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  1. #1
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    Default Princeton reverb 65 reissue tremolo speed mod?

    I have just bought a Princeton Reverb 65 Reissue, love the sound but the tremolo speed is a bit fast for me even at position "1", I'd like it to start slower. I was reading that it's possible to slow it down by replacing a capacitor in the circuit, anyone has done it and can tell me how to identify the capacitor to replace, what to use, etc? Is it something easy to do? I'm no expert in electronics and circuits but I can use a solderer and do easy jobs if I know what to do. Thanks!
    Last edited by Alessandro; 11-05-2017 at 01:53 PM.

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    There are three caps in the trem circuit: Two .01's and a .02. You can slow the trem speed down by replacing the .01's with .02's.

    Know this: the filter capacitors in your amp store enough voltage to fry you, so unless you know which ones they are and how to bleed them, you'd be best off having an amp tech switch out the two trem caps (a very quick process for which he/she should not charge much).
    The Human Torch was denied a bank loan.

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    Wow... definitely don't want to risk being fried I'll try to find an amp tech here in Dublin to talk about this! Thanks

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    Mike knows his stuff Please take his advice, good luck and report back.

    Ron
    Ron

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    Will do! Looks like I've found a tech to do the job. By the way, am I the only one to think the tremolo on this amp starts pretty fast..? Is it a Princeton Reverb 65 thing or all Fender blackface are the same?

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    My PR was a '66, not a reissue, but I never used the trem, so, strangely enough, I can't answer that question. But from what I've read on a lot of forums, you are definitely not alone.
    The Human Torch was denied a bank loan.

  7. #7
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    Quote Originally Posted by tele savalas View Post
    There are three caps in the trem circuit: Two .01's and a .02. You can slow the trem speed down by replacing the .01's with .02's.

    Know this: the filter capacitors in your amp store enough voltage to fry you, so unless you know which ones they are and how to bleed them, you'd be best off having an amp tech switch out the two trem caps (a very quick process for which he/she should not charge much).
    If the amp is turned off when the tubes are hot (i.e. so you can play through it) the filter caps will discharge themselves.
    I'm a riddle, wrapped in a mystery, inside an enigma.

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    In the amps I built I measured significant voltages across the filter caps when I powered down.
    Last edited by tele savalas; 11-10-2017 at 06:25 PM.
    The Human Torch was denied a bank loan.

  9. #9
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    Captain B, I always enjoy your posts and respect your opinion, but that kind of talk is likely to get one killed or seriously buzzed. Don’t EVER work on an amp that hasn’t been fully discharged.
    "No matter how smart you thought you were, you are actually way less smart than that." - David Foster Wallace, from Infinite Jest

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    "You could put an eye out with that thing!"

    Seriously, the current stored in amps is nothing to mess with. Don't try this at home!
    "Life's too short not to enjoy great tone."

    Some contend that rock 'n roll is bad for the body & bad for the soul
    Bad for the heart, bad for the mind, bad for the deaf & bad for the blind.
    It makes some men crazy and they talk like fools.
    Makes some men crazy and they start to drool.

 

 

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