Useful links
Antennas, ground systems
Antenna matching, loading coils
Books, magazines
Commercial rigs
Measuring
Modes, modulation
Operating
Personal sites #
Propagation
Receiving
Software
- Argo (I2PHD) A DFCW and QRSS viewer
- Freeware for radio amateurs (DL5WSB, sk) Mini Ring Core Calculator, mini dB Calculator, ...
- Opera (EA5HVK) Opera receiving and transmitting software
- QRS (ON7YD) QRSS & DFCW transmitting software
- SlowJT9 (ON7YD) Supports the slow JT9 submodes (JT9-2, JT9-5 and JT9-10) as well as JT9-1
- Spectrum Lab (DL4YHF) Audio spectrum analyzer with waterfall display, for QRSS & DFCW reception
- Winrad (I2PHD et al.) SDR amateur radio program
- WSJT-X (K1JT et al.) FST4(W), FT4, FT8, JT4, JT9, JT65, Q65, MSK144 and WSPR receiving and transmitting software
- WSPR (K1JT) WSPR receiving and transmitting software
- WSQ (ZL2AFP, DL4YHF) WSQ2 receiving and transmitting software
Transmitting
- +28 dBm linear driver (WB4JWM)
- 0-500 kHz linear exciter (VK2XV)
- 1W QRP QTX (GW3UEP)
- 100 Watt CW transmitter for the 500 kHz band (N4ICK)
- 100 Watt MF CW TX (GW3UEP)
- 137/472 kHz transmitter (W1TAG)
- 225 Watt 630 meter non-linear amplifier (WB4JWM)
- 25 Watt 472 kHz PA (GW3UEP)
- 28 MHz to 472 kHz QRP transverter (DL8YCA)
- 4 watt class A amplifier (WB4JWM)
- 400 watt FET amplifier for 630 meters (W7IUV)
- 472 kHz 25W PA (GW3UEP)
- 472 kHz transmitter (M1GEO)
- 472 kHz transverter (G3XBM)
- 472 kHz VFO (GW3UEP)
- 472-479 kHz QRP linear amplifier & RX-preamplifier (DL8YCA)
- 475 kHz 7 pole elliptical low pass filter (VK5FQ)
- 475 kHz 40 W linear amplifier (DL8YCA)
- 500 kHz Class-D 500-Watt RF deck (W1VD)
- 500 kHz CW transmitter (M1BMU)
- 500 Watt output 4-400A linear amplifier for 600 meters (W5JGV)
- 630 m 100 watt transmitter (VK5FQ)
- 630m 200W PA (DL0ABR, German language)
- 630 m 5-15 W amplifier (IW3SGT)
- 630m 500W Class-C PA (DL0ABR, German language)
- 630m 800W Class-C PA (DL0ABR, German language)
- 630 m low power transmitter (VK5FQ)
- 630m Transverter using a bidirectional bigh-power mixer (VE7CNF)
- 630 m Wilkinson power combiner (VE7SL)
- 6AG7/807 transmitter for 472 kHz (VK1SV)
- A 100 to 200 watt linear amplifier (WB4JWM)
- A 300 W Class D amplifier for 630 m (G0MRF)
- A 630 m transverter (VE7CA)
- A simple amplifier for the Ultimate 3 for 136 & 472 kHz (HB9ASB)
- A small 'linear' power amplifier for MF (DL4YHF)
- Broadband 5 watt amplifier for LF and MF (G0MRF)
- Class E Power Amplifier Design (G3NYK, GW4HXO, EI0CF)
- HF to LF/MF linear transverter with 500 kHz Class D EER power amplifier (M0BMU)
- LF/MF, flexible, efficient, non-linear, transmit converter (VK1SV)
- Long-waves and medium-waves dual-band kilowatt CW transmitter (HB9DUL)
- Medium power linear power amplifier for LF/MF (G4JNT)
- Modifying an IC735 for the 630 m band (SQ5BPF)
- SoftRock RXTX - Modification for 2200, 630 and 160 metre operation (VE7VV)
- SWR protection circuit for FET amplifiers (WB4JWM)
- Third-Method Narrowband Direct Upconverter for the LF / MF Bands (G4JNT)
- Transverter for the 630 m band (VK6YSF)
- Using the Ultimate 2 on 472 kHz with an external PA (G8AGN)
- VXO controlled transmitter for the UK 500 kHz Experiment (G3YMC)
Web
Other
The missing link
Do you know one or more links that should be in the above list? Feel free to contact .
Broken links can be reported to the same e-mail address.
*: Can be used for 630 m as well.
#: Do you want your personal site added? Just let me know ( ). The only conditions are that the site is not commercial and at least partially related to 472 kHz.
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