I have an original ST-35 with Gillespie's EFB mod which is a great piece of gear, but I was wondering about the rectifying diodes. They're the usual 1N4007 and I'm thinking about replacing these with the Cree SiC Schottky's. The 1N4007's are 1A 1000V rated as per the ST-35 manual, but the closest I can find from Parts Connexion are 5A 1200V. I guess the little extra power rating would be a good thing, except that some people claim that Schottky's don't like to be used in high voltage situations. Maybe theses people were talking about the older models.
Anyhow, would these be applied in the same manner: one leg of the Schottky to the PT secondary and the other end to the first stage of the can cap? There appears to be a mounting tab for these which I'm guessing you don't want touching anything metal. So I guess having them suspended in air would be appropriate. Do these get very hot and would the small chassis be enough room for ventilation?
Please advise. Thanks