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Post subject: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibrato
Posted: Sun Sep 09, 2012 4:27 pm
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I'm in Europe and I've bought my dream amp about 6 months ago. The problem exist from the beginning. One of the great things of this amp is the organic charming Vibrato.
Now, this only happens when the REVERB/VIBRATO pedal is plugged, wich is the only way to get the vibrato on. When ON, until warmer, the vibrato is a little noisy but then, works OK, although, "pulsing", when not playing or even whit out the guitar plugged. But when I switch it OFF the vibrato on the pedal, it starts a horrible noise, like a storming approaching from far to near.
A studio's sound engenier told me that happend to him with the same model and solved the problem with some kind of folded paper, near one of the tubes, but he can't remember how he did it and he lives in another country, now.
Is this a know issue or I should just get it to the store (know I will be with out it for more than a month)?

Thanks for all the help.


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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 4:37 pm
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Gost. There are some active discussions regarding this "noise" and reverb subject
and the '65 reissues. Check around. Toppscore :)


http://www.fender.com/community/forums/viewtopic.php?f=13&t=75034

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 4:42 pm
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Toppscore wrote:
Gost. There are some active discussions regarding this "noise" and reverb subject
and the '65 reissues. Check around. Toppscore :)


http://www.fender.com/community/forums/viewtopic.php?f=13&t=75034

http://www.fender.com/community/forums/viewtopic.php?f=13&t=75034&hilit=+%2765+reissue+hum

]

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 6:02 pm
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Toppscore wrote:
Gost. There are some active discussions regarding this "noise" and reverb subject
and the '65 reissues. Check around.


DUH!

The gentleman has a vibrato problem.

V-I-B-R-A-T-O

He made no mention of a "reverb" issue.

Dietary deficiencies often manifest themselves with such cognitive dysfunction.

Too few complex proteins and too many hydrogenated carbohydrates.

Like this......

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See your physician.

Soon.

:lol:

Arjay

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 6:08 pm
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umgajo wrote:
I'm in Europe and I've bought my dream amp about 6 months ago. The problem exist from the beginning. One of the great things of this amp is the organic charming Vibrato.
Now, this only happens when the REVERB/VIBRATO pedal is plugged, wich is the only way to get the vibrato on. When ON, until warmer, the vibrato is a little noisy but then, works OK, although, "pulsing", when not playing or even whit out the guitar plugged. But when I switch it OFF the vibrato on the pedal, it starts a horrible noise, like a storming approaching from far to near.
A studio's sound engenier told me that happend to him with the same model and solved the problem with some kind of folded paper, near one of the tubes, but he can't remember how he did it and he lives in another country, now.
Is this a know issue or I should just get it to the store (know I will be with out it for more than a month)?

Thanks for all the help.


Did you buy this amp new? If so take it back immeadiately. If bought used, you might try checking the preamp tubes to make sure they are seated in thier base properly sounds like it very well could be a bad preamp tube. You might also try replacing tube V5 if I am reading the schematic correctly (5th tube from the right).

And Lastly did you check to make sure the vib/rev pedal is plugged in correctly? And when all else fails take it to a qualified amp tech.

HTH

T2

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 6:09 pm
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umgajo wrote:
I'm in Europe and I've bought my dream amp about 6 months ago. The problem exist from the beginning. One of the great things of this amp is the organic charming Vibrato.
Now, this only happens when the REVERB/VIBRATO pedal is plugged, wich is the only way to get the vibrato on. When ON, until warmer, the vibrato is a little noisy but then, works OK, although, "pulsing", when not playing or even whit out the guitar plugged. But when I switch it OFF the vibrato on the pedal, it starts a horrible noise, like a storming approaching from far to near.
A studio's sound engenier told me that happend to him with the same model and solved the problem with some kind of folded paper, near one of the tubes, but he can't remember how he did it and he lives in another country, now.
Is this a know issue or I should just get it to the store (know I will be with out it for more than a month)?

Thanks for all the help.


umgajo,

First of all, the referenced links have nothing to do with your problem. The referenced thread is a reverb issue. Your problem is with the vibrato. Totally separate and unrelated circuits.

You clearly have a problem in the vibrato circuit. It could be something as simple as a bad pedal or tube. If you are comfortable doing so, you could swap the vibrato tube, V5, with a known good tube. See schematic below. If you are not comfortable doing that, or it doesn't solve the problem, send/take it back to the dealer for a warranty repair or replacement.

Finally, there is nothing you can fix in the amp with a folded piece of paper. Your friend does not know what he is talking about.

Good luck.

http://support.fender.com/schematics/gu ... ematic.pdf

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Last edited by bluesky636 on Sun Sep 09, 2012 6:40 pm, edited 1 time in total.

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 6:11 pm
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Welcome back Arjay.

Hey T2.

You guys beat me to it. Well, at least the OP now has the correct information so he can hopefully get his problem resolved. :lol:

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 6:27 pm
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"Secondly, the reverb/vibrato pedal is not required for either reverb or vibrato to function."

Reverb is always on, but the trem only works when the footswitch turns it on. I'm pretty sure you know that -- Twins, Deluxes, Supers are all the same way -- and you were distracted/upset by the inane and irrelevant posts earlier in the thread.


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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 6:41 pm
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strayedstrater wrote:
"Secondly, the reverb/vibrato pedal is not required for either reverb or vibrato to function."

Reverb is always on, but the trem only works when the footswitch turns it on. I'm pretty sure you know that -- Twins, Deluxes, Supers are all the same way -- and you were distracted/upset by the inane and irrelevant posts earlier in the thread.


I misread the schematic and have corrected my error. Thanks. :oops:

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Sun Sep 09, 2012 8:20 pm
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I must be getting old. I just can't hold my attention long enough to get anything out of this.







:lol: :P

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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Mon Sep 10, 2012 5:41 am
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Thanks, everyone!
The problem is with the vibrato and/or pedal. Not the reverb.
I'm aware that the vibrato only works with the foot pedal. If it worked without the pedal I would test it to compare with/without pedal plugged.
Well the amp works ok without the pedal but I need the vibrato. I've been using a external tremolo pedal without the one from the amp but I love this amp because of his own vibrato, wich I can't use because of the issue.
On the back side I can find 10 tubes (6 from the right and 4 more in a special protected place).
Maybe one of the tubes (probably the vibrato one, I don't know) is not well placed...
But I don't know wich one... Or maybe the problem is with the pedal itself but I don't have another pedal to compare.
I've read "65 Twin Reverb Reissue - Reverb Hum" topic. It is not the same problem.
I'll try to record a sample to the next post...


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Post subject: Re: 65 Twin Reverb - pulsing or strong noise - Pedal - Vibra
Posted: Mon Sep 10, 2012 5:56 am
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[quote="umgajo"]On the back side I can find 10 tubes (6 from the right and 4 more in a special protected place).
Maybe one of the tubes (probably the vibrato one, I don't know) is not well placed...quote]

There should be a tube chart inside the amp showing the location of all the tubes. You want V5.

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