Signal Processing And Electronic Encryption

62 EE May 1988 Completed prototype of the VLF converter. The screening fitted onto the component side prevents oscillation and spurious mixer prod- ucts. about 200 kHz (10.200 MHz on the re- ceiver), e.g. Droitwich (AM). Reduce the input gain of the receiver, and peak C13 for optimum reception (this adjustment is relatively uncritical). Stations and services It should be noted that the VLF con- verter has some conversion gain, so that Some stations that can be received below 150 kHz. Frequency 16 kHz 50 kHz 60 kHz 71 kHz 75 kHz 77.5 kHz 117.4 kHz 134.2 kHz 139.0 kHz Station GBR Rugby (UK) RTZ Irkutsk (USSR) MSF Rugby (UK) not identified HBG Prangins (SUI) DCF77 Mainflingen (FRG) DCF37 Mainflingen DCF54 Mainflingen DCF39 Mainflingen Power 60 kW 50 kW 50 kW 20 kW 50 kW Service time signals during the 5 minutes preceding 03.00h, 09.00h, 15.00h and 21.00h. standard frequency. standard frequency & BCD time and date signals. time signals. BCD time and date signals. standard frequency & ...