This "L" Series of Tube Amplifier Kits and two add-on kits that are easy to build, sound great, and are just fun! These Kits utilize a 5670 dual triode tube and 6005 pentode tubes. The amplifiers have built-in volume control so that they can be driven directly from a CD player, tuner, etc. If more gain is needed to drive the amplifier a Pre amp Kit can be added to the amplifier, the pre amp can be configured for a gain of 10 to 30 db. The amplifiers come with a robust power transformer that can be configured for either 120 or 240 volts, 50 to 60 hertz.

Each kit comes complete with resistors, capacitors, tubes, connectors, circuit board, transformers, and all necessary hardware to mount on the provided "bread board".

If you have built one of our other kits you will notice that the simple but good design has followed over to these. We have had requests for other configurations to our original amps which we tried to incorporate into this series.
Note: The tube sockets are ceramic.
 
Model 8LM Mono Integrated Tube Amplifier
This Integrated Tube Amplifier is designed for 8 watts into 4 to 8 ohm speakers.

Model 8LS Stereo Integrated Tube Amplifier
This Integrated Tube Amplifier is designed for 8 watts per Channel into 4 ohm speakers.

Model 16LM Mono Integrated Tube Amplifier
This Integrated Tube Amplifier is designed for 16 watts into 4 ohm speakers.

Model 16LS Stereo Integrated Tube Amplifier
This Integrated Tube Amplifier is designed for 16 watts per Channel into 4 ohm speakers.

  Common Specifications:
        Input Impedance = 100k ohms
        Output Impedance = 8 ohms
        Output = Push Pull
        The circuit is a Class A amplifier
        Minimum Input for full output = .4 V
        Frequency Response = 20 to 20,000 Hz
        Total Harmonic Distortion at 1 Watt <1%

Model PL Pre Amp
This is an add-on module with inter-connections to a series "L" amplifier, that can provide additional gain for inputs like a microphone or other low level output devices.
It may be added on at the time of assembly of your amp or at a later date. It may be used with either a mono or stereo amplifier.

Model PH Phono Pre Amp
This is an add-on module with inter-connections to a series "L" amplifier, that can provide additional gain for a Phono graph turn table, it incorporates a RIAA filter to compensate for the output curves of most Phono cartridges.
It may be added on at the time of assembly of your amp or at a later date. It may be used with either a mono or stereo amplifier.

Model TL Tone Control
This is an add-on module with inter-connections to a series "L" amplifier, that can adjust the tone with a base and a treble control.  It may be added on at the time of assembly of your amp or at a later date. It may be used with either a mono or stereo amplifier.


CautionThese Kits may be operated as supplied, however voltages in excess of 240 volts are present on the board and the tubes get very hot. It is advised that the amplifier be mounted in a well-ventilated metal enclosure to reduce the potential of fire or shock.



The "L" Series  TUBE AMPLIFIERS
8 & 16 Watt  INTEGRATED
STEREO & MONO Versions

    Page Updated January 2017