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BEHRINGER T-1 Tube Condenser Mic
+11,6V
Simple view (two PCBs combined)
Besides -20db switch there is also Low Cut switch located on external power supply unit.
B+
+192V
R3 82k LED1 (valve socket backlight) 5 C3* 6
R11 3,3k C5 22uF 16V GND
+9,8V
R6 5,1k C4
+171,5V
1uF 350V 7 1 6 R1 1k GND
+7V
D C3 Black Electret Capsule d=9,7mm (no internal FET) 3 R4* 120k R5* 30k C2* 22uF 25V C1 10uF 16V White 470p R5 510M R10 5,1k Q1 G S
FET/ N
2 330n
+19,3V
V1 12AX7
J202
+2,8V
C2 1n R8 10k R9 2k R7 470k 3 2
+1,8V
4
3 4 9 5 8
R2 220R
R4 100k
"BILLION" Transformer
J60-39553-02364
1
C4*
R1* 3,3k SW1 R2* 56k C1* 2,2uF 50V 1
+63,9V
8 1uF 350V
T1 7-pin CONNECTOR (to external power supply unit)
+2,3V
+192V
C5*
-20dB pad
+11,6V
R6* 33k 7 2
+11,6V
GND SIG + SIG -
6 5 4 7 3 2 1
R3* 16,8k
220p
J2
GND
CHASSIS GND
primary Rdc=2,2k
secondary Rdc=59 Ohm
12AX7 J202 top view
G7
6 4
(ECC83) Fc A'
9 1 2 3
pins 1-8 of header J1
(not shown on this schematic)
K 8 D S G
G' K'
ATTENTION!
There are duplicated component annotations on two PCBs of the microphone.
A
F
5
Drawn by Paul Stone @ 2017
This schematic is NOT original Behringer source.
F