- 136 kHz direct conversion receiver
- IK2PII describe here a simple direct conversion receiver, thinked for QRSS and DFCW communications, as companion of ARGO or SPECTRAN programs.
[ Hits: 572 | Votes: 0 | Rating: 0 ]
- 136kHz at G3YMC
- 136 kHz experience by G3YMC
[ Hits: 310 | Votes: 0 | Rating: 0 ]
- 136KHz portable station
- 136kHz portable station project by PA4VHF Dick
[ Hits: 1558 | Votes: 2 | Rating: 9 ]
- 200W 136 kHz transmitter
- A transmitter project for the 136 kHz band by IK2PII
[ Hits: 360 | Votes: 0 | Rating: 0 ]
- A LF power amplifier
- A Low Frequency (LF) RF Power Amplifier by VK5BR it operates in a linear mode and can handle CW, AM and SSB.
[ Hits: 3300 | Votes: 2 | Rating: 1.5 ]
- Amrad LF operatoins
- Lot of useful information on experiments on 136 Khz band, with antenna tips DSP infos and notes on their activity in LF.
[ Hits: 1400 | Votes: 4 | Rating: 9 ]
- An easy loop for VLF
- An easy VLF loop, 200Hz-20kHz reception without transformers by Renato Romero and Marco Bruno
[ Hits: 7448 | Votes: 7 | Rating: 4.86 ]
- Antenna Noise and Signal Cancelling at LF
- By using the signals from two antennas, controlling their relative amplitudes and controlling the phase of one of them, unwanted signal or unwanted noise can be phased out. Circuitry is described which uses the signal from a wire antenna to provide selective cancelling against the signal output from an LF loop antenna.
[ Hits: 7890 | Votes: 6 | Rating: 4.5 ]
- Antenna Noise and Signal Cancelling at LF
- The fact that the phasing between a wanted signal and an unwanted signal can be different on different antennas is put to advantage. With this condition, the unwanted signal can be cancelled out by controlling amplitude and phase. The heart of the system is some form of phase control circuitry.
[ Hits: 626 | Votes: 0 | Rating: 0 ]
- Antennas for MF and LF
- Long Waves, Short Antennas, designing antennas for MF and LF communications
[ Hits: 2370 | Votes: 2 | Rating: 6 ]
- CEPT ERC 136 Khz Recommendation
- Use of the band of 135.7-137.8 kHz by the amateur service
[ Hits: 748 | Votes: 0 | Rating: 0 ]
- DK8KW Longwave Information
- Useful pages of longwave operations, includes a lot of reference files, beacons list, sounds and pictures
[ Hits: 1458 | Votes: 1 | Rating: 8 ]
- European 135.7 - 137.8 kHz Band Plan
- This is not an officially recognized band plan for the European LF allocation between 135.7 and 137.800 kHz. This plan just contains my own observations and shall help the newcomer to get some orientation on where to find what.
[ Hits: 1364 | Votes: 3 | Rating: 4 ]
- Frequency Calibration for Weak Signal Work
- Accurate calibration of your receiver and sound card is necessary for good results with the weak signal modes in use at LF. Modern receivers with master oscillators that are synthesized to provide all conversion frequencies greatly simplify the process. This article describes a method of making the necessary measurements and adjustments to an ICOM R75 receiver and a sound card, using the ARGO software
[ Hits: 866 | Votes: 1 | Rating: 7 ]
- Ham Radio below 9 kHz
- DK8KV Longwave information
[ Hits: 623 | Votes: 2 | Rating: 6 ]
- Introduction to Longwave Radio
- A brief introduction to longwave radio
[ Hits: 2028 | Votes: 5 | Rating: 6.6 ]
- Keyboard Modes for 600 Meters
- Evaluation of various operating modes on 600 meters
[ Hits: 788 | Votes: 0 | Rating: 0 ]
- LF MF Antenna Tuner
- W5JGV antenna tuner for 150 - 500 Khz band
[ Hits: 2843 | Votes: 2 | Rating: 8 ]
- LF Sound Gallery
- Sounds from the 136 kHz band
[ Hits: 1010 | Votes: 4 | Rating: 3.25 ]
- Loading Coil for 136 kHz
- Pictures of loading coils according to OK1FIG
[ Hits: 1496 | Votes: 1 | Rating: 3 ]
