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The other thing about superregens is that they quite easily become unintentional transmitters.
by mkarliner 3y ago
The other thing about superregens is that they quite easily become unintentional transmitters.
- buescher 3y agoThe fcc used to require certification of commercially produced superregens for this reason. Neither of these radios appear to be superregens though.
- rpaddock 3y agoThere were two articles in QST on using an HP Opto Coupler (that part is now obsolete, probably are modern alternatives) to isolate the antenna form the oscillator so it could not become a transmitter. See: Daniel Wissell, N1BYT, “The OCR Receiver,” QST, Jun 1998 and "The OCR II Receiver" QST, Sep 2000. Since the search engines have gone AI finding things like the June 1998 issue of QST has become impossible, for me at least. Maybe you have better search fu? The schematic of that article is reproducer in this HP/Agilent App Note: "Overview of High Performance Analog Optocouplers" http://promvpk.ru/Catalog/Document/5097b0fb118d6519949fe8a3 http://promvpk.ru/Catalog/Document/5097b0fb118d6519949fe8a3 QST screen shot of shcmatic: https://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/40m_OCR_Regen_RX_N1BYT.gif https://www.qsl.net/va3iul/Homebrew_RF_Circuit_Design_Ideas/...