Randall_RD50_FORTIN_+_ECN_0222312 电路图.pdf

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1、 ELECTRONIC CHANGE NOTICE RD50H RD50C - #ECO-1 02/23/12 Instructions: 1. Jumper R1 with a 10K 1/4w carbon film resistor 2. Change C5 to a 0.68uf/50v electrolytic capacitor 3. Change C7 to a 0.0022uf/600vdc film capacitor 4. Remove C10 5. Change C12 to a 0.0047uf/600vdc film capacitor 6. Change C11 t

2、o a 0.68uf/50v electrolytic capacitor 7. Add a 470pf/1kv ceramic capacitor in parallel to R15 8. Add a 1000pf/1kv ceramic capacitor in parallel to R22 9. Add a 470K 1/4w carbon film resistor in parallel to R35 10. Add a 15K 2w flame proof resistor in series with R14 11. Add a 15K 2w flame proof resistor in series with R24 All components can be removed from the top side of the pcb. RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库