ad: jbsims

Kenwood TS-850S SSB Filter

Discussion in 'Discussions, Opinions & Editorials' started by SP9O, Dec 3, 2012.

Thread Status:
Not open for further replies.
  1. SP9O

    SP9O Ham Member

    Hello fellow
    I have a Kenwood TS-850S
    It can be assumed large filter ssb
    FILTER YG-455S1 2400 Hz SSB Filter [455 kHz IF]
    I greet
    8875838700_1354558693.jpg 9858387000_1354558697.jpg
     
  2. W0UZR

    W0UZR Ham Member

    What do you want to know about it? There's one of those in my 850 too.
     
  3. WA7PRC

    WA7PRC Ham Member

    The TS850S comes with the YK88S-1 filter installed. The only optional filters shown in the user manual are:
    [table="class: grid, align: left"]
    [tr]
    [td]PN[/td]
    [td]DESCRIPTION[/td]
    [/tr]
    [tr]
    [td]YG-455C1[/td]
    [td]CW Filter 500 Hz, 455 kHz IF[/td]
    [/tr]
    [tr]
    [td]YG-455CN1[/td]
    [td]CW Filter 250 Hz, 455 kHz IF[/td]
    [/tr]
    [tr]
    [td]YK-88C1[/td]
    [td]CW Filter 500 Hz, 8.83 MHz IF[/td]
    [/tr]
    [tr]
    [td]YK-88CN1[/td]
    [td]CW Filter 270 Hz, 8.83 MHz IF[/td]
    [/tr]
    [tr]
    [td]YK-88SN1[/td]
    [td]SSB Filter 1.8 kHz, 8.83 MHz IF[/td]
    [/tr]
    [/table]
    FWIW, the InRad filters have steeper skirts and IIRC, greater ultimate attenuation outside of the passband.
     
  4. SP9O

    SP9O Ham Member

    OK THANK YOU.
    FILTER YG-455S1
    Connection to the TS-850S
    WILL fit
    ALL OK PIN ALL OK
     
  5. WB2WIK

    WB2WIK Premium Subscriber

    Yes the YG-455S-1 will fit the TS-850S and just plug in.
     
  6. WA7PRC

    WA7PRC Ham Member

    It's not listed in any documentation I have for my TS850. However, with the YK-88S1 filter, it would result in steeper skirts and more rejection of signals that are outside the passband. I'd still just use a single filter from InRad.

    DL2AU created a nifty Kenwood filter vs rig chart: http://www.dl2au.de/html/kenwood_filter.html. Since my German is good enough to only get my face slapped, I used Google Translate to read the notes.
     
  7. WB2WIK

    WB2WIK Premium Subscriber

    The YG will work and will fit, it's just not as good a filter. The YG filter is the one that came with the 850's little brother, the TS-450S.
     
  8. VA6AW

    VA6AW Ham Member

    I have an old TS430S that no longer works. Thinking of selling or trading the YK88c and YK88S filters for something that will work in my TS140S. Would like a narrower and cleaner CW filter. Does inrad have something that I could install without too much trouble.
     
  9. WA7PRC

    WA7PRC Ham Member

    That's why I wouldn't bother, and use an InRad filter instead.

    You have four InRad filters from which to choose: 500/400/250/125 Hz bandwidth. I use a Kenwood 250 Hz BW filter in my TS850. It works FB with the slow tuning rate. Because of leak-through on strong signals, I wish it was an InRad filter.
     
  10. VA6AW

    VA6AW Ham Member

    Tnx for the info Bryan. The link you provided gives me some idea as what I'm looking to do here.

    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.
     
  11. WA7PRC

    WA7PRC Ham Member

    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: Dec 5, 2012
  12. SP9O

    SP9O Ham Member

  13. WA7PRC

    WA7PRC Ham Member

    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.
     
  14. SP9O

    SP9O Ham Member

    OK Thank you for your colleagues.
    BUY FILTR YG-455S1
     
Thread Status:
Not open for further replies.

Share This Page

ad: dxeng