[retailer]

The core is a good size lump of iron with 38mm x 44mm central core x-section - primary turns total 3600 - the winding layout is not at all exotic see the pic - I had previously loaned him a pair of 2A3's and was invited to come and listen to the SE amp he had built using Hammond OT's, played through speakers of his own design - 2 way, JBL 15" with Celestion Horns. It was very impressive with bags of volume and was hard to believe it was only around 3 watts max.