Fernandes Sustainer Power Mod

I was wondering if I could power my Fernandes Dragonfly Pro sustainer with a standard DC power adapter. I have a box full of 9vdc adapters. I chose a "center-pin-negative" power adapter from my box and tested the voltage and verified polarity.

Fernandes Battery Connector Adapter

I cut the connector from the power adapter. I happened to have a spare battery connector sitting around which I used for this test. Using the following diagram, I soldered the connections, taped the bare connections so they wouldn't short together or against anything else.

To test the adapter, I snapped the battery connectors together (neg to pos and pos to neg) which reverses the polarity, and plugged the instrument cable in to the guitar's output jack. The LED lit up nice and bright, so I braved turning the amp on... After the tube filaments heated up, I was pleasantly surprised that my Fernandes Dragonfly Pro was operating perfectly on the new 9vdc power adapter. No more changing batteries in my guitar!