Alberto: We had a curious question to occur regarding the use of a Local Oscillator mixer signal where the i.f. is already low. I have a Hallicrafters receiver and the last i.f. frequency is 50 kHz. In this case if I used a transformer such as Rick Campbell used to split and phase shift his vfo in his little receiver would I have to still use a mixer signal with the 50 kHz signal in this scheme?
I will explain it this way, I want to place the transformer on the 50 kHz output to split and 90 degree phase shift the i.f. and then send that to a sound card. Do I still need a 50 kHz mixer signal to mix with the 50 kHz so I can have sum and difference mixer products? Even though this transformer is suppose to split and phase shift the signal? I do not know but the sum and difference frequencies that the local oscillator add to the mixing seem to be important here. I can do an experiment here soon to check. But as a designer of the software you know more about this and the ideas for quadrature detection. What would you be looking for in an ideal signal to your sound card? Dan _____________________________________________________________________ Call Anyone, Anytime, Anywhere in the World - FREE! Free Internet calling from NetZero Voice Visit http://www.netzerovoice.com today! Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
