Juma Details

     The Juma amplifier is a single ended amplifier with three power tubes in parallel.  Output power ranges from 18 to 36 watts depending on what power tubes you install.  There are no electronic adjustments to be made for tube swaps, this enables you to try many different combinations of power tubes.  6V6, 6L6, KT66, KT88, 6550, 7581 and EL34's to mention some of the more common power tubes that can be used.  You are not limited to using all the same tube either, you can mix and match for endless tonal colours.

    There are three controls on the Juma ;  Volume, Treble and Bass.  Pre-amplifier tubes can also be swapped for different tones as well.  The rectifier tube controls the touch responsiveness of the amplifier and that too can be swapped for many different feelings.

     The Juma is constructed with top quality parts in a point to point manner with .999 fine Silver wire.

      The concept of using two chassis is to isolate 60 Hz AC hum from the audio section.     The Power Chassis takes in AC  or Alternating Current from the wall.  This carries with it a 60 hz hum.  The AC is then converted to DC or Direct Current.  The power is then run cleanly through a shielded umbilical cord to the Audio Chassis. By running everything in the Audio section on DC, we eliminate the hum interference from the speakers.

      The Juma amplifier is separated from the speaker cabinet with isolation cones.  To minimize speaker vibrations to the amplifier.  The speaker cabinet houses a pair of 12" Celestion Alnico Blue  'Bulldogs'.  We used Alnico for its musical attributes.  The speaker enclosure is sealed and damped for lower end extension.