This is a beautiful Wavestream Kinetics Deluxe Phonostage. It is in excellent condition and those familiar with Scott Frankland’s designs know just how special a phonostage this is.Three of the most useful specifications are impedance, gain, and noise. The Phonostage output impedance is 200 ohms. This is achieved without a cathode follower (buffer stage). A 200 ohm output impedance allows the Phonostage to drive long runs of cable with negligible effect on frequency response. The Phonostage input impedance is 47k ohms, adjustable downward to any desired value by means of external loading jacks. This infinite flexibility is important for optimizing the damping of moving coil cartridges, for which the Phonostage is solely intended. Cartridges with outputs above 1.2mV should not be used, as these can cause phono overload (distortion on peaks). The useful cartridge range is therefore 0.2mV to 1.2mV. Given this range of input voltage, the Phonostage gain has been optimized at 60dB. This is 1000 times the input voltage. For example, with a 0.25mV cartridge, the Phonostage output will be 250mV (1/4V); which is widely considered to be standard line level in recording studios. In addition to high gain, the Phonostage is designed to be 2-3 times quieter than conventional tube phono stages. There are four reasons for this extra quietness: 1. The parallel cascode input stage; 2. Power supply noise below 1uV (one-millionth of a volt); 3. Low noise resistors; 4. Decoupling of the audio board from the chassis. All of which simplifies tube selection, in that almost any reasonably quiet tube will give good results, from off-the-shelf to NOS. Call Jonathan Tinn at (503) 868-0500 with any questions. Paypal accepted domestically, just add 3%. International buyers, I will only accept wire transfers.
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