Bush TR130 Servicing Instructions

BUSH

General Description:

operated portable receivers, each using seven transistors and one crystal
diode, and covering the Long and Medium wavebands.
range provides electrical bandspread of the high frequency end of the
Medium waveband.
only in presentation.

Wavebands:

band: 187-S70 m. (160S to S2S kc/s.).
1430 kc/s.).
Battery: One 9-volt Ever Ready type PP9 or Drydex type DT9.
battery consumption is IS mA. quiescent and 2S mA. at average listening
level.

Transistors (Mullard Type):

(AFII7) I.F. amplifier.
amplifier. VTS
Push-pull output.
Crystal Diode: CDl (OA90) Detector.
Earpiece Socket: A socket is provided at the side of the receiver into
which may be plugged an earpiece of 20-1000-ohms impedance.
tively, this socket may be used with an external loudspeaker of Is-ohms
impedance.
Tape Recording: No special provision has been made, but the earpiece
socket provides a low-impedance output source to which a tape recorder may
be conducted.
about I S ohms.
muted when using this method of recording.
CAPACITOR
DRIVE DRUM
RADIO SERVICING
Models TR130 and TR130D are battery­
Both models
L.W. band:
VT3 (AFII7) I.F. amplifier.
(OC81D) Driver
The connecting lead should be terminated with a resistor of
It should be noted that the internal loudspeaker will be
Models TR 130 and TRI30D
are electrically
1070-1900 m. (280 to IS8 kc/s.).
B.S. band:
VTl (AFII7) Mixer/oscillator.
stage. VT6
F42
DRIVE CORn
106
An additional
identical, differing
187-210 m. (160S to
VT 4 (OC71) Audio
(OC81), VT7
Alterna­
M.W.
The
VT2
(OC81)