250 kW Short-Wave Broadcast Transmitter SK 53 C3-2

Dati

Forum

Immagini

Collezioni

Specifiche tecniche

Radiomuseum.org
Modello: 250 kW Short-Wave Broadcast Transmitter SK 53 C3-2 - BBC - Brown Boveri; Baden

The 250 kW Short-Wave Broadcast Transmitter, Type SK 53 C3-2 is fully automatic tuning equipped with a class “B” Modulator.

Main features:

transistorized preliminary RF and AF stages
Class B modulation
Only four tubes
all rectifiers with solid state elements
automatic tuning
unlimited choice of frequency in automatic tuning mode in broadcast bands; on special request outside bands
frequency change time maximum 60 seconds for automatic version
sinusoidal and trapezoidal modulation
possibility of high-power SSB service using PSM
easy provision of DCC
protective and automatic sequence circuits ensure safety of the equipment
personnel security system fulfills IEC 215-1
very simple layout of RF circuits ensures easy accessibility to components through doors at front and rear
very high overall efficiency

Abridged Specifications
Carrier power output	250 kW over full frequency range
Frequency range	5.95-21.85 MHz
Output impedance	50 Ω unbalanced/300 Ω balanced (with balun)
Permissible standing-wave ratio (SWR)	1:2.0 at 50 ohm output/1:1.7 at 300 ohm output
Carrier noise level below m = 100%	f = 1000 Hz unweighted: -55 dB
Carrier shift	with sudden application or removal of 100% modulation the variation in the carrier voltage will not exceed 5%
AF input level	for m = 100% modulation across 600 Ω balanced input impedance: 0 dBm - 20 dBm. Recommended 18 dBm
Required time for frequency change	60 s maximum

Autore
Modello inviato da Gary Cowans. Utilizzare "Proponi modifica" per inviare ulteriori dati.

Altri modelli
In questo link sono elencati 20 modelli, di cui 20 con immagini e 2 con schemi.
Elenco delle radio e altri apparecchi della BBC - Brown Boveri; Baden

Collezioni | Musei | Letteratura

Forum