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

Jon_G4MDC · 10th Nov 2019, 10:23 am

I have done a lot of these. You can cut down the weld between the black lid with 3 contacts and main case (yellow for a 9V RX one). The lid will pop up on the spot welded strips that connect the cells.

Gentle working of the assembly will get the cells out of the case. You might want to wash it down first to remove any crystals/electrolyte before going too far in this direction.

Usually the cells are goners. Best to find new ones from another source. I would avoid the new PP3 types with NiMh cells - they self discharge too much for my liking and I don't think they are much good at heavy loads such as the BE439 on TX.

I'm not sure if cells that size are still available in NiCd so good luck.

10th Nov 2019, 10:23 am	#2
Jon_G4MDC Nonode Join Date: Nov 2015 Location: Welwyn Garden City, Hertfordshire, UK. Posts: 2,015	Re: PYE PF1 Refurbishment? I have done a lot of these. You can cut down the weld between the black lid with 3 contacts and main case (yellow for a 9V RX one). The lid will pop up on the spot welded strips that connect the cells. Gentle working of the assembly will get the cells out of the case. You might want to wash it down first to remove any crystals/electrolyte before going too far in this direction. Usually the cells are goners. Best to find new ones from another source. I would avoid the new PP3 types with NiMh cells - they self discharge too much for my liking and I don't think they are much good at heavy loads such as the BE439 on TX. I'm not sure if cells that size are still available in NiCd so good luck.