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palomar 300a

Discussion in 'CB Radio Gear SwapShop' started by Rf express, Dec 23, 2017.

  1. Rf express

    Rf express New Member

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    I have recently picked up 2 black face chrome top 300a's only 1 power supply from a SK both do power up and all tube's glow fan's work have not tried to key em don't have a rig with low enough power to try,looking for something that my Ts 130se will work with.


     

  2. Rf express

    Rf express New Member

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    Snapshot_20171222.JPG
     
  3. kopcicle

    kopcicle Well-Known Member

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    Another thought: You might try adding negative control bias to the ALC INPUT of the rig's accessory connector. This is an old trick that works pretty well with the TS-520S, TS-820S, TS-530S etc. and it might work with the TS-130se also (haven't personally tried it).
    I have used it on a IC-735, TS-120, TS-830S ...
     
  4. nomadradio

    nomadradio Analog Retentive

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    Consider for a moment that the band selector on this amplifier is a fraud.

    Mostly.

    The tuned-input circuit found in most revisions of this model is resonant at 11 meters only. Will probably retune for 10 meters without a lot of tweaking.

    But the other bands will not perform properly. Your drive signal will be reduced on the other bands, and the SWR on the input side of the amplifier will be really high. A modern solid-state ham radio that reduces power when it senses a high SWR just won't put much into it on those bands.

    The 300A does have one thing going for it. The "High/Low" selector will totally bypass the two driver tubes in "Low" side. There will still be that pesky 11-meter input circuit on the four final tubes, but the radio drives them directly in "Low". You can unplug the two driver tubes altogether and the amplifier will still work on Low side.

    This also means that you have two 11-meter only input circuits. The one for Low side is mounted behind the High/Low switch. The one for high side is tucked under the driver tubes near the front driver tube.

    Each of these normally gets set separately on the side where it's active.

    73
     
  5. 15minigrass

    15minigrass Active Member

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    this would work great with my low power/wattage Browning S23/R47. Is the power supply connected via accesory plug or can be wired in?
     
  6. Rf express

    Rf express New Member

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    the power supply connects via factory Palomar plug that plugs into the amp and then the amp plugs into standard 110 wall socket
     
  7. Rf express

    Rf express New Member

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    have tested both and they do work
     
  8. Sonar

    Sonar Well-Known Member

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    Price?
     
  9. Rf express

    Rf express New Member

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    $400 plus the ride
     
  10. ShadeTreeMechanic

    ShadeTreeMechanic 808 On The North Side of Dover

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    Where are you located?
     
  11. Rf express

    Rf express New Member

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    powell missouri 65730
     
  12. Dave11meterdude

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    Want to sell one?
     
  13. Rf express

    Rf express New Member

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    no all or nothing make a offer
     

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