Note: Be aware of polarity of capacitor for you that are not very experienced. The shortest pin/leg is the minus and should be soldered at the point closest to the Vampire edge. I thing this is not indicated in the video.
I don't think it's important to use as much as 220uf, I used a couple of 100uf I had laying around instead. My card became 100% stable, also when using 12x core, that one wouldn't even boot before this mod. Please feel free to correct me if wrong.
Leigh Russ
Posts 151 05 Mar 2018 00:22
Or don't use electrolytic capacitors at all, and just replace the existing 0805 SMD ceramic capacitors with SMD 0805 22uf capacitors. Or even just add an additional 22uf SMD capacitor to the one that is already in place.
Gunnar von Boehn (Apollo Team Member) Posts 6214 05 Mar 2018 00:24
Leigh Russ wrote:
Or don't use electrolytic capacitors at all, and just replace the existing 0805 SMD ceramic capacitors with SMD 0805 22uf capacitors. Or even just add an additional 22uf SMD capacitor to the one that is already in place.
Please keep the one in place! Do not remove it. Just add an 22uf or 10uf on top
Leigh Russ
Posts 151 05 Mar 2018 10:48
After speaking with Majsta it appears that the early boards had a single 10uf capacitor, where it should have been 2x 22uf for the output of each regulator. It therefore makes more sense to replace the 10uf with 2x 22uf than it does to just add one to the existing. Unless there is any other reason to leave the 10uf in place?
I guess it also depends on the skills or capabilities of the person doing the work
Anssi Luukkonen
Posts 2 05 Mar 2018 20:00
What capasitors do I need to upgrade? What are their numbers on board?
Leigh Russ
Posts 151 05 Mar 2018 20:03
C3 and C6.. NOTE that it's only needed for the V600 V2.
Best way to test if the mod is needed is to flash the 2.7 core. If it doesn't boot then you need the mod. Alternatively measure the cap values and if it's less than 22uf then needs to be modded
Anssi Luukkonen
Posts 2 23 Mar 2018 08:43
My card works with 2.7 and 2.8, but only 10x it is stable. Would this soldering help to stabilitity with higher clocks?
Gunnar von Boehn (Apollo Team Member) Posts 6214 23 Mar 2018 08:57
Anssi Luukkonen wrote:
My card works with 2.7 and 2.8, but only 10x it is stable. Would this soldering help to stabilitity with higher clocks?
What model of card do you have? What Amiga model do you use it in? What other hardware do you have in the Amiga?
Chris Dennett
Posts 67 23 Mar 2018 12:35
Leigh Russ wrote:
C3 and C6.. NOTE that it's only needed for the V600 V2.
Best way to test if the mod is needed is to flash the 2.7 core. If it doesn't boot then you need the mod. Alternatively measure the cap values and if it's less than 22uf then needs to be modded
It's also needed for the V2 500 non-plus, if you have one. Instructions are the same. I had to do it to achieve stability.
Documentation about the Vampire hardware
