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Thread: Kenwood TS-850S SSB Filter

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  1. #11

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    Quote Originally Posted by VA6AW View Post
    I did hear that changing the filters on the 140's could improve the overall receiver front end noise level which is very high here. Or its just the radio design. Not sure as I just started to work with this rig.
    In general, the things I like about the InRad vs most OEM filters are:
    • Steeper skirts (the ratio of bandwidth at -60dB to the bandwidth at -6dB). 1:1 is ideal but 1.5:1 is about as good as they get.
    • Greater ultimate rejection of signals outside the passband. IMO, better antennas require better ultimate rejection.
    • Less passband ripple or flatter passband "frequency response".

    Since it's after the front end, an IF filter can't make the front end quieter. However, a narrower and/or sharper bandpass results in lower noise power delivered to the detector. On some signals, I can hear them much better when switching to a narrower filter. A narrower/sharper filter also lets less QRM through to act on the receiver's AGC. To a point, it's silly to use an IF filter that's wider than the signal you're trying to hear (very narrow filters tend to ring-g-g-g).
    Last edited by WA7PRC; 12-05-2012 at 08:39 AM.

  2. #12
    Join Date
    Sep 2009
    Location
    Poland/A-ów
    Posts
    29

    Default

    Price: $ 170.00
    the price is high


    Filter 1800 Hz
    455.0 kHz
    Why do not you to ts-850S
    .

    http://www.inrad.net/product.php?pro...&cat=56&page=1
    .
    6191545800_1354720889.jpg

  3. #13

    Default

    Quote Originally Posted by SQ9OKY View Post
    Price: $ 170.00
    the price is high
    You don't get top performance for the least cost. When I can afford it, my TS850 will be changing to the superior InRad filters. Then, my Kenwood filters will be for sale to... eh... hams who consider cost the most important (or only) factor.

  4. #14
    Join Date
    Sep 2009
    Location
    Poland/A-ów
    Posts
    29

    Default

    OK Thank you for your colleagues.
    BUY FILTR YG-455S1

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