A Station Owner Tinkers With an AM's Response Curve Reviving Vintage Processors

Discussion in 'Amplitude Modulation' started by K5UJ, Jan 15, 2019.

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  1. K5UJ

    K5UJ Ham Member QRZ Page

  2. W7TFO

    W7TFO Platinum Subscriber Platinum Subscriber QRZ Page

    On legacy processors:

    In my half-century of pushing audio through broadcast AM transmitters and antenna arrays this is what I've found apparent:

    The CRL stack or the Dorrorugh 310 always did and will always rule the roost.

    Modulator tubes were just collateral damage...

    WA3VJB and KD0DQZ like this.
  3. N1BCG

    N1BCG Ham Member QRZ Page

    As long as they were left powered on to avoid the wandering meter syndrome otherwise the FET bias pots would need to be brought out to the front panel with knobs.

    The SEPs are outstanding...
  4. W7TFO

    W7TFO Platinum Subscriber Platinum Subscriber QRZ Page

    Nobody turns stuff off in a radio station unless dumb.

    I've lost count of how many power switches were removed or shorted across.

    KD0DQZ likes this.
  5. KL7AJ

    KL7AJ XML Subscriber QRZ Page

  6. KD8DEY

    KD8DEY Ham Member QRZ Page

    Parasound 621A??!!
  7. K5UJ

    K5UJ Ham Member QRZ Page

    My decent audio boxes in the shack (CRL, Hnat-Hindes) don't have on/off switches. I love the old analog processors -- front panels, knobs, switches, no menus, no battery backup...
  8. N1BCG

    N1BCG Ham Member QRZ Page

    Exactly. But since the 310 *has* a power switch, hamateur ops should non-intuitively avoid using it. Had one of these at work (1350 AM) and two (plus four 610s) at home. Big Dorrough fan, and got to know them, their quirks, and Mike very well.
  9. W2VW

    W2VW XML Subscriber QRZ Page

    The thing that's ruining broadcast AM audio these days is ratings equipment.

    WOR out of NYC actually rings. Plain awful.
  10. K5UJ

    K5UJ Ham Member QRZ Page

    Does this gear tie in with the PPMs a sample of listeners are given to use?
    the 1000 station here had that same problem, but it went away awhile back. Is the ratings stuff on all the time or only during certain sample times?

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