Packard-Bell-Co-4RB1 电路原理图.pdf

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1、VOLUME R-17, MOST-OFTEN-NEEDED 1957 RADIO SERVICING INFORMATION MODEL 4RB1 PORTABLE BATTERY RADIO v-t /RS (couve&rR) I. L-3 zsoez RflOK Tc4 LZ 1/-2 fU4 (TuJ L-4 a/MM/Ctp) 23083 V-3 W5 (oer ? audio) 2 /5 V /00J Jj J_/OK t-J /T c.too V-4- 3S? (output) c/z 3 si/ svve J.C3 OSC CO/L.LZ 3,3 M VOK ffEO/cor

2、 Z-r TRAMS FORMER TERMINALS kl/IURERED CLOCKWISE BEG/UAI/UG W/TH ov REFERENCE SYMBOL L DESCRIPTION PART M CAPACITORS B) Variable, 2-gang B)j with trimmers Ceramic, 10,000 mmf, GMV (% in. diometer) Ceramic, 47 mmf, 20% Same as C-3 Ceromic, 2000 mmf, 20% (% in. diometer) Ceramic, 100 mmf, 20% Same as

3、C-6 Same as C-3 Same as C-7 Some as C-6 Some as C-6 Electrolytic, 10 mfd, 50 volt RESISTORS All resistors one-quarter (V4 ) watt. PACKARD-BELL PART NUMBER R-1 100,000 ohms, 20% 73949 R-2 3.3 megohms, 20% 73967 R-3 4.7 megohms, 20% 73969 R-4 47,000 ohms, 10% 73845 R-5 Variable control, volume with switch, 1 megohm 25041A R-6 10 megohms, 20% 73973 R-7 Same os R-3 R-8 1 megohm, 20% 73961 R-9 Same os R-2 R-10 470 ohms, 10% 73821 INDUCTANCES L-1 Ferro-loop ontenna 29354 L-2 Oscillotor coil 29232 L-3 First l-F coil 29082 L-4 Second l-F coil 29083 91 收音机爱 好者资料库 RadioFans.CN