Model PH
"L" Series
8 Watt Stereo Amp with Phono Preamp
Here is a Stereo Tube Phono Preamplifier Kit  that is easy to build and is just fun!  The Phono Preamplifier utilizes two 5670 triode tubes.  It incorprates an RIAA filter to compensate for the output curve of most Phono cartridges.

The Phono Preamplifier is compatible with all "L" Series Amplifiers. It gets its B+ and filament voltage from the Amplifier board and can provide 10 to 30 db of gain.

The PH Stereo Tube Phono Preamplifier comes in kit form (K-PH).  It has all the resistors, capacitors, tubes, circuit board, and necessary hardware for mounting on a "bread board" provided (which is compatible with the amp you purchase or have previously purchased).

NOTE:  The Phono Preamplifier, Preamplifier and Tone Control kits cannot be used together as they each have gain.

   Page Updated June 2017
Model PH Stereo Tube Phono Preamplifier

   Input Impedance = 47K ohms
   Frequency Response = 20 to 20,000 Hz
            with RIAA internal filter
   Input = RCA phono connector
   Output connections =  Jumpers to Amplifier PC Board
   Gain = 10 to 30 db - set by resistors
   Two channel  

CautionThese amplifiers 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.
   If ordering separately specify which kit you already have, so we
   can furnish the correct mounting board.