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Wanted straight 4 pill base amp

Discussion in 'CB Radio Gear SwapShop' started by okie, May 19, 2020.

  1. okie

    okie Member

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    Looking to buy a used straigh 4 pill base amp. Will be driven with a RCI-2995DXCF
    PM me what you have.


     

  2. 999

    999 Well-Known Member

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    I wouldn't run anything less than a 6 with that radio. An 8 would be better,
     
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  3. okie

    okie Member

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    Thanks
     
  4. 357magnum

    357magnum Sr. Member

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    Okie , A local here runs a 2 x 4 Dave Made ( I think ) nice amp he can run it on the 2 pills or 4 pills & 2 driving 4 . He has NP's ( so he says ) & always sounds good to me . :) ( JMO )Stay Healthy & Safe ! 73 & God Bless ! Leo
     
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  5. 357magnum

    357magnum Sr. Member

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    It wouldn't let me edit my post for some reason ? Sorry it's a Fat Boy ! :confused: I just looked @ my paper work . I'm done trying to find one ! Just going to call them & have it built . But it won't be Cheap ! $$ :whistle:;):D
     
    okie likes this.
  6. 2NC995

    2NC995 DAN

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    I think what you'll find with those 2X4s is that the input to the drivers are padded, and the input to the finals are as well. Even at that, it doesn't take much of a radio to run one.

    It'd be interesting to see how they set that up being switchable...such as if the padding is bypassed when only the driver or finals are used.
     
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  7. Tokin

    Tokin 42Zero Tampa

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    If your cf has a high/low switch you could drive a 4 pill with the low side. If you are going to do that make sure you have an led installed in the front of the unit so you dont accidentally hit it on the high side.
    Pill amps are a double edged sword. The old transistors are no longer manufactured and are very, very expensive to replace. The only new transistors available are a lower quality chinese made transistors which wont handle what the reliable Toshibas did so again it pays to either
    keep your input wattage low and dont try to squeeze every last last watt out of it or buy an amp at least twice the size youre looking for. If you want a 4 you really need an 8 or more.
     
  8. 2NC995

    2NC995 DAN

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    +1

    I agree totally. Toshibas you have to go easy because they're pretty much irreplaceable, and DEIs and HGs you go easy because they cant take the heat.
     
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  9. nomadradio

    nomadradio Analog Retentive

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    Hmm. Smaller radio? Or larger amplifier?

    Just sounds like a mismatch of too much drive power for that size amplifier.

    73
     
  10. 2NC995

    2NC995 DAN

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    A 2995 produces substantially more power than I run into a DX1600.

    Of course I baby things...
     
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  11. Tokin

    Tokin 42Zero Tampa

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    100w dk, no more. Last forever...
    This 4 pill I just had reworked wont see more than 5w dk with 30w swing.
     
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  12. 2NC995

    2NC995 DAN

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    Hate to keep hijacking this thread...

    It’s been a long time since I ran a “builder” style amplifier. But still fresh enough in my memory to know it’s not exactly the same.

    Anyway, I run very low drive into my Texasstars. Finding good drive level recommendations on the internet isn’t easy. Lol.

    For example, with the DX500...you can easily find a number of posts telling folks NOT to buy one because they don’t have a big enough radio. I’ve been running mine with just 12-14 watts in since last fall and I’m super pleased. With that level - on par with a single final radio, it runs just fine and makes more power than a DX350. But importantly, it does it EASY. 20watts peak would probably be a good sweet spot. I see minimal gains on my watt meter after that.

    So, I’ve running my DX1600 just the same. The radio makes 30-35w, and the amp will show 900 with a tone. Modulated by voice, a little less. But I don’t care....she’ll run cool like that, and more importantly she’ll likely run for a long time.

    I tend to think that spec sheets mean little to nothing when it comes to the Chinese transistors, but theoretically, I should be operating at level low in the IMD curve. I can say, I always had RFI problems in the past...even with just a couple of 1446s. None, zero, zilch when running my stuff like this.
     
  13. Tokin

    Tokin 42Zero Tampa

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    357magnum, 2NC995 and S&W357 like this.
  14. S&W357

    S&W357 WDX-556 / 2NC357 Supporting Member

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    PowerMax 100 running a 4-pill here today

    upload_2020-5-23_11-50-16.jpeg

    upload_2020-5-23_11-52-49.jpeg
     
  15. TIN_CAN

    TIN_CAN Well-Known Member

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    I have run 150w into my dx1600 from my 2990DX with no problems, has toshibas in it, just keep it cool.
     
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