Should I put a 1960 P12q in my 5e3 or will it destroy 50yr old paper cone & coil?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Two Steps, Mar 15, 2015.

  1. Two Steps

    Two Steps Supporting Member

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    I just got a Lil Dawg 5e3. I had Jim reverse the Paul C mod and put the 12 watt tranny instead of the 25 watter that was in there. I want this to be my classic rock machine, no need for a lot of clean.

    The problem is it has a 16 ohm speaker in it. Also, I want an alnico in there. I remembered I have a 1961 Hammond Spinet organ that has a mint as can be - for 50 years old - p12q. Obviously the paper on the speaker is 50 years old too.

    Will the 12 watt 5e3 destroy the p12q? I could pick up a Weber Sig12s if so.

    Lemme know!
     
  2. mark norwine

    mark norwine Member

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    The paper is dried out, the glues are dried out....and who knows what condition the VC is in....

    You might get lucky. Odds are you won't.
     
  3. swiveltung

    swiveltung Member

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    :aok
     
  4. RiftAmps

    RiftAmps Member

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    The original P12Qs were 15w speakers (not 40w like the reissues), as a rule of thumb you should treat vintage Jensen speakers as having half their original power rating.

    I wouldn't put that in there, go for something new production
     
  5. Two Steps

    Two Steps Supporting Member

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    Then it's settled. Thanks guys!
     
  6. RussB

    RussB low rent hobbyist Silver Supporting Member

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    What good is it if you don't use it? Run it. If it blows, have it reconed.
     
  7. zenas

    zenas Member

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    I'm with RussB. So what it might blow get it reconed.
    Probably a smooth cone anyway being an organ pull.

    Or sent it to me I gave one to my brother and he ain't giving it back.
     
  8. J M Fahey

    J M Fahey Member

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    Blowing it is is like never using it, with the difference it is forever.

    Keep it and use it with a single 6V6 output amp for killer sound and extended life.

    Buy a reissue for your 5E3 .

    Do you know why original P15Q and tons of other fine original speakers are rapidly disappearing?

    Because of people who want to PROVE what kind of daredevil guys they are :(
     
  9. wyatt

    wyatt Member

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    I agree with RussB and zenas.

    Paper cones are all pulp and can't last forever, even if never used they'll still deteriorate. If they are good, they'll hold up to a 5E3; if not, a reconed P12Q is better than the RI.
     
  10. Two Steps

    Two Steps Supporting Member

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    Here it is; I don't know if it's smooth or ribbed yet. Haven't pulled it yet and it's at my parents house.
    [​IMG]
    [​IMG]
    [​IMG]

    So we shall see...I'm only running her on 2-3 (full volume with the 5e3 but definately not all the gain going to 12). I wonder how many watts I'm throwing at it at 3 out of 12?
     
  11. zenas

    zenas Member

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    They're "rapidly disappering because most of them are in organs rotting in or headed to the landfill.
    This one got saved and now it should be used, enjoyed and maybe reconed.

    Come on if you can't put a real Jensen P12Q in a 5E3 what's the point of having it?
     
    Last edited: Mar 15, 2015
  12. wyatt

    wyatt Member

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    I can see the ribs in the pics. Being a '60, might the seamless pulp cone.
     
  13. Two Steps

    Two Steps Supporting Member

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    So is this like the Weber 12a125? What does seamless pulp mean. Is that half way between ribbed and smooth?
     
  14. wyatt

    wyatt Member

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    Traditional Jensen cones were cut, rolled and glued at the seam. But for a while Jensen used cones where the pulp is pressed/molded into the cone shape, so no seam was necessary (this is how Celestions were made as well). These were also ribbed. Weber's versions version of the pulp cone is their 12A125S.

    I would only be guessing at which ribbed cone is being used by those pics.
     
  15. slider313

    slider313 Silver Supporting Member

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    Running it and having it blow could also lead to a blown output transformer.
     
  16. J M Fahey

    J M Fahey Member

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    Which can also be rewound ;)

    Soon enough that 5E3 will become like George Washington's axe ;)
     
  17. zenas

    zenas Member

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    If this speaker goes bad it'll start with a voice coil rub, it'll sound bad. he'll shut it off, say "****" and get a recone or replace it.
    Hell I'm running the original 1962 C12R in a 62 Reverberocket about the same wattage amp with an R speaker that was even less wattage originaly than the Q we're talking about here.
    My amp was stored in God knows where, was so musty when I got it it took months before I could take it in the house.
    I'm suprised that 53 year old speaker is still working !

    Organ pulls on the other hand normally sat in well an organ in some grandma's living room for 50 years. Then are sold or more likely giving away when the relitives figure out that they aren't worth anything.
     
    Last edited: Mar 16, 2015
  18. schmidlin

    schmidlin Member

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    This man here says everyone in this thread is a pansy!

    [​IMG]
     

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