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

TonyDuell · 13th Jan 2019, 4:12 pm

I bought said kit today (the branch of 'The Works' in the 'Glades' shopping centre, Bromley if it matters). I've not attempted to build it yet but I did check the diode. My multimeter gives a forward voltage drop of 0.7V for it, so I am pretty sure it's silicon. So it wasn't a one-off mistake in the 'ionburn's kit.

What's the betting that the ST4148 is a 1N4148?

A schottky diode might work in place of a germanium one, but I doubt you'd get a strong enough signal to use the normal silicon diode.

13th Jan 2019, 4:12 pm	#8
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,215	Re: "The Works" Crystal Radio I bought said kit today (the branch of 'The Works' in the 'Glades' shopping centre, Bromley if it matters). I've not attempted to build it yet but I did check the diode. My multimeter gives a forward voltage drop of 0.7V for it, so I am pretty sure it's silicon. So it wasn't a one-off mistake in the 'ionburn's kit. What's the betting that the ST4148 is a 1N4148? A schottky diode might work in place of a germanium one, but I doubt you'd get a strong enough signal to use the normal silicon diode.