wilcofan
Active member
Hey all,
I need your help. As you may have seen on a thread here or Gearslutz, I'm trying to sort out my own stereo switch for a pair of 525's. They are consecutive serials from 1998.
There is a PDF floating around which points to pin 7 and 8 being part of a switch, but a call to API tech points to the fact this is for pre-1980 525's. Mine, being from 1998, fall under the lot that need pin 6 strapped with a 120 ohm resistor. The proof for pin 6 is actually on the API site, which I'd missed early in my searches. There is a diagram there of the pin assignment with a stereo link slotted in pin 6.
So, you may ask, why am I still stumped? Well, first I am confused by the action I'm seeing with pin 6 strapped. The meters will not track together. Another API 525 user (with a proper 500H rack promising stereo linking built-in) concurs that the meters don't track together in stereo.
That's the first part of my discussion. Why don't they track together and how can it be considered stereo linked if they don't? (other than the obvious that there are two channels!)
Second, looking at the PCB for the 525 I am not sure there is any connection to pin 6 at all! I am nobody to confirm this but looking at it, it really looks like it's an empty pin.
The silkscreening on the pins suggests it's empty too, but API tech says that's because it was common for the modules to use generic cards. Makes sense. But can someone look at these photos and please tell me where there is a connection on pin 6?
(6 from the right on this photo above)
(it's 6 from the left on this photo above)
(pin layout as API promises for current reissues)
Thanks,
Bobby
I need your help. As you may have seen on a thread here or Gearslutz, I'm trying to sort out my own stereo switch for a pair of 525's. They are consecutive serials from 1998.
There is a PDF floating around which points to pin 7 and 8 being part of a switch, but a call to API tech points to the fact this is for pre-1980 525's. Mine, being from 1998, fall under the lot that need pin 6 strapped with a 120 ohm resistor. The proof for pin 6 is actually on the API site, which I'd missed early in my searches. There is a diagram there of the pin assignment with a stereo link slotted in pin 6.
So, you may ask, why am I still stumped? Well, first I am confused by the action I'm seeing with pin 6 strapped. The meters will not track together. Another API 525 user (with a proper 500H rack promising stereo linking built-in) concurs that the meters don't track together in stereo.
That's the first part of my discussion. Why don't they track together and how can it be considered stereo linked if they don't? (other than the obvious that there are two channels!)
Second, looking at the PCB for the 525 I am not sure there is any connection to pin 6 at all! I am nobody to confirm this but looking at it, it really looks like it's an empty pin.
The silkscreening on the pins suggests it's empty too, but API tech says that's because it was common for the modules to use generic cards. Makes sense. But can someone look at these photos and please tell me where there is a connection on pin 6?
(6 from the right on this photo above)
(it's 6 from the left on this photo above)
(pin layout as API promises for current reissues)
Thanks,
Bobby