18-08-2020, 03:38 PM
They are really the same and the same as my tests.
The weasel aspects are Typical and Max.
Also I don't know what forward current the automagical Chinese tester was using. It's interesting that my 1N60P Vf is closer to the datasheet for the plain 1N60 and that my Green band 1N60 has the 1N60P Vf. And the Capacitances my of 1N60 and 1N60P are also reversed. Both the DEC and Weitron datasheets are similar.
For a crystal radio you want to assume a 4K (2 x 2K earphones) with an RF decoupling cap or 10k (a 10K resistor across a ceramic or crystal earpiece) with the ceramic earpiece as the 3nF to 10nF cap. A peak detector will give sharper tuning as it loads less, needs an extra diode and capacitance. Minimum signal is a little less, but it's twice as loud. Thus the forward current is tiny. I'd want to measure a number of diodes and I'd bet the aerial and earth and Q of tuning coil has more effect. Litz wire on a glass spice jar.
The weasel aspects are Typical and Max.
Also I don't know what forward current the automagical Chinese tester was using. It's interesting that my 1N60P Vf is closer to the datasheet for the plain 1N60 and that my Green band 1N60 has the 1N60P Vf. And the Capacitances my of 1N60 and 1N60P are also reversed. Both the DEC and Weitron datasheets are similar.
For a crystal radio you want to assume a 4K (2 x 2K earphones) with an RF decoupling cap or 10k (a 10K resistor across a ceramic or crystal earpiece) with the ceramic earpiece as the 3nF to 10nF cap. A peak detector will give sharper tuning as it loads less, needs an extra diode and capacitance. Minimum signal is a little less, but it's twice as loud. Thus the forward current is tiny. I'd want to measure a number of diodes and I'd bet the aerial and earth and Q of tuning coil has more effect. Litz wire on a glass spice jar.
