JMPGuitars
Well-known member
- Joined
- Apr 30, 2018
- Messages
- 152
I finally have my M49C back to try and fix the output. It's still not loud enough, even with preamps cranked really high.
I want to test my AMI T49 in circuit. I don't know know what the transformer resistance values should be in circuit. Currently I'm getting 15.7Ω between A and B, and 703.5Ω between C and D.
These are my voltages when last tested a while ago:
Mic Connected, 5840W heater set to 6.3:
B+:
O 123
C 120
8 119
Polarization (Pin 6 on mic PCB):
O 0
C 58
8 119
Cathode:
O 1.6
C 1.93
8 1.93
Anode:
O 52.4
C 34.7
8 33
Thanks,
Josh
I want to test my AMI T49 in circuit. I don't know know what the transformer resistance values should be in circuit. Currently I'm getting 15.7Ω between A and B, and 703.5Ω between C and D.
These are my voltages when last tested a while ago:
Mic Connected, 5840W heater set to 6.3:
B+:
O 123
C 120
8 119
Polarization (Pin 6 on mic PCB):
O 0
C 58
8 119
Cathode:
O 1.6
C 1.93
8 1.93
Anode:
O 52.4
C 34.7
8 33
Thanks,
Josh