First Lm3886

[Ted205]

as has been said the PSU filter will only reduce RF entering and leaving the power supply from the mains. These are not necessary. The real benefit however is the convenient package, i.e double pole switch fuse

[AndrewT]

Originally posted by Ted205
the PSU filter will only reduce RF entering and leaving the power supply from the mains. These are not necessary.

where does this conclusion come from?

[infinia]

Hi
You ask here at DIY and don't take the time to listen and then youve ordered something based on a digikey guys advice and now youve come back here to solve your problem. Hmm... perhaps you should contact the guy at digikey again.

[PJPro]

Originally posted by infinia
Hi
You ask here at DIY and don't take the time to listen and then youve ordered something based on a digikey guys advice and now youve come back here to solve your problem. Hmm... perhaps you should contact the guy at digikey again.

That's a bit unfair.

I asked for advice. Your advice came too late. Nonetheless, I followed the advice about the single pole fuse. I told the guy at Mouser (not Digikey) exactly what I wanted. He indicated the drawer I needed to buy to meet the advice received on this forum. He recommened the wrong one.

I haven't come back for you to solve the problem. I know what the solution is in this instance.......get the right drawer. I am just reporting back on progress.

[PJPro]

The part number of the one I want is 4301.1413. This comes with a shorting bar on the neutral. Unfortunately, there doesn't seem to be a UK distributor...or at least I can't find one one Google. Farnell, RS and the usual suspects make a special delivery charge i.e. it's not stocked in the UK.

So, it looks like I'm going to have to buy them from Mouser and, to avoid the £12 delivery charge, I'm gonna have to spend £50.

This is a major bummer.

[PJPro]

Rather than bleat, I've bitten the bullet and just bought them. To make the order up, I've bought three of the standard filter modules and 5 of the drawers.

I'll use two of the standard filter modules on the power amps and the third on the pre-amp (future project).

The cost of these modules is really ramping up......maybe I can sell the two medical filter modules on ebay to try and recoup some of the costs.

[pacificblue]

So the Mouser salesman did not recognize his fault?

http://www.schurter.de/wwwsc/con_wal.asp?language_id=10

[PJPro]

I didn't pursue the matter. Unfortunately, instant messenger doesn't provide the concrete evidence that an email does. Ultimately, I made the order. It's my mistake.

I just hope I've got it right this time....or I could end up being the latest UK distributor!

[Stuey]

PJ, assorted IEC sockets are sold by practically every supplier of electronics gear. Over here, even the crappiest store has a range of a few types.

Do you have any electronics suppliers locally - even basic ones? They're worth using for this sort of hardware, if not the more esoteric stuff.

Stuey

[Ted205]

Originally posted by AndrewT
where does this conclusion come from?

The filters are used to help meet EMI / RFI emissions standards. As already sugested by Juergen Knoop in an earlier post "rf will enter your amp at the other 'inputs' (audio in + speakerout) "

For diy you can I live without them.