Connect with us

What type of rf filter is this?

Discussion in 'Troubleshooting and Repair' started by krugerand, Oct 22, 2010.

Scroll to continue with content
  1. krugerand

    krugerand

    2
    0
    Oct 22, 2010
    I am trying my best to fix the electronics in a mass spectrometer.One of the voltage generation boards doesnt receive any power at all (normally 230V AC is going into it) and I was able to trace live power only up to an RF filter before the power gets to the high voltage board.

    I think I need to replace this RF filter because I can measure 160 ohms through one of the two paths through the filter but 38 Megaohms through the other path(which I assume means it is not an open path).

    The filter casing has the following printing on it.

    F&T 9768
    0.1 uF + 2 X 2500 pF
    + 2 X 2 mH 4A
    HSF560 2/94
    250V~

    Does anyone know what type of RF filter this is exactly?:confused: I think it was manufactured in
    Germany in 1994 but I can't find it through Google. Maybe because its too old.

    Any ideas and suggestions are appreciated.

    Thanks, krugerand.
     
  2. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    That looks like an ordinary mains RFI filter. On rare occations the inductor in these can develop a break. You can replace it with just about any similar rated product.
     
  3. krugerand

    krugerand

    2
    0
    Oct 22, 2010
    Thanks for the info.

    Yes, one path through the filter is open circuit so I guess as you say one of the inductors must have blew.

    Would a part 5VR3 be a suitable replacement?
    http://www.cor.com/PDF/R.pdf

    The inductance and capacitance values are different though. Would that make a lot of difference in the filtering?

    krugerand
     
  4. Resqueline

    Resqueline

    2,848
    2
    Jul 31, 2009
    It'll work just nice, but it might be more expensive than neccessary because it's a two-stage filter whereas the original filter is just one stage.
    It will surely make a difference (to the better), but the exact filtering effect is very non-critical on such device mains inputs.
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-