Sister Ray
Member
- Joined
- Jul 10, 2008
- Messages
- 22
Lately, one of my AM-864/u units started to get a bit more noisy, so I took it out of the rack for a
re-capping job. A year ago, that worked a treat with my other unit.
Now, there are some minute differences in layout between the two units, and most of them I've been able to understand why that might be...
There's one change that I don't understand why it's been made though: A 10K carbon comp resistor has been strapped across the secondary of the input transformer (terminals 4 & 6). From looking at the solder-joint, that was done either one the original unit, or maybe put in a long time ago, it's certainly nothing recent...
Does anyone know why this might have been done, and/or what the effect is on the function of the compressor? (The impedance of the secondary of the input xformer is already rated at 10K, so I assume the extra resistor will drop the impedance of the secondary to 5.1K, but I don't really get why one would do this).
Regards,
Sister Ray
re-capping job. A year ago, that worked a treat with my other unit.
Now, there are some minute differences in layout between the two units, and most of them I've been able to understand why that might be...
There's one change that I don't understand why it's been made though: A 10K carbon comp resistor has been strapped across the secondary of the input transformer (terminals 4 & 6). From looking at the solder-joint, that was done either one the original unit, or maybe put in a long time ago, it's certainly nothing recent...
Does anyone know why this might have been done, and/or what the effect is on the function of the compressor? (The impedance of the secondary of the input xformer is already rated at 10K, so I assume the extra resistor will drop the impedance of the secondary to 5.1K, but I don't really get why one would do this).
Regards,
Sister Ray