R2 due for release soon
We're pleased to bring your our take on battery tubes. Two years in development with numerous design changes and tweaks.
The easiest method to solder the wires in place is to use pre tinned wire, use a little flux on the wire first then just solder direct using plenty of solder. Themal mass shouldn't be an issue depending on your soldering iron but its better to use more heat and less time rather than a lower temperature and dwell too long.