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TonyDuell · 25th Nov 2017, 7:38 pm

Yet another bit of tweaking. For cosmetic reasons I replaced the machine screws that fix the deck chassis to my new mouting blocks with slot head types (as all other screws in the machine have that sort of head). And I've put BC640 transistors in the flip-flops (in place of the original AC128s).

Still works fine, I think the BC640s are better here than 2N3906s as they have to handle the pinch roller solenoid current.

25th Nov 2017, 7:38 pm	#67
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,213	Re: Philips N4450 Yet another bit of tweaking. For cosmetic reasons I replaced the machine screws that fix the deck chassis to my new mouting blocks with slot head types (as all other screws in the machine have that sort of head). And I've put BC640 transistors in the flip-flops (in place of the original AC128s). Still works fine, I think the BC640s are better here than 2N3906s as they have to handle the pinch roller solenoid current.