Tuesday, November 26, 2019

Fitting a Headway

Over the last week or so, I’ve had Robin’s mandolin set-up and playing. I felt that having a flat-top and carved back was somewhat experimental, but I’m very happy with the way it sounds and will have to post a video for you when it’s completely done.
Anyway, having had the mandolin strung-up and being fully confident that it’s settled, it’s time to fit the Headway under saddle transducer.
Firstly, the bridges position is accurately marked out using tape. Then the tension can be taken off the strings and the bridge removed.
The transducer itself is just over 2mm in diameter, so the appropriate amount has to be taken off of the bottom of the saddle. The depth of the saddle is carefully marked with a pencil and the transducer inserted into the bridge. The bottom of the saddle is sanded until the pencil line is level again with the top edge of its slot.
Next, the transducers hole is marked out onto the soundboard. I always put a piece of tape down where I’m drilling- the woods winter growth is much harder than the summer growth and this difference in density can throw a small drill off course- the tape limits that movement.
Once you’ve drilled the hole, the fun part is working blindly to get the transducer through it. I like to use some green garden wire, poke it through the hole, attach it to the end of transducer with some cellotape and the pull it through the soundboard.
Then everything can be reassembled and the pick-up tested.
The Headway has an internal pre-amp which is powered by a PP3 battery. You’ll notice that the battery is outside of the mandolin. In my opinion, the small soundhole and moveable bridge makes fitting a battery inside one of my mandolins impractical. Fortunately, you can power the Headway with phantom power via one of their external pre-amps and do away with the battery; this is what we’re doing with Robin’s.
Next step-take it apart and get polishing!

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