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

SiriusHardware · 10th Jun 2018, 9:56 am

If you need to resolve the question of compatibility of your 74LS157s you can always send them to me and I can tell you if they work in an original MK14.

The original parts are National Semiconductor branded parts, as that was who supplied the kits of parts to Science Of Cambridge. Anyone attempting an MK14 new-build should probably therefore aim to find the NS branded type if possible.

Gertk64, who posted in this thread a while back, said he had had to replace his original choice of 74LS157 parts with 74LS257s, so that might be another option if you have problems sourcing parts which work.

10th Jun 2018, 9:56 am	#64
SiriusHardware Dekatron Join Date: Aug 2011 Location: Newcastle, Tyne and Wear, UK. Posts: 11,556	Re: MK14 schematic revisions If you need to resolve the question of compatibility of your 74LS157s you can always send them to me and I can tell you if they work in an original MK14. The original parts are National Semiconductor branded parts, as that was who supplied the kits of parts to Science Of Cambridge. Anyone attempting an MK14 new-build should probably therefore aim to find the NS branded type if possible. Gertk64, who posted in this thread a while back, said he had had to replace his original choice of 74LS157 parts with 74LS257s, so that might be another option if you have problems sourcing parts which work.