>From what I can see, just use 3A diodes all round - the 57-42 is a 1N5403 (300V PIV, 3A, DO201) and the 57-65 is an 1N4002 (100V PIV, 1A, DO204).
Use 4 x 1N5403. Nick On Thursday, 6 August 2020 15:00:15 UTC+1, orange_glow_fan wrote: > > > Working on this GC-1195.... > > > I need to replace the diodes in the power supply (along with the two > electrolytic caps. For some reason Heathkit used different diodes for > (D101,102) and (D103,104). > > D101,102 are three amp diodes while D103,104 are 1 amp diodes. It's my > intention to use three amp diodes (NTE-156) to replace all four diodes. > Then self doubt crept in and I am questioning my choice. > > Is there any reason you can think of that you can think of, other than > cost savings, that Heathkit engineers used diodes of differing current > ratings in this full wave bridge? Note that the emitter of Q1 goes off to > power the incandescent bulbs of the display segments. Q1 is sourced from > the center tap of the transformer. > > So, can I simply use 4 three amp diodes or am I missing something?? > > Thanks > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/c9f63646-0498-4881-8ca7-f5c9118338d8o%40googlegroups.com.
