Gents, my 'inch' was a lie. Must use calipers. The existing OC81's are 15mm in length x 6mm dia. The new ones are 10mm x 6.5mm dia.
These new ones were listed in Cricklewoods transistor section under base numbers Nxxx - Sxxx ; P3:
http://www.cricklewoodelectronics.co...cat=191&page=3
The first pic. is the new 'uns, the second shows both transformers with some 'melt' on top of the left hand one (T2 on the sheet), and the third shows the two existing OC81's side by side between the T2 and the C32 capacitor.
Wrong ones?
PS I suspect base is the middle wire of the three, and perhaps(?) collector aligning with the grey line on the new ones. but I'm not doing anything until further guidance or confirmation.
Derek