DESCRIPTION
The Krohn-Hite Model MT56R Matching Transformer is specifically designed as
an accessory to
broaden the amplification range of Krohn-Hite amplifiers, by providing increased
output current
capability and a greater range of output impedance. The Model MT56R may be used
with the Model
7500 amplifiers.
The Model MT56R
provides primary-to-secondary turns ratio of 10, 5, 2.5 and 1.25 to 1, selected
by the 4-position LOAD IMPEDANCE switch. When using the Model 7500 Amplifier,
which has a
200 ohm output impedance, these correspond
to matched loads of 2, 8, 32 and
128 ohms respectively. The operating frequency range is either 30Hz to 10kHz, or 10kHz to 500kHz,
selected by the
FREQUENCY RANGE switch.
Input and output
connections are made to multi-purpose binding posts on the front panel and on
the
rear of the chassis, with separate chassis/grounding terminals on the front
panel to provide for
either floating or chassis/ground operation.
SPECIFICATIONS
The Model
MT56R can only be used with the model 7500 Wideband Power Amplifier.
Frequency
Range: 30Hz to 500kHz in two ranges; 30Hz to 10kHz and 10kHz to 500kHz.
Power Level: 75W with 7500 (slightly less at ends of range).
Power Output Vs. Frequency: See curves for typical outputs into matched
loads with
nominal 75W input from Model 7500 Amplifier.
Harmonic Distortion (rms): See curves for typical distortion with matched
resistive loads
at constant inputs to 7500 Amplifiers.
Matched Loads: 200 ohm input, Model 7500, 2, 8, 32 and 128 ohms.
Controls: LOAD IMPEDANCE switch, FREQUENCY RANGE switch.
Terminals:
Front Panel: multi-purpose binding posts with separate chassis/ground
terminals.
Rear Panel: INPUT BNC, multi-purpose binding posts for output.
Dimensions and Weights: 3.5" (8.9cm) high, 19" (48.2cm) wide, 6.5"
(16.5cm) deep; 21 lbs (9.5kg) net; 25 lbs (11.3kg) shipping.
Accessories: Operating Manual.
OPTIONS
Extended 1 Year Warranty: Part No. EW56R.
OPTIONAL ACCESSORIES
CAB-005:
Cable, Two Conductor Shielded Balance Line
CAB-018:
Cable, Multi-stacking
Double Banana plug
CAB-023:
Cable Set, Low Thermal EMF
Retractable Banana
CAB-024:
Cable Set, Low Thermal EMF Spade
Lug
CAB-025:
Cable, BNC, 3ft, Low Noise
