7 - The working of the local oscillator can be checked with a simple VLF receiver or frequency counter. Remember that it is supposed to be set 10.7MHz above the desired listening range. If the oscillator works, only a defective or incorrectly installed part can prevent the rest of the receiver circuit from working.
It has been designated a VLF-LF receiver, because it tunes the VLF-LF range from 10 to 300 kHz, but it also tunes part of the MF spectrum from 300 to 500 kHz. The VLF and LF bands have their own unique useful characteristics and these will be discussed further on. The receiver design is a little different from the usual form.
Feb 04, 2018 · Feb 4, 2018 - AV multiband VLF receiver All-Electronic LRLs
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