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https://diyparadise.com/w/wp-content/uploads/2008/06/waily5687top.jpg828778Update: Simple 5687-based preamp Since the day I put up the Simple 5687 preamp on my website, I have been overwhelmed by the response! So many have approached me and so many have initiated their rites to tube DIY! Some of their baptism of fire was easy, while some had a bit more trouble, but overall, no one has yet written to me claiming they don’t like the preamp. This is great! Well, if you have built your 5687 preamp, write to me and I’ll put your work here. Waily, Ang Mo Kio, Singapore