Hi Jack, OK for everything. I do not know the Bruhan's VLF converter but I guess I understood how it maybe made. I have used an MC4066 for an SSB demodulator in my modified FT726R. The Ron is very high, on the hundreds ohm. I have also used the 74HC4066 to replace it and also used it as a mixer for a diect conversion rx. This IC has a lower Ron, severan tens of ohms. The Fst3125 presents, usually, an Ron of around 5 ohm, this is important for a lower conversion loss. I would be interested on the circuit diagram od the Bruhan's VLF converter, there is always something to learn.
Thanks and best 73 Gian I7SWX >________________________________ >Da: wa9fvp [via Elecraft] <ml-node+s365791n6896967...@n2.nabble.com> >A: I7SWX <i7...@yahoo.com> >Inviato: Domenica 16 Ottobre 2011 5:18 >Oggetto: Re: K3 H Mode Mixer > > >The reason that I ask is because I have a Bruhan's VLF converter that uses, what he called, a ring mixer. The Burhan's converter has a MC4066 analog switch where the control inputs of two fet switches are inverted and the other two are non inverted. When I saw the schematic of the H mode mixer, it reminded me of the Burhan's VLF converter. The difference is the transformers that Burhans used. They were audio transformers that covered the VLF range. >Jack WA9FVP > >>________________________________ > >If you reply to this email, your message will be added to the discussion below:http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6896967.html >To unsubscribe from K3 H Mode Mixer, click here. > > -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-H-Mode-Mixer-tp6889343p6897764.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
