When replacing diodes...

[leydenjar]

I need to replace a two different types of zeners in an efffect pedal.

The diodes aren't made anymore so I need subs.

What are the important parameters to follow and how do I read these specifications?

I also have a standard switching type I need to replace. Are the guidelines the same?

I know it's an elementary questin but I almost never have to deal with diode replacement.

They are: RB11EB3, 1S2473, RD5.6EB3RD11EB3.pdf

[soundguruman]

The diodes are still made, just under a different number.
You want to know the voltage and current. Then replace it accordingly.

[doctor]

I need to replace a two different types of zeners in an efffect pedal.

The diodes aren't made anymore so I need subs.

What are the important parameters to follow and how do I read these specifications?

I also have a standard switching type I need to replace. Are the guidelines the same?

I know it's an elementary questin but I almost never have to deal with diode replacement.

They are: RB11EB3, 1S2473, RD5.6EB3[ATTACH=CONFIG]20270[/ATTACH][ATTACH]20271[/ATTACH]

If you need to replace the RD11EB3 and the RD5.6EB3, you can use any 0.5W zener diodes in corresponded package having nominal zener voltages 11V and 5.6V correspondently.

For 11V possible replacements are: 1N4698, HZC11C1, HZC11C2, MTZJ11B and ZPD11.
For 5.6V possible replacements are: 1N752A, 1N4690, HZ6B1, HZ6B2, HZ6B3, MTZJ5.6B and ZPD5.6.

The 1S2473 is ultra fast switching diode having 1.5nS recovery time, peak reverse voltage 40V and peak forward current 300mA.
I have not at the moment suitable recommendations, and you need to search for ultra fast switching diode with recovery time no more than 1.5nS, and peak reverse voltage and peak forward current no less than 40V and 300mA correspondently.

Good luck,

[Mark Hammer]

Keep in mind that many different component manufacturers will produce replacements, sometimes with the same part number, and sometimes with a different one. The pedal manufacturer will never provide a schematic with all possible suitable replacements. They will simply show you what THEY used, and leave the replacement decisions up to you. There may be times when it is appropriate to be fussy about the particular component, and other times when it isn't.

In this instance, the function of the zener is likely going to be pretty standard, and not really have any direct impact on the audio path. In which case, anything that can perform the same function is fine. If the only thing you can find is a higher wattage zener, no big deal. As long as it fits.