Zenith-Radio-Corp-6D014 电路原理图.pdf

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1、MANUAL OF 1947 MOST-OFTEN-NEEDED RADIO DIAGRAMS Zenith Radio Corp. MODBIS 6D0146D029 CHASSIS No. 6C01 ALIGNMENT PROCEDURE CONNECT DUMMY OSCILLA.TOR TO ANTENNA 188 TUBE AND TRIMMER LOCATION Chassis 6C01 features a high gain tuns& R.r. circuit ahead of a OMirentlondl superheterodyne circuit, vlth feed

2、* hack In the audio circuit, and s new filter circuit to re duce huB to a BlnlBUB. Pert of the audio roltage froB the roles coll Is fed hack to the first audio grld(12SQ7) In phase throu resistor RIO and R7 to a tap oo the toIubs control r6. Capacitor C15 hypassss highs to ground. One elds of the ou

3、tput transforaier Secondary Is grounded. The side grounded deterednes the phase rslatlmuhlp of the fssdhaok roltage, therefore, when replac ing the output transfomer he certain the proper end of the secondary la grounded or degeneration will result. The orer- all result of this arrangSBent Is to boo

4、st the base tones. The filter circuits of chassis 6C01 Inccrpcrats new features that should be well understood by the serrlcs Ban. An sxaBinatlMi of the scbeoatlc drawing will show the output transferasr tapped slightly off center. This tap Is the B connection froB filter resistor Rll and capacitor

5、C80 off the cathode of the rectifier 35Z5 to the 35L6 plats. The lower connection of the output transforBsr feeds to the rest of the tubes In the rscslrer. Current flowing through the upper windings of the output tranaferBsr to the 5l6 produces a aaistlc field irtilch Is 180 out of phase with the Mg

6、nstlc field produced by current flowing In the opposite direction through the output transforaer to the rest of the recslrer, therefore, aost of the AC hUB Is cancelled. Further reduc tion of huB Is accoB9llshed by filtering through rsslstcrs R18 and R13 and capacltcsrs Cl8 and C19. This derslopaent In filtering system allows a higher effsctlre plats roltage mi the for Increased power out put. 收音机爱 好者资料库 RadioFans.CN |.RFKEQUeNeY KC. TUMtNC RANGE RC. 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN