Converter Model Identification and operation?

[Madathlon]

ok So my D20 has this old converter ( I hope its is one at lest )

First question what model is it.

Second Question is How do I use it properly.

[smg id=3395]


[smg id=3394]

Thanks for you help friends

[tomr]

It's likely a Progressive Dynamics 690 series. There's a plate on the right side near the rear.
See http://www.progressivedyn.com/service_discontinued/pd694-1%20manual.pdf

Tom

[Madathlon]

Thanks big time