11/45 RL02 faults when RX02 is on

Tony Duell ard at p850ug1.demon.co.uk
Wed Apr 4 16:33:16 CDT 2007


> Forgive the delay in writing about this.  I had the EXACT same problem
> with RXO2 mounted on top of an RL02 drive on y PDP 11/34A. At the time,
> my suspicion was that the gigantic transformer in the power supply of

That's a ferroresonat transformer IIRC (why, I have no idea, there are 
conventioal electronic regulator circuits in the PSU too). There could be 
considerable stray field from that.

I still suspect the spindle motors of the RC02 first, but I've got no 
real evidence for that.

Jay, can you rearrange the items in your rack to move the RX02 and RL02 
apart?

-tony


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