Hello, Greetings from Spain.
I write because I have been trying for a long time to figure out what the problem is with a DLa2a compressor that I have set up following the [silent: orts] D-LA2A-rev02 scheme.
When I raise the gain potentiometer to more than 70% in VU mode the meter jumps and reaches the end. All the valves and the TB4 are connected without an input signal. This happens to me equally in both channels. :-\
If the meter does not pass from this point everything else works correctly, it compresses correctly and amplifies the signal.
I have done many searches and for now I do not find the problem, I have already changed the potentiometer by one of 25k, change channel valves, voltages ...
Components and voltages:
Transformer Input: WSM600 / 15K
Output transformer: WSM 15K / 600
Diode output: 351v
Output R34: 98v and 125v
Output R29: 273v and 277v
V1 (12AX7)
Pin 3: 1v
Pin 6: 121v
Pin 8: 1.16v
Pin 9: 3.3 (alternating current)
V2 (12BH7)
Pin 1: 104v
Pin 3: 3v
Pin 6: 235v
Pin 8: 109v
V3 (12AX7)
Pin 1: 86v
Pin 3: 0.8v
Pin 6: 86v
Pin 8: 0.8v
V4 (6AQ5A)
Pin 2: 4v
Pin 5: 119v
Pin 6: 82v
I do not know what to try anymore, I do not have many components to go testing. Has anyone had something like this? Do you know why it happens?
THANKS!
I write because I have been trying for a long time to figure out what the problem is with a DLa2a compressor that I have set up following the [silent: orts] D-LA2A-rev02 scheme.
When I raise the gain potentiometer to more than 70% in VU mode the meter jumps and reaches the end. All the valves and the TB4 are connected without an input signal. This happens to me equally in both channels. :-\
If the meter does not pass from this point everything else works correctly, it compresses correctly and amplifies the signal.
I have done many searches and for now I do not find the problem, I have already changed the potentiometer by one of 25k, change channel valves, voltages ...
Components and voltages:
Transformer Input: WSM600 / 15K
Output transformer: WSM 15K / 600
Diode output: 351v
Output R34: 98v and 125v
Output R29: 273v and 277v
V1 (12AX7)
Pin 3: 1v
Pin 6: 121v
Pin 8: 1.16v
Pin 9: 3.3 (alternating current)
V2 (12BH7)
Pin 1: 104v
Pin 3: 3v
Pin 6: 235v
Pin 8: 109v
V3 (12AX7)
Pin 1: 86v
Pin 3: 0.8v
Pin 6: 86v
Pin 8: 0.8v
V4 (6AQ5A)
Pin 2: 4v
Pin 5: 119v
Pin 6: 82v
I do not know what to try anymore, I do not have many components to go testing. Has anyone had something like this? Do you know why it happens?
THANKS!