It's really pretty easy to do it yourself. All you need is some resistors, a screwdriver and a multimeter. I did mine today and it took less than an hour and I am not what one would call handy.
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The dyna jet 707 is really a B&K 707 tube tester. Dyna Jet is a propriatory name for the upper half of the tester. The manual can be had here: ftp://bama.sbc.edu/downloads/b&k/707/ You will need the plugin to read .djvu files which can be had from here: http://www.lizardtech.com/download/dl_download.php?detail=doc_djvu_plugin&platform=win |