"Bi–Kits" Module Circuit Diagrams? - UK Vintage Radio Repair and Restoration Discussion Forum

Chris55000 · 28th May 2022, 8:40 pm

Did Bi–Pre–Pak ever produce circuit diagrams/service information for their range of Preamplifier/Amplifier/Power Supply Modules?

I bought a sheaf of the original printed "Bi–Kits" leaflets from another Member about a month ago, none of which had any circuit or component info on them, and more recently, two AL250 and two SPM120/65 modules, both in original boxes with the connection sketch on the back of the boxes but nothing packed in with them except a slip of paper in one box "For Service Return to "Bi–Pre–Pak Ltd. Ware, Herts. with a £1 postal–order to cover admin, post & packing".

Was that the only support obtainable from them?

Incidentally, both my SPM120/65 modules had the number removed from their TO–3 pass transistors – I presume it was a '3055H most likely!

Chris Williams

28th May 2022, 8:40 pm	#1
Chris55000 Nonode Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 2,874	"Bi–Kits" Module Circuit Diagrams? Did Bi–Pre–Pak ever produce circuit diagrams/service information for their range of Preamplifier/Amplifier/Power Supply Modules? I bought a sheaf of the original printed "Bi–Kits" leaflets from another Member about a month ago, none of which had any circuit or component info on them, and more recently, two AL250 and two SPM120/65 modules, both in original boxes with the connection sketch on the back of the boxes but nothing packed in with them except a slip of paper in one box "For Service Return to "Bi–Pre–Pak Ltd. Ware, Herts. with a £1 postal–order to cover admin, post & packing". Was that the only support obtainable from them? Incidentally, both my SPM120/65 modules had the number removed from their TO–3 pass transistors – I presume it was a '3055H most likely! Chris Williams __________________ It's an enigma, that's what it is! This thing's not fixed because it doesn't want to be fixed!