A tip for anyone building a tube amp with octal tubes in it: do not import ceramic sockets. They are expensive, the quality usually is poor and you wind up having contact issues. Buy:
http://za.rs-online.com/web/search/searchBrowseAction.html?method=searchProducts&searchTerm=4247477&x=0&y=0
Just look at the price: less in Rands than the ceramics in $.... Fits perfectly. Tried and tested. 8)
Now when are they going to invent noval relays ?
