Нашел решение на буржуазном форуме . http://www.rcgroups.com/forums/showthread.php?t=1005309 page=64#post19639890 Finally

Нашел решение на буржуазном форуме .

rcgroups.com/forums/showthread.php?t=1005309&page=64#post19639890

"Finally after several attempts to get the supply to hold voltage with load I believe I have the answer. Instead of jumpering pins 30, 31 and 34 together just jumper 34 to 31 and tie pin 30 to +12V. So far I can now load up to 45 amps and the output drops just 100mv (12.9V to 12.8V). I do believe I will have a double gin and tonic to celebrate. I had almost given up and tossed the supply. Now I hope I can get more as I believe this is one nice compact supply capable of delivering 65 amps. I plan to series up a couple for 24V which be a piece of cake seeing as the negative is not tied to chassis ground."

Еще одно интересное решение для аналогичного блока ( DPS-700EB), поднимает до 15 В

rcgroups.com/forums/showpost.php?p=18908291&postcount=844

P.S. Очень интересный ресур там кстати

Вот, еще там нашел. Буду пробовать вечером

rcgroups.com/forums/showthread.php?t=1005309&highlight=dps+800gb&page=93

I think pins #32 and #33 (at outer edge on top and bottom) are good candidates to try, tho I haven't seen these pins mentioned earlier in the posts about DPS-800GB.

When PS is on, pin#32 floats just a little under Vout, and the other one #33 just slightly above 0V (0.08V).

About pin #30: When disconnected from +12Vout, the output decreases,
also with a resistor to +V as well as GND.
The highest output is achieved with a jumper wire staight from pin#30 to +12Vout.

Edit:
After some experimenting, I found the following circuit achieves an increased, and adjustable output Voltage. With my DPS-800GB PS, I could adjust the +Vout from 12,8 to 14,4V. At 14.45V the OVP kicks in.
Regulation is still outstanding (+/- 100mV from zero to full 85Amp load at 13,6V)