Audio Database

The

Audio of Oregon BT-2
178,000 yen(around the 1978 time)

Description
 
The preamplifier by whole page pure class A and the operation circuit which Barry Thornton who is also a designer of Quintessence PRE-1 designed for audio of Oregon.

It is constituted by three integral modules.

The signal output ON/OFF switch is carried.

A power switch is not carried but turning on electricity is always recommended.
Moreover, since the best operating state is reached, the warm up of about 12 hours is required.


Rating of a mode
Form Preamplifier
Input impedance Phono: 47kohm
Tuner, Aux, Tape:25kohm
Output load impedance Pre out: 500ohms
Tape out: 10kohm
mono out: 10kohm
Maximum except take-off 6V (10kohm load)
3V (500-ohm load)
THD 0.01% or less (by 4V output and 10kohm load)
Cross modulation distortion 0.01% or less (by 4V output and 10kohm load)
Signal to noise ratio (IHF-A) 80dB or more (as opposed to a 10mV input)
Phone maximum permissible input 150mV(1kHz)
Filter Subsonic Filter
Power source AC117V, 50Hz/60Hz
Dimensions Width 483x height 89x depth of 190mm
Weight 4.5kg