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Rudi Herzog (Continued)
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The top photo is a drawing of an OC50 point contact transistor from
VALVO, 1954. The orange unit above is a junction type from TEKADE, 1955.
The radios shown in the upper right are the Regency TR1, the first all
transistor radio from USA in 1954. Next to it is a TELEFUNKEN TR1, from
1955. This is a very rare radio, as described by Rudi in the text.
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Rudi Herzog (Continued)
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1956
Electronic magazines report
of the TELEFUNKEN TR-1 transistor radio. But it should take again more than
a year until the very first handheld transistorized radio came to market.
On the Leipzig-Fair in East-Germany the very first East German transistors
OC811 and OC812 are displayed. In June 1956 VALVO reached the
1-million-barrier on production of the OC70 transistors. In fall of 1956
the first transistors for IF-stages were presented:
OC45 from VALVO
OC612 from TELEFUNKEN.
In December TELEFUNKEN has
the OC604 spez, a small power transistor for single-end-AF-stages (50
milliwatts output). This transistor should be used for the audio
output-stage of the first German handheld transistor-radio, that came to
market in April of 1957.
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Go To Rudi Herzog Page 7
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