[Swan] Late 500c, 3 position mode switch?

[Dean Billing]

Looked in the archive, saw nothing about this.

I am the proud new owner of a slightly used Swan 500C, s/n I 245815. 
 I'm beginning to find out this is a weird model.  I have a 3 position 
mode switch, but it only has 15 tubes, no V-14 carrier oscillator, hence 
no OA2 regulator. I got a manual from W7FG but it has a 17 tube 
schematic.  I got a schematic for a 500cx, it has 15 tubes, but it has a 
5 position mode switch.

Does anyone have the manual for this model?  Especially need schmatic.

73's -- Dean Billing  WA6IKJ
           Sisters, OR