bruno Kühn". Since the Teltow 200 , which had previously been made individually, proved to be technologically unsuitable for the upcoming teaching production, a follow-up model was developed, the Teltow 205 . It was a two-part, mostly transistorized device with a separate power supply. This pre- series device was then followed by the Teltow 210, a one-piece device ready for series production that could now be produced. About 40 pieces were created from this model, which were distributed to various club stations in the country.
Who was Teltow 210 designed more than three-band transceiver (80-20 meters), should now have a five-band transceivers are developed, not least to the use-value properties to improve the device. In 1974 it was followed by the Teltow 215 . This Teltow 215 was continuously developed in the following years. Until the end of production due to the fall of the Berlin Wall in 1989, this transceiver was manufactured in four different versions. A total of about 820 pieces of the Teltow were produced and, with the exception of a few individual copies, distributed to the country's club stations.
Technical specifications
| Teltow 200 | Teltow 205 | Teltow 210 | Teltow 215 | |
|---|---|---|---|---|
| construction time | 1971 | 1973 | 1974 | 1974 to 1989 |
| Frequency ranges | Amateur bands 80 , 40 & 20 meters | Amateur bands 80, 40 & 20 meters | Amateur bands 80, 40 & 20 meters | Amateur bands 80, 40, 20, 15 & 10 meters |
| Operating modes | CW, SSB | CW, SSB | CW, SSB | CW, SSB |
| Recipient principle | Great with multiple mixes ; ZF / IF 5250/200 kHz; 2 NF levels | Great with multiple mixes; ZF / IF 5250/200 kHz | Great with multiple mixes; ZF / IF 5250/200 kHz | Great with multiple mixes; ZF / IF 5250/200 kHz |
| Output power | about 100 watts | about 90 watts | ||
| speaker | Dynamic loudspeaker , no excitation coil (permanently dynamic ) | Dynamic loudspeaker, no excitation coil (permanently dynamic) | Dynamic loudspeaker, no excitation coil (permanently dynamic) | Dynamic oval speaker |
| Dimensions (BHT) | 540 mm × 350 mm × 235 mm | 542 mm × 222 mm × 348 mm | ||
| Net weight | 25 kg | 27 kg | ||
| Operating voltage | 220 V ( alternating current ) | External separate power supply / 220 volts (alternating current) | 220 V (alternating current) | 220 V (alternating current) |
| Versions | Only one laboratory sample known. There was no series production. | Functional model or pre-series device of the Teltow 210. | A, B, C & D | |
| Comments / special features | Tube equipped. | Tube device partly equipped with semiconductors . | Tube device partly equipped with semiconductors. Around 40 devices were manufactured as part of the teaching production for the GST collective wards. |
Version D has a mechanical scale correction. It is also prepared for the connection of the external frequency counter DFA1. |
more publishments
- B. Petermann, DM2BTO: “The Teltow 210 Transceiver - a worthy contribution to the 25th anniversary of the GDR” in Funkamateur , No. 05/1974 , p. 215
- “Principle operation of the Teltow 210 transceiver” in Funkamateur, No. 06/1974, p. 289
- B. Petermann, DM2BTO: “The Teltow 215 B Transceiver” in Funkamateur, No. 04/1976, p. 194
- "The Fathers of Teltow" in Funkamateur, No. 08/1979, p. 369
- W. Eckert, Y22YD; K.-H. Baumann: "Notes and information on the Teltow 215 D (1)" in Funkamateur, No. 01/1986, p. 26
- W. Eckert, Y22YD; K.-H. Baumann: "Notes and information on the Teltow 215 D (2)" in Funkamateur, No. 02/1986, p. 81
- W. Eckert, Y22YD; K.-H. Baumann: "Notes and information on the Teltow 215 D (3)" in Funkamateur, No. 03/1986, p. 129
- W. Eckert, Y22YD; K.-H. Baumann: "Notes and information on the Teltow 215 D (4)" in Funkamateur, No. 04/1986, p. 179
- W. Eckert, Y22YD; K.-H. Baumann: "Notes and information on the Teltow 215 D (5)" in Funkamateur, No. 05/1986, p. 234
- W. Eckert, Y22YD; K.-H. Baumann: "Notes and information on the Teltow 215 D (6)" in Funkamateur, No. 06/1986, p. 286
- Ernst Erb: Radio catalog . tape 2 . VTH-Verlag, 2006, ISBN 978-3-88180-652-7 .
- Werner Hegewald, DL2RD; Andreas Suske, DL9UNF: "40 years of Teltow - a birthday and a review" in Funkamateur, No. 3/2014, p. 245
Web links
- Description and circuit diagram of the Teltow 2015B (PDF) on the homepage of the German Amateur Radio Club (DARC)
Footnotes and individual references
- ↑ Collective of authors under the direction of Peter Freiberger: Amateur radio examination in questions and answers . 1st edition. Military publishing house of the German Democratic Republic, Berlin 1985.
- ↑ DARC local association Teltow (Hrsg.): The development of the amateur radio transceiver "Teltow" . 2009. ( PDF ( Memento of the original from July 26, 2015 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. )
- ↑ The development of the amateur radio transceiver "Teltow". In: Homepage of the DARC local association Teltow (Y11). DARC local association Teltow , 2009, archived from the original ; accessed on October 22, 2015 .
- ↑ a b Der Teltow 215 on www.radiomuseum.org. , accessed October 18, 2015
- ↑ Werner Hegewald, DL2RD; Andreas Suske, DL9UNF: "40 years of Teltow - a birthday and a review" in Funkamateur , No. 3/2014 , p. 245
- ↑ The Teltow 200 at www.radiomuseum.org. , accessed October 19, 2015
- ↑ The Teltow 205 at www.radiomuseum.org. , accessed October 19, 2015
- ↑ The Teltow 210 at www.radiomuseum.org. , accessed October 19, 2015
