Philco-Radio-and-Television-Corp-T-74 电路原理图.pdf

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1、VOLUME R-21, MOST-OFTEN-NEEDED 1961 RADIO SERVICING INFORMATION - _ _ T - IQQ7 PHILCO PORTABLE RADIO TRANSISTOR MODEL T-74, CODE 124 Z 7* SHi r a (fTl TRB T iQQO AUDIO DR VER RHONE JACK-FRONT BLKiw As-reo TRI T-IS02 LAI (SEC.) CONV f dfej L s ; U m i r * SIGNAL GENERATOR STEP CONNECTION TO RADIO iUJ

2、H 3 DIAL SETTING SPECIAL INSTRUCTIONS ADJUST 1 Connect signal generator through a .1-uf. condenser to ant. section of gang. 455 kc. Tuning gang fully open. Adjust for maximum output in order given. Z33rd i-f Z22nd i-f Z11st i-f 2 j Use radiating loop. (See NOTE 1 below) 600 kc. 600 kc. Adjust for ma

3、ximum output. Rock tuning gang while mak ing this adjustment. T1osc. core 3 Same as step 2. 1620 kc. 1620 kc. (Tuning gang full;- open) Adjust for maximum output. ClBosc trimmer 4 Same as step 2. 1400 kc. 1400 kc. Adjust for maximum output. ClAantenna 5 I Repeat steps 2, 3 and 4 until no further improvement is obtained. Always stop on step 4. NOTE 1. Use a 6*to-8-turn, 6-inch-diameter loop made up of insulated wire. Connect to generator terminals, and place about one foot from radio loop. 119 收音机爱 好者资料库 RadioFans.CN