SWR Workingmn's 15 bias adjustment

[Enzo]

It probably doesn;t need to be adjusted. You didn;t twiddle it, did you?


The factory setup sheet simply asks us to verify the green and red LEDs come one appropriately.

[mokomon]

This amp had been messed with before I got it in for repair , so who knows what was done . The limiter light was coming on quite often even at low volume settings after I got the amp up and working. I guessed at how to set the limiter circuit , but I doubt that I did it correctly. It would be really nice to know how to set it correctly as per the factory settings. So if someone out there knows the factory way to set this up properly , I would be much appreciated to know how it is done . Thanks to everyone who has responded to my original post on this amp.

[mokomon]

Also I adjusted the bias for this amp by using a 2 ohm load , 1khz signal , 2 v at speaker out, and adjusted bias pot until "notch" in waveform just disappeared. Is this correct ?

[Jazz P Bass]

WM 15 bias & test procedure

That procedure is what I have read.
If the Xover notch is just gone, you are good.

The limiter Green LED is set to be on , with the same test settings as above, when the amp is adjusted to output 100 watts (28V RMS into 2 ohms).

[mokomon]

Thanks to all , the amp is working excellent