YG-455C-1 seems defective.

Discussion in 'Radio Circuits, Repair & Performance' started by W5NNX, Dec 22, 2020.

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  1. W5NNX

    W5NNX QRZ Member QRZ Page

    Any link to that previously documented issue?
     
  2. KA5IPF

    KA5IPF Ham Member QRZ Page

    What is the settings for the slope tune? Both should be wide open.
     
  3. W5NNX

    W5NNX QRZ Member QRZ Page

    Wide open, either with Narrow Engaged or not. But does affect receive bandwidth when cranked and the one filter is in line
     
  4. N8YX

    N8YX Ham Member QRZ Page

    KA0HCP likes this.
  5. W5NNX

    W5NNX QRZ Member QRZ Page

    930, not the 940.
     
  6. N8YX

    N8YX Ham Member QRZ Page

    Last edited: Dec 23, 2020
  7. HAMHOCK75

    HAMHOCK75 QRZ Member

    A nanoVNA can test filters like these in s21 ( transmission ) mode. I have used it to repair several Kokusai mechanical filters at 455 kHz with bandwidths of 600 Hz and 2.4 kHz. Price about $35 delivered.
     
  8. W5NNX

    W5NNX QRZ Member QRZ Page

    obtained another YG-455C-1 filter, installed, and radio works so appears it was a defective filter. A first for me.
     
    W1NB likes this.

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