09-11-2019, 08:00 AM
(08-11-2019, 05:40 PM)Mark Hennessy Wrote:(08-11-2019, 03:43 PM)ppppenguin Wrote: You will have to search hard to find new carbon composition resistors these days.
Not really - carbon-comp resistors are readily available. They are primarily used where surge currents are encountered - the obvious place being the 100 ohms or thereabouts that you find in capacitor dropper power supplies, and for inrush limiting in small switched-mode supplies. They look just like the old ones:
https://uk.rs-online.com/web/p/through-h...s/0386048/
https://uk.farnell.com/neohm-te-connecti...dp/1265066
The price is a bit of a shock. The RS parts are over 20p each. 0.25W 1% metal film parts are usually under 2p each. Presumably because the compo resistors are now made in realtively small quantities.
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
