UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Brenell STB-1 Restoration & Help Needed

Ted Kendall · 23rd Apr 2017, 2:08 pm

JRF Magnetics have the remaining Nortronics stock.

In my view, making your own heads is a mug's game - the principles are simple enough, but the devil is in decades of detail. Apart from anything else, they were generally made in two halves for ease of winding the coils and then assembled. The alignment of the halves and the production of a stable gap of the right dimensions between them is non-trivial. Repair is generally stymied by the fact that most of them are potted...

Half track stereo heads are scarcer because the format wasn't as popular as quarter track, tape economy being uppermost in the minds of most buyers at the time. The unloved Chilton machnes used Bogens, as did Truvox. Woelke (Miniflux) are worth seeking out - they aren't known to suffer the o/c problem.

23rd Apr 2017, 2:08 pm	#15
Ted Kendall Dekatron Join Date: Jul 2008 Location: Kington, Herefordshire, UK. Posts: 3,675	Re: Brenell STB-1 Restoration & Help Needed JRF Magnetics have the remaining Nortronics stock. In my view, making your own heads is a mug's game - the principles are simple enough, but the devil is in decades of detail. Apart from anything else, they were generally made in two halves for ease of winding the coils and then assembled. The alignment of the halves and the production of a stable gap of the right dimensions between them is non-trivial. Repair is generally stymied by the fact that most of them are potted... Half track stereo heads are scarcer because the format wasn't as popular as quarter track, tape economy being uppermost in the minds of most buyers at the time. The unloved Chilton machnes used Bogens, as did Truvox. Woelke (Miniflux) are worth seeking out - they aren't known to suffer the o/c problem.