Replacing The STV-3H and -4H Diodes

[ring]

The items I found described as "STV-3H" on an auction site are unlabeled except for a yellow dot

Measuring 1.460 on a Fluke, looks promising. Leads are ~3"

Will post when I can observe behaviour in circuit.

 

[JoseHH]

The ones I have look identical. The orange dot is the forward voltage rank (it is an STV-3H-O it should have Vf of 1.68-1.7V at 7mA) I use a small home made current source adjusted to 7mA to measure the ones I have and i got about 1.6V to 1.7V for the STV-3H and 2.1 to 2.2 V for the STV-4H.