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VLF Projekten - Ontvangers

Klik voor vergrotingA LowFER Receiver Using a "Software" IF by KLR
This article describes a "software" receiver that uses a simple, low cost hardware downconverter in conjunction with sound-card software such as DL4YHF's "Spectrum Lab" or I2PHD's "SDRadio", which act as a tunable DSP-IF system.

A very simple VLF Pocket receiver by DJ1WF
The following receiver concept may give an idea how to build a tiny and sufficiently performant RX without using expensive filters.

Klik voor vergrotingA VLF-LF receiver - 10kHz to 500 kHz with resistance tuning by VK5BR
The receiver design is a little different from the usual form. It has no variable capacitors or inductors except for one preset trimmer in a trap circuit. Tuning is carried out by a potentiometer, the resistance of which sets the frequency of the heterodyne oscillator.

Klik voor vergrotingAn electro-mechanical RX for VLF by MBMU
It is basically a direct conversion receiver. It has a 2 pole passive preselector with RF bandwidth of about 800Hz, which also impedance matches the antenna to the mixer. The mixer uses saturating ferrite cores, in a way not unlike the SAQ keying circuit.

Klik voor vergrotingUsing a PC with soundcard as a VLF receiver by DL4YHF
This article describes how to use your PC as a receiver for narrow-band signals in the VLF radio spectrum.

Klik voor vergrotingVLF/LF to 28.5 MHz Receiving Converter by DF3LP
This converter is one of my early projects. It is built using "ugly style" in a small metallic case usingBNC for in- and output connection including some internal shielding of the crystal oscillator.

Klik voor vergrotingVLF Tube Receiver by IWBZD
The circuit described below has been designed to match the requirements above. As main feature, it works with a single 12V source. It can be also feed with a little Ni-Cd or Pb battery, like the ones used in most anti burglar systems. Due to its low power consumption the circuit is able to work for many hours.

Klik voor vergrotingVLF nach KW-Konverter durch DG7XO
Dieser Converter stammt von der Homepage http://www.radiosky.com ab.Ich habe dazu ein Layout fr ein OM aus unserem OV gemacht, dass ich auch hier zur Verfgung stellen mchte.

Creatie datum : 07/10/2020 @ 21:04
Laatste wijziging : 26/10/2020 @ 20:02
Categorie : VLF Projekten
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