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front end

  1. C

    FM - Front End Troubleshooting Tips?

    Hello AKers. Have a Marantz 2245 where the front end of FM seems to be struggling - but I can't seem to narrow down a particular source. Stereo FM isn't functional - stereo lamp is good - works in other modes except for AM. The tuner meter doesn't seem to particularly move as I run through the...
    • CaseyWKC
    • Thread
    • 2245 front end if repair marantz stereo fm troubleshooting
    • Replies: 34
    • Forum: Marantz Audio
  2. PE9ZZ

    Front End LO/RF Tracking and Alignment

    Some time ago I made a spreadsheet in order to optimize the tracking of the local oscillator and the RF circuits in an FM front end. The most interesting finding is that this alignment should not take place at the band ends (88/108 MHz) but rather at 90 and 105 MHz. In case of the well-known...
    • PE9ZZ
    • Thread
    • fm front end local oscillator tracking tuning alignment
    • Replies: 20
    • Forum: Tuners
  3. K

    Dynaco FM-5 Front-end Question

    Hi everyone, Could anyone tell me the identity of the FETs that are used in the Dynaco FM-5 RF front end? Thanks, Keith
    • kpmadden
    • Thread
    • dynaco fet fm-5 fm5 front end
    • Replies: 2
    • Forum: Tuners
  4. R

    Sony ST-SA3ES problem & recapping

    Hi, I have Sony ST-SA3ES tuner for long years from 1997 when I bought it brand new. I am listening FM only, never AM. A few years ago appears a problem - the tuner suddenly & arbitrarily started "lose reception". It start hissing for a while then knock - and everything goes back to normal...
    • Robinsons
    • Thread
    • capacitors dry soldering front end mastech my68 plate recapping sony st-sa3es
    • Replies: 1
    • Forum: Tuners
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