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Sifflement de la reverb de l'ampli fender supersonic tween

Sifflement a partir du volume 5 de la reverb

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: my 1967 fender super reverb amp starts popping and

IF the blue is on the GLASS envelope, that is just phosphouresence in the glass and not a problem. The harder you drive the tube, the brighter this will get. The electron beam heading toward the plat of the tube leaks past the plate and hits the glass. ot to worry if the blue is on the glass.

IF the glow is magenta/purple in between the internal electrodes, the tubes have gotten gassy and need replacing.

From your desciption, I would suspect a capacitor is going bad someplace in the unit OR the vibration has loosened a connection someplace. Input jacks are VERY common problem for intermittent noises like this. The jacks get destroyed because the musicians FAIL to restrain the intrument cables and yank them sideways. Loop the cable through the handle to help avoid the problem.

Posted on Feb 01, 2010

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SOURCE: The red and white connections going to the Reverb

If you touch each wire, the one that receives the output of the tank should hum. Quick and dirty test.

Posted on Mar 13, 2010

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1 Answer

I have a '93 Fender Blues deluxe tweed and don't seem to have any reverb, am I missing something?


Check the connection to the reverb tank (rectangular box usually sitting on the bottom of the amp). There are a pair wires that connect it to the amp. If wires are connected, and the reverb is not working, you may need to replace the reverb tank.

Oct 16, 2016 | Fender Music

1 Answer

No reverb on my fender ps 160 Vocal amplifier


Here is a link to the schematic drawing
http://www.prowessamplifiers.com/schematics/fender/ps160.pdf

items to check are
1-the footswitch and plug
2-the reverb unit ,usually found at the bottom of the box
3-the reverb unit is plugged in to the amp
4-V6 a 7025 valve
5- the reverb switch is in the on position

Hope this helps

Len

Oct 14, 2014 | Music

1 Answer

My Fender Supersonic 60w head is getting zero sound thru my speaker. Not even the usual ground level hiss. Checked/replaced all tubes. The fuses are good. Cables are good.


Next is to check if the speaker is open circuit. Check with ohmeter or plug in a radio/hifi at low volume to the speaker.

If speaker is OK, next suspect is power supply. This will be over 400 volts so not safe for the unwary. I assume filaments are lighting up.

May 01, 2011 | Fender SuperSonic 60 60W Tube Guitar Amp...

1 Answer

I've told my Frontman 65r has a real reverb tank (accutronics). But it's almost imperceptible, even with the reverb knob at 10. Is that normal? Also, mid scoop for the drive channel and treble/bass for the...


The reverb should be quite strong. I would first look at the reverb volume pot R42 which is a 50K pot. I would also check the voltages on the test points near U4 (TLO-72 op amp tp13 and tp14) which amplifies the signal coming out of the box. It is possible the box has low power levels as well.
The problem is going to be around that section of the board if it isn't a dirty or dead(ish) pot.


The reverb should be noticeable enough to be annoying ;-]

Mar 18, 2011 | Fender Frontman 65R 65W 1x12 Guitar Combo...

2 Answers

Amp is little used and now the reverb is not working. It is never moved from the room where I play.


There are only TWO op-amps and the tank involved with the reverb. Both of those are in one IC chip labeled "U2". It is a TL072.

Pin 1 of that chip is the output to the tank and pin 7 is the inout of the reverb control pot that then goes into the power amp.

They resistively mix the delayed reverb signal with the straight signal at the input of the power amp.

I assume you have turned up the reverb control which is just a volume control for the signal going through the tank.

There are so few parts involved with this that a failure is really rare.

May 13, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

Hi, I've owned a Fender Hot Rod Deluxe since '01. Around '06 I started having problems like crackling sounds when on but guitars volume was all the way down. Loss of volume here and there. While amp was on...


In YOUR amp, take a pencil and tap teh sides of the tubes GENTLY, listening for any crackling... note SOME microphonics is normal in the preamp stages.

Since retubing it fixed it once, it is likely either a tube was bad OR a pin of a tube wasn't quite making so replacing the tubes cleaned it and made it work. Tubes DO go bad, especially when they are vibrated like in these amps... BUT don't just replace the lot, try to find which is at fault..

On your friends unit, LIKELY an electrolytic bypass capacitor for one of the reverb preamp stages has dried out and needs replacing.

Apr 23, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

Reverb problem


I highly doubt the reverb pan is dead, there are TL072 opamps on the input and output of the Reverb pan. Check those out. You can get the schematic from fenders website here. U6A and U6B are what you are looking for.

http://www.fender.com/support/amp_schematics/pdfs/Roc_Pro_1000_Schematic_B12.pdf

Dec 26, 2009 | Music

1 Answer

Hot Rod Deville, reverb squeal...


Here is an article that might help:http://www.guitarplayer.com/article/reverb-troubleshooting/jun-09/97165 Here is the schematic:http://www.fender.com/support/amp_schematics/pdfs/Hot_Rod_DeVille_Schematic.pdf Check to see if someone hasn't reversed the input and output cables at the reverb tank. Then troubleshoot the reverb section .

Aug 28, 2009 | Fender Hot Rod Deluxe Guitar Combo...

2 Answers

I have a Fender Hot Rod Deluxe. It has very few


First try turning the volume control down before turning switch to operate.

IF this seems to fix it, IF the unit has a tank reverb, the vibration of the reverb springs MAY be causing the problem. The solution then is to reduce the volume before applying power WHICH is a good idea anyway... from an electrical engineer.

Jul 24, 2009 | Fender Hot Rod Deluxe Guitar Combo...

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