FREMODYNE RADIO

http://members.iinet.net.au/~cool386/home_frem/home_frem.htm

http://www.vk2zay.net/article/245

http://www.w7ekb.com/glowbugs/rx/Regens/regens.htm

http://oldradios.co.za/projects/39-radios/58-1-valve-fremodyne-vhf-receiver.html

http://www.webalice.it/vittorio_i3hvs/radio%20a%20reazione/fremodyne.html