[Heathkit] Seeking DX-100 B Manual

[Andrew Kopke]

Hello Group , I aquired a DX 100 B and am looking for a souce for a proper manual or direction to find one . 
I understand there are some wiring differences between the a and b models .Also, mine seems to have the official push button mod for freq spotting and improved keying . I am a newbie to troubleshooting and might seek a local ham to help.
 
Many Thanks and Happy New Year
 
Andrew