The Atlas 180 and 21x series


Here are Diagrams PC100-PC400.

Link to Diagrams PC500-PC1000.

See also the main chassis diagram.

To save any of these diagrams, right -mouse-click on it and choose "save picture as..".

The block diagram, click on it for a bigger view.

Block diagram

PC100 card circuit. First Mixer, first I.F.

First Mixer and first IF

The parts list

PC200 card. 2nd IF, 2nd mixer, mic amp and s-meter amp.

2nd IF

The parts list

PC300 card. Rx audio, oscillator and switch.

Note: The numbering is reversed from that on the chassis plan!

rx audio and tx/rx switch

The parts list

PC400. VFO.

VFO circuit

The parts list

Link to Diagrams PC500-PC1000.