Microfilters and Surge Protectors

[hoggyland]

My telephone line is at present channeled via my surge protector. Can anyone tell me where I should fit a micro-filter. For example, before the telephone line enters the Surge Protector or at the output stage before it goes on to enter the Router.

Many thanks

[4candles]

Assuming you want to protect the filter and the phone then fit at the output of the protector. Probably won't affect performance, if the lead isn't too long.

If it does affect performance, fit it direct at the phone socket, but be prepared to possibly sacrifice the filter and phone - they'll be cheaper to replace than the router and/or PC.

[rojash]

Where I live, lightning strikes on the phone lines are extremely common. So all our phone sockets go straight to surge protectors. Everything else is connected on the protected side.

[hoggyland]

Thanks

You both seem to be of the same opinion and I have connected the microfilter to the output of the Surge protector. There does not seem to be a problem

Thanks

[ACtheTROLL]

OFTEN struck by lightening !!!!!!!!!!
roj ... do you live in the tower of unseen university?

A strike is different to a near miss ... a protector will stop a near miss .... nothing will stop a strike

if it's a problem bt use gas discharge tubes in the exchanges - and they will stop anything except a ground 0 hit. a cup of tea and a couple of fondant fancies should persuade most engineers to deliver a couple.

the only drawback is you need a 3 foot earhspike which is seperate to the bonded earth to connect them to

[rojash]

ACtheTROLL, When you are looking at a melted telephone, and a frazzled motherboard, you are not really bothered about the technicalities of whether it's a strike or a near miss. I've lost two phones, 3 modems and a printer to lightning (before i installed the protectors).

Here in Greece, most electricity meters are encased in the concrete gateposts: our friend's gatepost was hit, and it literally exploded, and the fusebox in the house was blown out of the wall.

When I lost the printer, I was sitting in my office with the windows open and the (metal) shutter closed. I actually saw a blue bolt shoot between the louvres of the shutters, and all my gear went down. Everything survived bar the printer - the psu was roasted. (Of course. I wouldn't expect a protector on the phone line to avert something like that).

My current set up is like this:

Phone line to protector 1, in office
Protector to filter
filter to ADSL router on one side and ISDN box on the other (I have ADSL over ISDN)
Output of second ISDN line to protector 2
protector 2 to line to house
protector 3 in house to phone.

[ACtheTROLL]

rojash
jeezlouise .... do you walk round in a tinfoil hat as well? ;-)
I'd certainly sell my kite
can't imagine how anything survives that close - must be like an emp.
the GDTs are good ... but they depend on a good earth

we haven't had lightening here since before we moved house (12 months) we are a little more exposed (and alone!) ... so maybe i'd better do something about it.