Thursday, February 27, 2014

Jensen Ultraflex redux

A few updates to the Jensen Ultraflex
Revised crossover + EQ/HF boost 
 The fixed resistor attenuator was inspired by the Jensen Duette crossover + recent knowledge gained in boosting frequencies above 7khz using an EQ network in my Altec 2-way XO experiments. Try it on your Heathkit SS1 or Eico HFS1 which AFAIK, used only a 2uf beeswax paper cap + L-pad.

Damping removed
paper in oil caps for
crossover and EQ
Happy Listening!

Sunday, February 16, 2014

de Forest 410 Mesh Plate




I've been feeling nostalgic lately especially after unearthing a box of prints and negatives which I've been scanning and uploading in the Arkiv.