See Electric Radio Magazine for Hal's Article:
1-Tube Back to the Future CW Transceiver, Issue 169, June 2003, page 8
and Update Issue 185, October 2004, page 25
But speaking of Hal, it interesting to view his inventory of "stuff". Having never been to his location, it's hard to get a total perspective of space, but he's got lots of "stuff".
See all the pictures at this URL:
http://www.landaircom.com/showroom.html