Question about Fender Hot Rod Deluxe Guitar Combo Amplifier

Open Question

My fender hotrod deluxe amp hums only on clean channel with nothing plugged in

It will still play clean but it hums with the volume up or down even with nothing plugged in to it.

Posted by on

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
  • 5603 Answers

SOURCE: loud humm when the drive channel is on

I suspect the power supply has an issue. Most likely bad filter capacitors. This could cause "motorboating" where power is drawn and supply voltage collapses and then recovers repeatedly.

Time for the repair shop. The parts cost should be nominal... labor... well...

Posted on Mar 16, 2010

Ad
  • 5603 Answers

SOURCE: My fender hotrod deluxe still produces some sound

There are FOUR controls that affect the volume of signals going through plus the tone controlling ones.
and your
You used the word "volume". Based on the schematic, and assuming you are talking about the control labeled "Volume" and not reverb, master or drive, I can give some hints.

OFTEN the resistance element in pots MAY have a bit of overtravel which can act like your unit, but USUALLY not as far upscale as yours appears..

If the control you are refering to is not the "Volume" but one of the others, then there are other things to look at.

The action you describe would be one of probablly an inverse signal leaking through and when you go up to 1.5 you are actually cancelling the leakage.

I SUSPECT you may have a cracked circuit board in the vicinity of the input jacks that is leaking the inverse phase of the input past the input triode tube stage.

Board cracks OFTEN occur near input jacks because people trip over cords... (save yourself by running cord through a handle before plugging in the plug)

This should be easy to find. Connect an audio generator to the input and use a scope to find the problem. Without a scope, use a capacitor to "ground out" suspected signal paths.

On the schematic they show a resistor (10 ohms) from ground near the input to the pot bracket. I have personally SEEN capacitive coupling to pot brackets feeding into the amps from this source sending in stray signals.

If this is connected to other equipment, a ground loop could cause problem, so test with nothing but the guitar connected.

Posted on Apr 30, 2010

  • 5603 Answers

SOURCE: i have a delux 90 fender amp solid state and it

This could be any of several problems including a failure in the power supply filtering, a tube that has shorted, or a broken ground someplace. Take unit in for repair.

Posted on Dec 07, 2010

  • 5603 Answers

SOURCE: my fender hot rod deluxe

Realize that the number on the volume control is only relative... it means nothing regarding what the amp can produce. With a high level output guitar you can easily drive the amp into distortion at very low volume control level settings... what counts is the actual output sound volume and specifically the voltage output going to the speaker. Once the amp reaches saturation, any further input just pushes it into distortion or "flat topping".
An oscilloscope on the output will quickly show when amp starts to flat top.

Posted on Jan 17, 2011

  • 2 Answers

SOURCE: The clean channel on my

Sounds like you need to replace a tube.

Posted on Mar 27, 2011

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

My 412Hot Rod Deville has terrible humming/white noise when distortion channel is on


It doesn't happen often but I suspect that the high gain input jack is defective. With nothing plugged into either input jack part of the signal is grounded and there should not be any noise. It might be that plus a noisy preamp tube. Try swapping the first two tubes to see if there is less noise. Carefully bang your fist or use an insulated tool's handle to hear if the noise changes. It might be an intermittent solder connection as well.

Jul 15, 2017 | Fender Hot Rod Deluxe Guitar Combo...

2 Answers

My Fender Hot Rod deluxe makes a popping noise when switching back to the clean channel.


This is because your clean channel only runs through the pre-amp section, requiring an increased volume level to match that of the volume of the drive section which is overdriven by the pre-amp circuit. my suggestion is to use lower volume level on the clean channel of the amp. To get any volume boost you may need to match the two channels you could use a signal/volume booster or overdrive pedal between your guitar and amp input, switching it off and back on when you switch back and forth between channels.

Jul 15, 2012 | Fender Hot Rod Deluxe Guitar Combo...

3 Answers

Hello, I own a hotrod deluxe. I take great care for it and never move it. Normally on the clean channel, the volume is regulated by the volume and the master. Today the amp sounded only half as loud as...


Do you turn on standby every time and wait for the tubes to heat up first? If you don't, it can severely damage the tubes.
But a common cause of this could be just old tubes. Like any other piece of technology, tubes get old. If you like to play your amp LOUD then they wear out a lot quicker. You have to replace tubes every now and then. Because I'm not there to check out your amp, I can't give you an exact answer but it sounds like that's the problem. This isn't always a bad thing. You can make the sound of your amp exponentially better with nicer, new tubes. Your amp has 12AX7 tubes. Very common tubes to use actually. I'm not sure what kind of music you play, I'm assuming mostly rock and blues. But here is a list of tubes and reviews on them.
http://thetubestore.com/12ax7review.html
This is how to replace a tube:
http://www.ehow.com/video_4438285_change-pre_amp-tubes-guitar-amps.html
Upkeep on a tube amp:
http://www.ehow.com/video_4438295_replace-tubes-guitar-amp.html
A note he doesn't make in the video is to dust out your amp. I use the compressed dust spray for the inside of computers.
So overall, stop turning up your amp to 11, make sure it's well ventilated and dust it out from time to time. Hope this helped.