- Long Wave Radio
- The World of LF, by G3YXM reference site for longwave operations. Introduction to operating on 136 and 501 Khz
[ Hits: 624 | Votes: 1 | Rating: 1 ]
- Longwave DXing
- Longwave refers to all frequencies below the lower end of the AM broadcasting band at 540 kHz
[ Hits: 302 | Votes: 0 | Rating: 0 ]
- Longwave Home Page
- The World of Radio Below 500 kHz by the Longwave Club of America
[ Hits: 4877 | Votes: 5 | Rating: 7.4 ]
- Longwave Information
- DK8KW Longwave Information Slow-Voice, Transmitting compressed analog Audio Signals on LF
[ Hits: 237 | Votes: 0 | Rating: 0 ]
- Longwave operations
- In the VLF portion of the spectrum it is easy to listen to the emissions created by the Earth itself. These emissions are generated by many different mechanisms and are often beautiful to listen to. Coverage on LF and MF frequencies
[ Hits: 831 | Votes: 0 | Rating: 0 ]
- Longwave Overview
- Longwave operations in Germany by DF0WD/DL4YHF
[ Hits: 259 | Votes: 0 | Rating: 0 ]
- Longwave Station
- DF0WD DL4YHF Longwave Station include a linear transverter and antenna tuner
[ Hits: 352 | Votes: 0 | Rating: 0 ]
- Low Frequency operations by W3EEE
- A squint at the world of LF
This website was initially thrown together to provide ready availability to data being collected from the measurement of a transatlantic LF (Low Frequency) path.
[ Hits: 469 | Votes: 0 | Rating: 0 ]
- Low Frequency Transmission Modes
- Article by W1TAG on operating modes used on low-banding.
The 2200 meter band (135.7 - 137.8 kHz) is only 2.1 kHz wide, so voice work on SSB or AM is out. Find out the best modes on LF
[ Hits: 436 | Votes: 0 | Rating: 0 ]
- LowFER MedFER HiFER
- What's all this stuff about LowFERs, MedFERs and HiFERs? What Is 'Part 15?'
[ Hits: 674 | Votes: 0 | Rating: 0 ]
- PIC controlled CW BPSK beacon transmitter
- A description of a simple Lowfer beacon transmitter.
[ Hits: 576 | Votes: 1 | Rating: 3 ]
- Propagation on 137 kHz
- Propagation in the LF-Band
[ Hits: 551 | Votes: 2 | Rating: 1 ]
- Radio waves below 22 kHz
- Exploring ULF-ELF and VLF radio band
[ Hits: 1255 | Votes: 6 | Rating: 7.83 ]
- Slow CW Sensitivity
- DK8KW laboratory tests to get some indication about the ability to communicate with signals below noise level using Slow-CW.
[ Hits: 673 | Votes: 2 | Rating: 3.5 ]
- VLF Natural Radio Discussion Group
- Discussion group dedicated to those who enjoy monitoring radio frequencies in the VLF radio spectrum and slightly below the VLF spectrum (3-30 KHz).
[ Hits: 1175 | Votes: 1 | Rating: 8 ]
- VLF Time Signal Broadcasts
- Station List Compiled by William Hepburn, LWCA
[ Hits: 1458 | Votes: 4 | Rating: 4 ]
- VLF-LF And the Loop Aerial
- The article discusses the theory of loop aerials for receiving and how they reduce the level of local noise. A Loop Aerial is described suitable for use on the LF and VLF bands together with a circuit of an interface loop tuner and preamplifier. The discussion extends to the problems of amplifier noise and the advantages of tuning the loop.
[ Hits: 3415 | Votes: 5 | Rating: 5.4 ]
- W1TAG WD2XES WE2XGR/3
- Experimental Stations Run by W1TAG
WD2XES has been used to study LF antenna design, propagation and communication modes. Signals from WD2XES have been copied as far away as Russia.
[ Hits: 391 | Votes: 2 | Rating: 10 ]
- W4DEX Experimental Stations
- WD2XSH Experimental Station (505 - 510 KHz)
WD2XKO Transmitting Station Stanfield,NC operating between 135.7 to 137.8 KHz.
[ Hits: 431 | Votes: 0 | Rating: 0 ]
- WD2XGJ Experimental Station
- Experimental Longwave Transmissions from Tower Hill
wayland Massachusetts
Operator Name Warren, Ham Call K2ORS, Frequency: 137.7796 KHz
[ Hits: 593 | Votes: 0 | Rating: 0 ]
