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RF Man Amplifiers

Discussion in 'Amplifiers' started by Mudfoot, Aug 29, 2018.

  1. Mudfoot

    Mudfoot Sr. Member

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    https://www.rflinear-amplifiers.com/


     

  2. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Now I just need to figure out a good way to get 50vdc at 50a.
     
    rabbiporkchop, BenMara and Robb like this.
  3. Captain Kilowatt

    Captain Kilowatt Professional Amateur
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    Ebay is full of blade server power supplies for cheap. I picked up two HP units that make 50 volts at 60 amps each. I paid $35 for one and a little bit more for the other. You need to add a power cord/switch and they usually run off 220 volts.
     
  4. StrangeBrew

    StrangeBrew Sr. Member

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    Some of the new electric bikes, scooters and other such stuff use 50 volt batteries, a charger for one of these and a bank of batteries would be an option. Captain Kilowatts suggestion is probably better provided you have a wall outlet that's up to the task but if you're not a bucket mouth the battery route would probably get you by.
     
  5. nomadradio

    nomadradio Analog Retentive

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    I had a notion of taking four of the LiPo "jump starter" battery packs and wiring them like a motor maul.

    On receive, they charge from the vehicle's 13.8-Volt supply in parallel.

    When you key the mike, relays put them in series for 48 Volts, more or less.

    Seemed like you could regulate the recharge current, to prevent overloading a wimpy vehicle's alternator.

    Filtering the wires that recharge the batteries would be simpler if the current draw to recharge is limited to 10 or 20 Amps.

    Would simplify keeping amplifier RF out of the vehicle's wiring harness.

    Never have tried it.

    73
     
  6. StrangeBrew

    StrangeBrew Sr. Member

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    I'm not up on the actual inner workings of motor mauls, how hard would it be to build one that would put four batteries in series?

    Note that I'm not going to build one myself so a technical explanation isn't necessary, just wondering if it's something that would be feasible for your better amp builders to jump on.
     
  7. Mustang 131

    Mustang 131 Well-Known Member

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    Pretty cool stuff.
     
    Mudfoot likes this.
  8. 9C1Driver

    9C1Driver Sr. Member

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    I would like to see some reviews before I got all excited. Are they class AB? Clean output? So many questions and very little information on the site.
     
  9. rabbiporkchop

    rabbiporkchop Well-Known Member

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    Supposedly class AB
     
  10. Mudfoot

    Mudfoot Sr. Member

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    He's been posting on various Facebook ham radio pages.
     
  11. kopcicle

    kopcicle Well-Known Member

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    Just a reminder for accuracy
     
    rabbiporkchop and Dmans like this.

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