Jun 18, 2011 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

The amp plays fine for about 15 to 20 minutes, then an extremely loud, over powering hum/buzz takes over, and then the amp has to be turned off, but the problem persists. I've tried several guitars,...


You say the "tubes are fine" I take it that you have either replaced them with new or used a very sophisticated tester on them. A heater-cathode short might cause the symptom. There are a bunch of tests I would want you to run alnd get back to me with the results.

Heat up the amp but DO NOT play anything into it for the usual failure time or more and they start to play i... did hum occur WITHOUT playing? With all volume controls down does the hum occur?

The right tools is an oscilloscpe to fing out if the filter caps are good. These are C31, C33, C35, C36.

With hum present in failed stater, plug in a grounded plug into the power amp in jack... if hum is stiil there, check the +/- 16 volts regulating Zener for ripple. get schematic here:

http://elektrotanya.com/fender_hot-rod-deluxe_sch.pdf/download.html

Jan 29, 2011 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

My fender hot rod deluxe is distorting in clean channel when I push the volume past 2


Realize that the number on the volume control is only relative... it means nothing regarding what the amp can produce. With a high level output guitar you can easily drive the amp into distortion at very low volume control level settings... what counts is the actual output sound volume and specifically the voltage output going to the speaker. Once the amp reaches saturation, any further input just pushes it into distortion or "flat topping".
An oscilloscope on the output will quickly show when amp starts to flat top.

Jan 17, 2011 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

My fender hotrod deluxe still produces some sound with the volume at 0, no sound at about 1.5, then regular volume control on up. I know the clean channel sounded better before this problem started. I've...


There are FOUR controls that affect the volume of signals going through plus the tone controlling ones.
and your
You used the word "volume". Based on the schematic, and assuming you are talking about the control labeled "Volume" and not reverb, master or drive, I can give some hints.

OFTEN the resistance element in pots MAY have a bit of overtravel which can act like your unit, but USUALLY not as far upscale as yours appears..

If the control you are refering to is not the "Volume" but one of the others, then there are other things to look at.

The action you describe would be one of probablly an inverse signal leaking through and when you go up to 1.5 you are actually cancelling the leakage.

I SUSPECT you may have a cracked circuit board in the vicinity of the input jacks that is leaking the inverse phase of the input past the input triode tube stage.

Board cracks OFTEN occur near input jacks because people trip over cords... (save yourself by running cord through a handle before plugging in the plug)

This should be easy to find. Connect an audio generator to the input and use a scope to find the problem. Without a scope, use a capacitor to "ground out" suspected signal paths.

On the schematic they show a resistor (10 ohms) from ground near the input to the pot bracket. I have personally SEEN capacitive coupling to pot brackets feeding into the amps from this source sending in stray signals.

If this is connected to other equipment, a ground loop could cause problem, so test with nothing but the guitar connected.

Apr 30, 2010 | Fender Hot Rod Deluxe Guitar Combo...

2 Answers

Loud humm when the drive channel is on


I suspect the power supply has an issue. Most likely bad filter capacitors. This could cause "motorboating" where power is drawn and supply voltage collapses and then recovers repeatedly.

Time for the repair shop. The parts cost should be nominal... labor... well...

Mar 15, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

When Im playing the clean channel at home no hum but on stage large hum .there are other amps onstage is this picking up something from them?


It could be a number of things. If your amp is plugged into the same circuit as the lighting system it is the usual source of hum. Whatever you do, do not remove the ground prong from your plug on your power cord. Check at a music store and ask for a hum isolator. They make really good ones now that are not that expensive.

Nov 25, 2009 | Fender Hot Rod Deluxe Guitar Combo...

Not finding what you are looking for?
Fender Hot Rod Deluxe Guitar Combo Amplifier  Logo

Related Topics:

84 people viewed this question

Ask a Question

Usually answered in minutes!

Top Fender Music Experts

Michial Gueffroy

Level 3 Expert

1138 Answers

dave nyman

Level 1 Expert

17 Answers

Matthew Spark
Matthew Spark

Level 3 Expert

1066 Answers

Are you a Fender Music Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...