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492 kHz Projects - Transmitters

1W MF CW QTX by GW3UEP
Simple Quick-Start 1W MF TX.
Developed with GW4HXO, EIØCF & EI6DN.
http://www.gw3uep.ukfsn.org/QRP%20QTX/QRP_QTX.htm

472 kHz Transmitter by M1GEO
The output from this amplifier is small (around 980mV unloaded, about 290mV into 47Omega). The scope trace below shows what the DDS-60’s output looks at 472 kHz. The sinewaves are a little flat-topped but this doesn’t matter as it’s only at the driver stage.
https://www.george-smart.co.uk/radio/472_khz/472_khz_transmitter/

472-479 kHz CMOS VFO for 100W QTX PA by GW3UEP
Simple stable low-cost VFO.
http://www.gw3uep.ukfsn.org/100W_QTX/472_kHz_vfo.htm

6AG7/807 transmitter for 472 kHz by VK1SV
No commercial radio amateur gear currently supports 472 kHz for transmitting, so a transmitter has to be built from scratch. I selected to build a transmitter using valves.
http://people.physics.anu.edu.au/~dxt103/valves/807-472kc/

The GW3UEP 630m TX In QRSS Mode by VE2SL
By all accounts, the little transmitter designed by GW3UEP and detailed on his website, is an efficient performer and would be a great 'first' rig for 630m CW.
http://ve7sl.blogspot.com/2014/06/the-gw3uep-630m-tx-in-qrss-mode-by-all.html


Creation date : 23/09/2018 @ 16:44
Last update : 23/09/2018 @ 16:44
Category : 492 kHz Projects
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