R151 with 5 mA Clamp Loads
<UL>
<LI><b>S151A</b> is a drawing of DEC's S151A.</LI>
<LI><b>S151B</b> is a drawing of DEC's S151B.</LI>
<LI><b>S151D</b> is a drawing of DEC's S151D.</LI>
<LI><b>S151X</b> is a 'modernized' S151.</LI>