Gemini PL-90 Power Conditioner help

[HTH]

I saw this on ebay for cheap and decided to take a punt.

Opening it up shows that it's no more than a string of IEC sockets with a single cap (possibly an MOV) across the mains supply.

There looks to have been additional caps between hot/ground and neg/ground, but these have been removed.

So... Its not really doing any 'power conditioning' :0(

I'd rather just try and build some mains filtering/suppression into it than return it to the seller.

From what I've looked at online, it seems that a couple of inductors in-line with either side of the supply plus some caps from hot/ground and neg/ground on either side of the inductors would help. Like this... Jon_Risch's Web Site

Anyone?

[HTH]

Bueller?

[R.G.]

There are purpose made power line filter modules that do this with guaranteed performance and much lower risk of making a mistake on a component rating or wiring. But that adds to cost.

Jon's site appears to offer some good advice on picking parts. Do NOT use underrated parts, especially on the "X" and/or "Y" caps you buy, and be very, very sure you get the fusing and wiring creepage/clearances big enough, as well as testing the ground bonding when you get done. Anything else is building in a shock and/or fire hazard.

[HTH]

Cheers RG, I appreciated the advice.

I've looked at purpose-made filters, but I thought it might be easier to do it myself.

From what you suggest, it might just be easier to use one of those distribution sockets with in-built filtering, like this...

Tacima CS929 6 Way Mains Conditioner RFI Filter Surge on eBay (end time 08-Jul-11 12:18:19 BST)