Wanted INDUCTOR 4.7 UH 3A (5551-09822-00)

[biglouieuk]

I'd love to find a new one of these in the UK, so I can keep shipping costs down.

 

[stumblor]

If you find any, get a couple of extra please? I was looking for them a while back too.

 

[biglouieuk]

If you find any, get a couple of extra please? I was looking for them a while back too.

Will do so sir!

 

[Pick Holder]

They are easy to make, a bit of ferite and a few wraps of 2.5mm mains cable stripped away wrapped around it. I have never known one of these to fail. It is just a coil.

 

[biglouieuk]

All the parts are off, and it's had a light wet and dry and a scrub with anti corrosion acid

2 traces lifted. But can jumper them.

But I think the bigger issue is the through-holes. The corrosion has really eaten into those and even though the solder sucker pulled all the solder, each was like a little volcano on the parts side.

I sniped each leg and then went in on top with desoldering gear....

I dunno how to fix those holes. If there is no metal there then there is no connection to the traces....

Those holes, not great.

Scrap!

 

[stumblor]

You can sometimes use pcb rivets to create a new connection, I've found that 0.9mm is the right size for this type of through hole.

https://www.ebay.co.uk/itm/PCB-Rive...-/293273630558?_trksid=p2349624.m46890.l49292

But they are fiddly to work with, hard to press, and if you don't press them straight the hole won't be big enough to take the new leg. For the number of holes you have to repair, it's going to be a big job.

These boards have such tiny traces they are a pain in the a5se to work on. Coupled with the fact that they are often acid damaged, more often than not the work isnt worth the effort.

I've managed to fix boards in a better state than this one, but if it were me, a board like this is for the bin. Unless you're doing it for fun.

 

[biglouieuk]

I think you're probably correct! I'm doing it for fun at the moment. But as they say, "When the fun stops. Stop!"

 

[stumblor]

Good practise in any case. Give the rivets a go.

 

[Pick Holder]

@stumblor - if you send me the old one, I will wind you a new one if you dont have the correct size cable.

 

[stumblor]

Thanks @Pick Holder appreciate that. The board I did recently it wasn't too bad so just reused it, but thought it would be good to have a couple in the parts box as backup.

What is their function by the way?

 

[Pick Holder]

Stores magnetic engergy Mr @stumblor

 

[stumblor]

Oooooohh

 

[biglouieuk]

I think they provide a smoothing effect against spikes of lecky?

 

[biglouieuk]

@stumblor - if you send me the old one, I will wind you a new one if you dont have the correct size cable.

Just unwind the old one and wind new copper cable of the same thickness round the core?