D.W. Fearn VT-4 - Manual (Page 15)

24 D.W. Fearn VT-4 Vacuum Tube LC Equalizer
Rotary Switches
The rotary switches in the VT-4 were chosen for their self-cleaning property. In a clean
environment (non-smoking, with frequent room and equipment vacuum cleaning), and
with regular use, the rotary switches should require little attention for years. But if clean-
ing becomes necessary, we recommend using De-Oxit (Caig Laboratories). Follow the
instructions provided with the product.
If the switches are not used regularly, oxide and dirt can build up on the contacts. Rotate
the switches through their range a few times on a weekly basis to keep them clean.
Warranty Repair
If the VT-4 should develop a problem during the five-year warranty period, call the fac-
tory for return shipping instructions. We will repair and return your VT-4 quickly. Note
that the warranty does not cover vacuum tubes, which must be periodically replaced.