This is the 101'st anniversary of Sputnick. It was a pair of 3 tube transmitters. Hams are talking about it, but this comment on batteries caught my eye. Just a passing thought about batteries...
The power supply of the onboard radio equipment of the first satellite was completely autonomous - from silver-zinc batteries. The filament battery consisted of five elements SCD-70 with a capacity of 140 Ah and provided a voltage of 7.5 V. The anode battery consisted of 86 cells SPD-18 with a capacity of 30 Ah and provided a voltage of 130 V to supply anode batteries. transmitter chains. It had taps for powering the screen (90 V) and pentode grids of the output stages (10 V), as well as the manipulator (20 V). The mass of these batteries was about 50 kg, i.e. it was a significant part of the mass of the entire satellite. The batteries were supposed to provide uninterrupted transmitters for 14 days. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
