22-02-2016, 09:58 AM
Yes, might have to re think the strategy, maybe a homebrew Polyakov mixer or a homebrew single balanced mixer could be incorporated into a valve receiver, the first DC receiver I built many moons ago was based on Spaargaren's design (Fig. 8):
http://www.epanorama.net/sff/Radio/Commu...rt%201.pdf
That one worked quite well as I remember, it might be adaptable to a valve receiver.
Another idea would be to use a valved single balanced valve mixer based on the CW detector used in the Marconi Atlanta shown in the schematic and in more detail in appendix 2:
http://bee.mif.pg.gda.pl/ciasteczkowypot...ual_v6.pdf
All yap at the moment though 'till I can get some bits together.
Lawrence.
http://www.epanorama.net/sff/Radio/Commu...rt%201.pdf
That one worked quite well as I remember, it might be adaptable to a valve receiver.
Another idea would be to use a valved single balanced valve mixer based on the CW detector used in the Marconi Atlanta shown in the schematic and in more detail in appendix 2:
http://bee.mif.pg.gda.pl/ciasteczkowypot...ual_v6.pdf
All yap at the moment though 'till I can get some bits together.
Lawrence.
