TRC-457 SERVICE MANUAL

[old number 7]

Hi in the. Power supply I used 4300 uf cap I tried to use audio quality caps nichicon gold in the audio section.. C 179 is ais a tantalum 2.2uf 16 v replace it with a 25 or 50v 2.2uf tantalum or electrolytic in the back. Of the radio by vr7 there a resistor in place of D23.. place it with a diode.. In34a or nte 109 or nte 110 to open up the audio without disabling the cliffing circuit... Check R161 56 ohm 1 watt if itooks like it headed up replace with a 2 or 3 watt carbon risistor 56 ohm 1 %

Thanks . Right Now Just waiting on The kit from Klondike Mike . Going to Start with the Power Supply Section , I noticed The radio going off frequency when I talk . going to check and see if The power is dropping on the rail . and if Recapping with fix that .. I will Let you know how I make out

 

[Copycat32]

Thanks . Right Now Just waiting on The kit from Klondike Mike . Going to Start with the Power Supply Section , I noticed The radio going off frequency when I talk . going to check and see if The power is dropping on the rail . and if Recapping with fix that .. I will Let you know how I make out

The external ninline freq counter will bounce all over with modulation it's normal check with dead key.. If it's wired into the radio to the pll section then it should stay stable