[sdiy] Help with Jupiter 8 clone

[John Speth]

For reference, the JP8 schematic is here: 
http://www.synthfool.com/docs/Roland/Roland_Jupiter8/roland_jp8_service_manual.pdf

The Hi Fi Special diodes are probably what Roland and others might have 
called them in the 80s. From the schematic, the only function I can 
think that they could possibly perform is over-voltage shunting. Metal 
Oxide Varistors (MOVs) perform that same function in modern circuits. I 
think those diodes are the 80s version of MOVs. A modern day PS might 
serve you better than trying to clone an ancient design.

JJS

On 8/1/2022 10:57 AM, Luís Marka via Synth-diy wrote:
> Hi guys,
>
> I am giving a serious thought about building a Jupiter 8 clone, and 
> started to take a deeper look at the schematics (actually I already 
> ordered some of the parts, so it looks like I will get it done 
> eventually). In the PSU there are three GP-30G diodes tied at the -15, 
> +15 and +5V outputs, listed as "Hi-Fi Special" both in the schematics 
> and in the parts list. I never heard anything about a "hi-fi special" 
> diode, any idea what that means??
>
> Cheers!
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at synth-diy.org
> http://synth-diy.org/mailman/listinfo/synth-diy
> Selling or trading? Use marketplace at synth-diy.org