| Show device that aids corrects weakness of bringing in signals on two places on dial by F ANDERSON in alie hook up herewith presented nn automatic frequency fie quency for lupei heterodynes dynes and at the same time does away with the troublesome double bait that gnp weakness of the in bring in in n at two points on the dial alie oscillator in this caie Is fixed and longware long wave its frequency matched to the transformers chosen capacity impedance bridge Is shown in the diagram referring to the diagram tube n Is lie farst detector and tube A i a tuned radio frequency stige pieced ins it tube C Is the long wave 03 dilator tuned to the peak of alie arins trins foltiner used connected in parallel tubes A and 0 are connected in parallel across alie loop the tuned signal the fraction of alie energy taken by A passes on to the first at radio frequency the fracala the signal energy taken by 0 la i with the long wave oscillations i fore the output of C being ali of the radio frequency long wave frequencies bc aconia onia the desired Jn by manual tuning in the vent lonal super this Is pas to alie first detector B b the pick up I 1 As an example let us say the etive oscillator Is set for co cycles the tuned signal Is 11 COO kilocycles kilo cycles alie fraction pai through A Is liand led at radio quincy alie fraction taun by on the grid of and becomes COO 50 or ic output if based on to the first lector hop output becomes GOO io or SO alie desired tor amp alon n the intermediate freaa transformers i simple method of mixing alie impedance brlej in alie diagram as a sic of alini ml Ini the fixed compo and the signil frequency reaction batteen tt A and C A number ot other r nig feest a ep ratel oscillator or a common ahe quarts suggests aej dilating kid of this automatic cl ingv appa to gunj tuning D longene transformer in its automatic doans away etith the blo bait of the super it sacrifice inherent of the 1 he belt not acm Is onla as selective as its wf 1 or this leaion one or more isep of tuned rf nna bo used ahead etuy to arst detector |
