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Thread: PL 400 VU meter

  1. #1
    Forum Veteran AngrySailor's Avatar
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    PL 400 VU meter

    I pulled my PL apart as one VU meter stopped working a while back. It reads open while the other reads 59 ohm. Tabarnak. Nudies coming. I pulled the meter completely apart and found that where the wire coil leaves the stationary body and transitions to the swinging coil, it's open there. It's wound like a clock spring to allow the meter to sweep. If I carefully get my multi meter on the broken end, the meter sweeps and reads about 56 ohm.

    Any thoughts on a repair?
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    "Turn that jungle music down, 'least until we're outta town..." -D. Fagen

    "I don't mind this and I don't mind that, but when it comes to this, fvck that" -Rodney Deagle



    Originally Posted by laatsch55

    "BTW....one of the few ways i HAVE NOT blown up a 400!!"

  2. #2
    Forum Veteran AngrySailor's Avatar
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    If anyone has a meter that's smashed but the workings are good I could make two from one. This would probably be the best/only option as I can't see myself having a steady enough hand to fix this one!
    "Turn that jungle music down, 'least until we're outta town..." -D. Fagen

    "I don't mind this and I don't mind that, but when it comes to this, fvck that" -Rodney Deagle



    Originally Posted by laatsch55

    "BTW....one of the few ways i HAVE NOT blown up a 400!!"

  3. #3
    Forum Veteran AngrySailor's Avatar
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    Come on der b'ys! One of you scallywags got a busted up 400 series I in yer basement with a meter that's "very best"! Send that cunny where I'm too!
    "Turn that jungle music down, 'least until we're outta town..." -D. Fagen

    "I don't mind this and I don't mind that, but when it comes to this, fvck that" -Rodney Deagle



    Originally Posted by laatsch55

    "BTW....one of the few ways i HAVE NOT blown up a 400!!"

  4. #4
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    Halfbiass...Electron Herder and Backass Woof
    No such thing as a busted up non-rebuildable 400 any more.....
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  5. #5
    Forum Veteran Northwinds's Avatar
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    Fondler errrr... fan of all Nav's avatars
    Finding original meters for these amps is near impossible. Anybody ever find suitable replacements yet made by other manufacturers?
    "I really can't begin to describe what happens at that frequency when you hit that SPL, but it's serious. We saw a mouse stagger out of a crack in the concrete floor and die"
    Quote Originally Posted by laatsch55 View Post
    Yweblwrs...
    Quote Originally Posted by skynyrd77
    The only toilet I have seen that didnt swirl was in a trailor
    Quote Originally Posted by TheWOPLwhiffer View Post
    now I need a Dim Bulb Tester to test my Dim Bulb Tester
    Quote Originally Posted by lattiboy, post: 11205733, member: 245918
    my eyes were forced shut by the air pressure change
    An audiophile is someone who's stereo is worth more than his car

  6. #6
    Forum Veteran AngrySailor's Avatar
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    I could work with one run over by a truck, my meter case, face plate, everything is good. I just need a good coil. Even if the needle is bent/gone I can fix that, but my coil would take a damned jeweller to repair
    "Turn that jungle music down, 'least until we're outta town..." -D. Fagen

    "I don't mind this and I don't mind that, but when it comes to this, fvck that" -Rodney Deagle



    Originally Posted by laatsch55

    "BTW....one of the few ways i HAVE NOT blown up a 400!!"

  7. #7
    Forum Veteran Northwinds's Avatar
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    Fondler errrr... fan of all Nav's avatars
    If the coil is a standard size in all meters, I can hook you up with a VU one out of a cassette deck. I guess you would have to calibrate it though
    "I really can't begin to describe what happens at that frequency when you hit that SPL, but it's serious. We saw a mouse stagger out of a crack in the concrete floor and die"
    Quote Originally Posted by laatsch55 View Post
    Yweblwrs...
    Quote Originally Posted by skynyrd77
    The only toilet I have seen that didnt swirl was in a trailor
    Quote Originally Posted by TheWOPLwhiffer View Post
    now I need a Dim Bulb Tester to test my Dim Bulb Tester
    Quote Originally Posted by lattiboy, post: 11205733, member: 245918
    my eyes were forced shut by the air pressure change
    An audiophile is someone who's stereo is worth more than his car

  8. #8
    Forum Veteran AngrySailor's Avatar
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    Quote Originally Posted by Northwinds View Post
    If the coil is a standard size in all meters, I can hook you up with a VU one out of a cassette deck. I guess you would have to calibrate it though
    Thanks, that may be an option but would require machining a bracket to hold a different coil and calibrating electrically. The PL coil (good one) specs 58 ohm. I could maybe adapt something but it would have to be matched for sweep range and impedance. It's possible, And my have to be attempted, I just thought someone would have a meter that was broken, or burned from the lights, otherwise junk, but had working guts. The amp works fine without, but it bothers me as I'm sure you can understand!
    "Turn that jungle music down, 'least until we're outta town..." -D. Fagen

    "I don't mind this and I don't mind that, but when it comes to this, fvck that" -Rodney Deagle



    Originally Posted by laatsch55

    "BTW....one of the few ways i HAVE NOT blown up a 400!!"

  9. #9
    Administrator
    laatsch55's Avatar
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    Halfbiass...Electron Herder and Backass Woof
    Any Pl meter I've come accross that doesn't work has had a bad coil. The other parts are easy to get, I have a lot of broken coil meters...
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  10. #10
    Forum Veteran AngrySailor's Avatar
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    So I was able to get a fine probe into the guts if this meter and the coil tests good aside from the one clock spring like coil that goes between the stationary and moving elements. There is a solder pad on the swinging coil and one on the stationary end and the fine wire makes about three turns to allow the meter free movement. I spoke to a jeweller today and will be
    dropping the meter off tomorrow. He seems to think he can repair it. The impedance tests good at about 60ohm so if he can replace it with a suitably flexible coil it should read damn close. I'm afraid of what he is going to give for an estimate though, probably replace it with 24k gold wire!

    Got my fingers crossed b'ys!
    "Turn that jungle music down, 'least until we're outta town..." -D. Fagen

    "I don't mind this and I don't mind that, but when it comes to this, fvck that" -Rodney Deagle



    Originally Posted by laatsch55

    "BTW....one of the few ways i HAVE NOT blown up a 400!!"

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