Herron VTPH1-MC usedGreat phono preamp! VTPH-1MC Plus moving coil version - same as MM version with additional F.E.T. front end amplifier Design Considerations All tube signal path (moving magnet ver...1950.00

Herron VTPH1-MC Phono Preamp

Listing ID: LIS30F03 Classified 
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rbgc 

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Condition
9/10
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Ships fromSan Antonio, TX, 78217
Ships toWorldwide
Package dimensions22.0" × 15.0" × 10.0" (15.0 lbs.)
Shipping carrierunspecified
Shipping costSpecified after purchase
Original accessoriesBox, Manual
AverageResearch Pricing

Great phono preamp!

VTPH-1MC Plus moving coil version - same as MM version with additional F.E.T. front end amplifier

Design Considerations

All tube signal path (moving magnet version)
Passive RIAA equalization
Star grounded
Zero feedback
No switches in signal path
Gold plated TIFF ground and RCA connectors
Reversing line polarity switch
Controlled warm-up (filaments and high voltage) for extended tube life
Low plate operating currents for extended tube life and cool operation
Audio path capacitors are polypropylene and polystyrene
Hand picked components for accurate response
Automatic muting at startup and shutdown
Toroidal power transformer
Rugged all-1/10 inch thick aluminum chassis, 1/4 inch thick faceplate
Front panel indicators for power, filament voltage, and output mute release
Each unit given a 48-hour burn in, including rigorous bench and listening tests

Specifications
Tube complement 4 x 12AX7, 1 x 12AT7
Frequency response RIAA 1 Hz to beyond 100 kHz, 20 Hz to 20 kHz ±0.1 dB
Gain VTPH-1MM 44 dB nominal at 1kHz, channels matched to within 0.05 dB
VTPH-1MC Plus 66 dB nominal at 1kHz, channels matched to within 0.05 dB
Signal-to-Noise Ratio VTPH-MC Plus 80 dB, A weighted, inputs shorted, AC polarity set
Output impedance 500 ohms nominal
Input impedance VTPH-1MM 47,000 ohms, 100 pF
VTPH-1MC Plus 47,000 ohms, 100 pF, plus optional internal load resistors at the input terminals
Absolute polarity VTPH-1MM non-inverting
VTPH-1MC Plus non-inverting
Power supply 78,000 µF of energy storage
4 levels of high voltage regulation
Regulated soft start DC filament supply
Regulated tube bias supply
Input capacity VTPH-1MM up to 300 mV at 1 kHz, 1 volt at 10 kHz nominal (output unloaded)
VTPH-1MC Plus up to 30 mv at 1 khz, .1 volt at 10 kHz nominal (output unloaded)
Overall dimensions 19" wide x 3.5" high x 10" deep

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