UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Focus Diode · 21st Sep 2018, 7:15 pm

The microswitch on the tuner is broken at the centre contact, thus needs to be replaced. I have a couple of spare tuners but don't know if they have micro switches on them. I'll have a look later.

Replacing the width control with a 2M2 component has revealed a new problem- lack of width. The boost voltage is under 600V on 405, (should be a maximum of 670V), with the control set at maximum.

There's some high value resistors in the vicinity which have probably changed value.

Brian

21st Sep 2018, 7:15 pm	#57
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Re: Stuck on a BRC 1400! The microswitch on the tuner is broken at the centre contact, thus needs to be replaced. I have a couple of spare tuners but don't know if they have micro switches on them. I'll have a look later. Replacing the width control with a 2M2 component has revealed a new problem- lack of width. The boost voltage is under 600V on 405, (should be a maximum of 670V), with the control set at maximum. There's some high value resistors in the vicinity which have probably changed value. Brian