Re: Replacing a choke coil



Well, the old one seems to be around 7.5mm internal and 12.5mm external diameter and roughly 5mm width, with an iron powder core. The one on aliexpress is a T50-52, so checking up on that standard it should be 7.7mm, 12.7mm and 4.8mm respectively, pretty much a good equivalent I would think.. I will just buy it and solder it on. What can go wrong I doubt I would damage a test CPU (and I do have more than enough 166MMXs to go around).. Fingers crossed, order placed, I will let you know in a month's time....

Re: Replacing a choke coil



Happy to oblige with pictures.....

Re: Replacing a choke coil

What are the chances of frying a cpu if I blindly replace with the choke from aliexpress I linked above? The relevant controller chip is on the CPU VRM after all.. But the part seems fairly identical, just 14 coils instead of 12 so likely 10-15% higher inductance?

Re: Replacing a choke coil



I looked at the inductor application and saw there was no definite value as well.. The tiroid is light blue on one side and on the interior suface, pale green on the other side and the exterior surface if that makes sense.



I guess *assuming* that I can source this I can reuse the wire to wrap 12 coils around it and it should work?

The closest affordable part I have found is this: [url]http://tr.aliexpress.com/item/TR10-8-3uH-3A-power-choke-power-inductor-magnet-part/32777238179.html[/url] but it has...

Re: Replacing a choke coil

It is a PCChşps/Elpina M534 VXPro+

Can you tell me the cap ratings of EC12 and EC17 as well if possible?

Re: Replacing a choke coil



The chip in question is a TL494CN; I believe this is the correct datasheet to check? [url]https://cdn.badcaps-static.com/pdfs/8d6394340b34e62d097d5888cd5e8891.pdf[/url]

I'm not exactly electronics literate so if you could point out where I should look, it would be extremely useful..Re: Replacing a choke coil<br /> <b...'m not exactly...

I acquired a Socket 7 motherboard not long ago.. Aside from a few missing capacitors, it also has a broken coil choke. It seems to me a ferrite bead of 12mm external 8mm diameter with a 12 loop copper coil around it..

I don't know how to determine (or guesstimate) the rating of this part, where to source it, and whether there are any suitable modern replacement component types for it as this type of component seems to be rather rare in supply and totally not used on newer parts (so something else must be used in its place?)

Can someone advise me on what to replace...

Re: New Members - please post your introductions here

Hello. I'm a collector of retro PC and Amiga parts and lately summoned the courage to do repair and recap work on my parts myself, I registered to post questions on problems I stumble across.