PCGG Transmitter PCGG Transmitter

PCGG were the call letters of the telephony channel with which Idzerda opened a broadcasting service in 1919. The transmitter has been employed at various times up to 1931. On February 24, 1924 under No. 6976 patent was applied for the system of frequency modulation by NV Dutch Radio Industry, and obtained. The transmitter was probably used for experiments and the construction of a station for the KNMI, therefore the state and the technique are no longer the same as in 1919. The broadcasting transmitter PCGG was donated to the Postal Museum in 1948 by his widow.
The transmitter includes a number of objects that are not in the picture: a conical funnel microphone, a microphone and a phonograph / gramophone.

PCGG were the call letters of the telephony channel which Idzerda opened a broadcasting service in 1919. The transmitter has been employed at various times up to 1931. In the applied system of frequency modulation by NV Dutch Radio Industry on February 24, 1924 under No. 6976 patent applied for and obtained. The transmitter was probably used for experiments and the construction of a station for the KNMI, therefore the state and the technique no longer the same as in 1919. The broadcasting transmitter PCGG was donated to the Postal Museum in 1948 by his widow.
The transmitter includes a number of objects that are not in the picture: a conical funnel microphone, a microphone and a phonograph / gramophone.
Technical information:
Rectangular brown polished wooden base with a wooden uprising in the middle. At the front side are mounted on the base plate: two sliding resistors for controlling the filament current for the transmitting tube; interception transformer modulator circuit; tube holder with modulator tube Philips B 406; filament current resistance of modulator tube; for battery negative grid voltage; filament current commutator. Front rebellion: transmitter tube Philips Z5; aerial flow meter 0-4 A; grid coil transmitter tube with variable coupling on the modulator; tuning circuit grid with grid and capacitor leakage resistance; anode current meter modulator tube 0-100m; anode flow meter transmitter tube 0-1500 V. Back rebellion: two HF inductors in anode power transmitting tube; HF choke chain transmitting tube anode; tuning coil in the anode circuit transmitting tube; coupling capacitor; supply capacitor anode circuit; light bulb holder. Rear base plate two series resistors voltmeter 0-1500 V; transmitting tube Philips TC 2/250; two sliding resistors for control filament transmitting tube; tuning anode circuit. Open wiring. Further components: A microphone terminal box Switch box Microphone Converter: Cast iron base with three-phase slip ring motor 220/380 V, alternator 1000 to 1300 V, 0.1 A and alternator 30 V, 10 A Switchboard: these are the technical details the description of the second picture.