http://farm6.static.flickr.com/5230/...e5b621d5_b.jpg
This is John's NAD 3130, now checked and adjusted (was in spec anyway). Just brought it a little closer to ideal settings of bias and centre voltage. Electronics re-housed in a better 3130 case and front panel that I had.
Feeding the pre out of the NAD into the Radford seems to work really well.