Miniature view of the MAX626 circuit with wires and capacitors attached to it |
 Larger view of the MAX626 circuit, other side, with wires attached. |
 Only earth/ ground error modification wire TL 497 circuit, emitter Q4 to common earth point on ground of C5 |
 EW904B total component side view, all modifications: I/O290, earth loop correction, TL497 circuit, some pull-up R's, Vpp pull down R's and the A13 modification. A mess, but works great. |
EW904B view zoomed in on the component side, all modifications: I/O290, earth loop correction, TL497 circuit, and A13 modification are visible. |
EW904B view zoomed in on the solder side, all modifications: I/O290, earth loop correction, TL497 circuit, and A13 modification |
Looking through the window of an early 1702 EPROM |
Component side EW904BN board, notice: yellow wire databus diode near mounting bracket, diode changes Vpp, coil oscillation damp components, multiturn pots in place of original pots, and the 220 Ohm A13 pull-up R. |
