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

mhennessy · 31st Dec 2017, 1:41 pm

Did you remember a series diode? The original cells were rechargeable, so are trickle-charged when the machine is on.

Most sources recommend including a series resistor as well (I use 150 ohms), but I'm not sure how necessary that really is. I usually fit both of these in the unused space of a 4AA battery holder.

31st Dec 2017, 1:41 pm	#24
mhennessy Dekatron Join Date: Jul 2007 Location: Evesham, Worcestershire, UK. Posts: 4,244	Re: BBC Master boot Did you remember a series diode? The original cells were rechargeable, so are trickle-charged when the machine is on. Most sources recommend including a series resistor as well (I use 150 ohms), but I'm not sure how necessary that really is. I usually fit both of these in the unused space of a 4AA battery holder.