Hi ex 2 Base. Interesting info, what do you mean by the original listening site? The man I spoke to was at the Bury Radio Rally, prob 1984 [as per the linked in thread from 2012 by Chris Parry p7*]. The elderly chap in that Nursing Home had been interviewed by Chris p8*. I only wish I'd done the same with the man at the Rally
When I just click on Pete's link Mike [I don't use Adobe] it comes up right away but I am computer numb so I can't help you with that problem. Somebody will I'm sure.
I note that Chris's excellent [and free] "THE RESTORATION OF VALVED HIGH FREQUENCY COMMUNICATIONS RECEIVERS", posted on line, is now in it's third [2014] edition and still available. 120 pages but well worth the ink and paper. Recommended!
Dave W