Tube Power Amplifier with EL34 - 35W |
|
| **Click on the Image for its larger version
����� ��� �������� ��������
������� ��������� ������ 35 W, �� ��� �L34 ��
������������� Push-Pull, ��� ��� Siemens & Halske, �� ����
��������� 24/3/1953 ��� ������ SV410/1. � ���������
��������� ��� �� 1954 ��� �� 1989, ����� ��� �����
����� �����������, �� ���� ��� ����������� 15 ����
��� �����. ��� ���������� ���������� ������ ����
��� ��� ������������� �������, ����������� ���
��������, ���������� ������� ������. ���
���������� ������ ����� �� ��� ������������� ���
����������� �������� ��� ������, �� �������. ��
���� �������� ��� �� �������, ��� �����
���������� ��� ��������� ���, �� ����� �
��������������� ������, (������ ��� ���� ���
�������� ����������), ���� ��� � ������� ���
������� ��� �� ��������. ������ ��
�������������� �� ��� �������� ��������������
������ ��������� ��� �L34. ���� ��������� ���
���������� (������ ��� ��� �� ����������
���������), ������ �������� ��� ������� ����
������ ������, �������� ��������������.
It's a classic designing of final amplifier 35
W, with two EL34 in push-pull, from the Siemens and Halske, with year of designing
24/3/1953 and code SV410/1. The amplifier it worked from 1954 until 1989, whenever it came
also out except operation, with mean of operation 15 hours per day. It did not present
particular damage beyond the replacement of tubes, resistances and capacitors, result of
natural deterioration. A essential change became with the replacement of restoring
provision from tube, with diodes. The alone problem that will exist, for those who they
try his manufacture, will be the transformer of expense, (it is in effect for all the tube
manufactures), one and code that exists it will help. It can be replaced with a classic
transformer of expense suitable for EL34. In his manufacture it needs (it is in effect for
all the corresponding circuits), enough experience and attention in high voltage, danger
of ELECTRIC SHOCK.
|
| R1=470K 0,5W |
R13-21=820K 0.5W |
C8-9=0.1uF 630V |
| R2-5= 2K2 0.5W |
R14-22=5K6 0.5W |
C10-14=0.47uF 630V |
| R3=150K 0.5W |
R15-20= 680K 0.5W |
C11-13=25uF 40V |
| R4= 220K 0.5W |
R16-19=100K 0.5W |
V1=E80CC
|
| R6-10= 56K 0.5W |
R17-18=3K3 1W |
V2=E80CC |
| R7=3.9K 0.5W |
R24=470R 2W |
V3-4=EL34 |
| R8= 220R 0.5W |
TR1-2=470R 1W
Variable (adj. 270�) |
Rectifier tube= Z2C |
| R9= 1M 0.5W |
C1-3-6-7=0.1uf 630V |
T1=Audio
Transformer for 2x EL34 Push Pull |
| R11= 39K 1W |
C2=220pF 600v |
| R12-23= 180K 0.5W |
C4-5=16uF 550V |
|
|
Sam
Electronic Circuits 8/01 |
|
|