Camtech P101

Data

General

• Manufacturer: Cambridge System Technologies (CST) - in Germany distributed by Püllmanns under the brand Camtech (otherwise Audiolab)

Model: P101

• Years of manufacture: early to mid 90s.
• Made in: England

Color: Black

• Type: Stereo/Analog
• Remote control: no
• Power consumption: 20/480W (idle/volume)
• Dimensions: 45/8/33 width/height/depth (cm)
• Weight:approx. 9 kg
• Original price approx.: 2650 DM (according to STEREO 6/1991)

Connections

• Number of inputs:
  • 1 x Stereo Input (700mV / 50kOhm ||400pF).
  • 1 x Stereo Load
• Number of outputs:
  • 2 x Output left
  • 2 x Output right

Technical data

• Continuous power (at THD)
  • 8 Ohm: > 100/120W (0,1%/1,0% THD+N)
  • 4 Ohm: > 150W (1,0% THD+N)
• Dynamic power
  • 4 Ohm: > 250W

2 Ohm: > 350W

• Total harmonic distortion: max. 0.1%
• Attenuation factor: 0.02 Ohm at 40Hz
• Frequency response: 20Hz - 20,000Hz max +/- 0.3dB; 3Hz - 100,000Hz max +/-3.0dB
• Signal to noise ratio: > 115 dB
• Stereo channel separation: >70dB

Special Features

• Additional RCA Chinch input with the designation LOAD to be able to adjust the input impedance to the preamplifier.

Bi-wiring speaker terminals with the possibility of 4mm banana plugs (not CE version).

• Electronic protection circuit for low speaker impedance less than 2Ohm and short circuit.
• Differential input stage with paired double JFETs 3SK389
• Autozero offset compensation by integrator circuitry
• Transistor manufacturer Sanken for driver and output stage transistors, the latter with ring emitter structure and paired Beta Ic/Ib
• Low inductance emitter resistors made by Noble
• Professional FR4 printed circuit board with fabric inlay

Remarks

• Improved version of the P100 stereo power amplifier with optimized layout and RF immunity.

• There are 2 variants of the P101 in protection class I
  • Beginning of the 90s with country of manufacture "Made in England" on the backside
  • Mid 90's without country of manufacture indication on the rear panel, where the following modifications were made.
    • Modified inner chassis with mechanically optimised transformer mountings
    • Toroidal transformer with double output windings connected in parallel. --> less mechanical transformer hum
    • Reduced base current (bias current) of the output stage transistors approx. 65mA/140mV (old 95mA/210mV) --> less heating up
    • pre-driver stage with modified temperature compensation
    • modified RC element for compensation of the oscillation tendency
  • The P101 Made in England can be converted to the new version by component modifications.

Later also available as CE version with protection class II insulation, i.e. without 3rd earth connection in the IEC connector.

Pictures