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Post subject: 65 Twin Reverb - buzzer??
Posted: Sat Oct 25, 2008 1:18 pm
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Hi All,

Just got my first 'real' amp a couple of days ago, a 65 Twin Reverb (re-issue). The quality blows me away, until I turn the Reverb on & then I get a constant 'Buzz' thru the speaker.

It buzzes regardless of wether or not an instrument is plugged in, regardless of how the dials are set, etc etc..., It's dead quiet, until I hit the reverb button on the footswitch & then the buzzing starts....

Before I take it back to the dealer (an hour & a half away!) has anyone got any opinions???

Thanks in advance!


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Posted: Sat Oct 25, 2008 4:56 pm
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That should not be happening my friend!! Take it back! :(
Welcome to the forum! :)


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Posted: Sun Oct 26, 2008 10:59 am
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Hey Fhopkins,

Thanks for the welcome, am looking foward to hanging around here!

I keep messing with the amp hoping that the buzz will just go away, but it seems here to stay, so I guess it's a trip back to the dealers......

Regards,


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Posted: Wed Oct 29, 2008 7:02 am
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I just had an update,

I've spoken to Fender UK about this & they suggest (without hearing the amp) that it may be 'normal'...... (doesn't sound normal to me!)

Are there any other users on this forum with a vintage re-issue that has a similar reverb & if so do you 'get the buzz'?

Any feedback greatly appreciated!


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Posted: Wed Oct 29, 2008 7:08 am
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RhodesSeventyThree wrote:
I just had an update,

I've spoken to Fender UK about this & they suggest (without hearing the amp) that it may be 'normal'...... (doesn't sound normal to me!)

Are there any other users on this forum with a vintage re-issue that has a similar reverb & if so do you 'get the buzz'?

Any feedback greatly appreciated!


I just recently sold one that I kept for a few months ( because it was to heavy for me and I don't gig) but it is a very good amp and I had no noise problems at all! :)


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Posted: Fri Oct 31, 2008 4:16 pm
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I have a '65 Deluxe Reverb Re-issue. It has the same reverb circiut as the '65 Twin Reverb. I have no noise on mine. The noise you are decribing is not normal and I think you should take it back to the place where you bought it. It might just be the reverb tube. GENTLY tap on the 12AT7 tubes with a pencil or something while it's on and see what happens. If the noise stops, you have a bad tube. I've replaced 5 of the 9 tubes in my amp and I've only had it about 6 months.

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Posted: Sat Nov 01, 2008 11:56 am
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I've still got my '65 Twin Reverb reissue.
The reverb never did "buzz", and still doesn't.
The amp has been relatively trouble free. (considering that it's a tube amp)

My opinion is take it back. It may be just a bad tube, but then it could be something else too.


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Posted: Thu Nov 06, 2008 4:56 pm
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To update,

Hollis Prince, thanks for the tip, I removed the guards & tried a gentle tap on the valves as you describes.... no change!

Despite the buzz I took the amp to rehersal last night so I could give it some beans & also get the studio guy to listen to it. I plugged it in & after the warm up, turned the reverb on & the buzz was almost gone!

You could still hear it very slightly when the reverb is turned on but nothing like as bad as it is when I plug it in at home.

I'm wondering if it's something to do with the way my house is wired or maybe something pluuged in that I haven't found yet (a battery charger or dimmer switch maybe??).....


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Posted: Thu Nov 06, 2008 5:27 pm
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RhodesSeventyThree wrote:
To update,

Hollis Prince, thanks for the tip, I removed the guards & tried a gentle tap on the valves as you describes.... no change!

Despite the buzz I took the amp to rehersal last night so I could give it some beans & also get the studio guy to listen to it. I plugged it in & after the warm up, turned the reverb on & the buzz was almost gone!

You could still hear it very slightly when the reverb is turned on but nothing like as bad as it is when I plug it in at home.

I'm wondering if it's something to do with the way my house is wired or maybe something pluuged in that I haven't found yet (a battery charger or dimmer switch maybe??).....


Hmmm .... Dirty electricity?!?!?

Would you happen to have anything with an electric motor on the same circuit? Like a frig or freezer maybe?

Your post made me think about a noise I had in a some music equipment years ago (can't remember exactly what that equipment was) that turned out to be electrical coming from an old refrigerator on the same line. Switched to another circuit - bingo! noise was gone!

The frig died a little later and has since been replaced and haven't re-checked that outlet yet. (I had forgotten about the noisy outlet)

Good luck.


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Posted: Tue Dec 02, 2008 4:46 pm
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Hi All,

A further update... problem is solved!! Amazingly I found out by chance the cause of the problem is the steel reinforcing in the concrete floor of the building.

When I pick the footswitch up off the floor by about 6 inches the buzzing stops. I guess there must be some weird electrical field being created by the steelwork??

Anyhow, thanks for all the replies, turns out the amp is fine after all!!!


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