Question about Fender Hot Rod Deluxe Guitar Combo Amplifier

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M fender hot rod deluxe makes popping sound when switching channel from drive to clean channel

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 11 Answers

SOURCE: Fender Hot Rod Deluxe making popping noise

Ah yes, the Fender Hot Rod Deluxe. I have seen more of these in my shop than any other amplifier!! I have even sent recomendations for design changes to Fender about this amplifier.
Sadly, your amp tech may be correct: while the amp is within working specs, you can still have an issue with a bad socket. The cheapest thing to try is to replace the preamp tube(s) you think may be causing the problem. If the problem persists, it may need to be serviced on this issue (by a different 'certified Fender tech'). In defense of the last tech you had work on this amp, these amplifiers have a brittle design and do not gig or travel well (there are a minority of these amps made that do perform). Fender tried to do too much for the price on this model: best advice is to fix it, sell it and get your tone with a more stable model made by Fender (like the new vintage re-issues). Fender, like Marshall, has for years been having problems when they get too far from thier 'working reciepe' of what made them great companies.
You likely have a socket that needs re-tensioned, or a preamp tube not behaving. If it is not these, then a tech had to dive in the house of cards that is this circuit. Sorry for the bad news on this, but it is the truth. I only take on Hot Rods that 'appear' to be fixable. I am a development engineer, build amps from scratch and fix them for the local music shops, and my success rate is a dismal 60%-ish percent on these...
Thanks,-mike

Posted on Mar 30, 2009

  • 5603 Answers

SOURCE: 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.

Posted on Jul 26, 2009

PolyrhythmFX
  • 109 Answers

SOURCE: Fender Hor Rod deville footswitch

If the footswitch is not switching correctly, open it up and check for any shorts or a defective switch. Sounds like it's a problem with the switch.

Posted on Aug 14, 2009

  • 5603 Answers

SOURCE: Fender Hot Rod Deluxe Footswitch

Main thing to verify is that the particular footswitch and cable you have is specifically for that amp. If it is not the right one, that is your problem as there is very little compatibility among footswitches.
Looking at the schematic, plugging in JUST the cable shifts operation as you observed. This uses a crazy circuit in which AC is applied on the cable and the footswitch has a diode each direction that causes the amp to shift between the states. when you plug a bare cable in, it disconnects the internal diodes and switches for control at the amp, hence the signals float.
You should investigate the footswitch to make sure it is the right type with the diodes resistors and caps that is for the Fender Deluxe.

You can find the schematic for the amp here:

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

Look at the circuitry of the switches on the schematic at C8. Your pedal should have similar circuitry. Assuming your cable is good, the problem would be in the pedal itself.

Posted on Jan 02, 2010

  • 5603 Answers

SOURCE: Popping sound when amp is on. A steady pop,pop,pop

You don't say WHICH lights dim with the popping. IF it is your lights in the house, IMMEDIATELY get an electrician to check your wiring as there is a loose connection or failure someplace in the sytem that would be a fire hazard.

IF the lights you are talking about are those on the amp, there is a power supply failure in the amp which is LIKELY a bad filter capacitor. Take in for repair or learn how to work on the eloectronics safely and do the repair yourself. The part is likely under $5,

Posted on Feb 12, 2010

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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...

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

When i use the over drive it will switch back and forth between the clean channel. But when im on the clean channel it is fine.


Sounds like the overdrive switch needs cleaning (with switchcleaner) or replacing. Try touching the switch gently when in overdrive position - if that brings on the jump-to-clean fault, then you confirm the switch is the problem.

Dec 17, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

The clean channel cuts in and out. The drive channel works just fine though. The clean channel also makes a rattling noise when it is working then it cuts out. Whats up with this thing?


This is likely a bad jack for the foot pedal, or a problem with the pedal and cable. The jacks are junk and even with the pedal unplugged the switch contacts on this jack will vibrate and cause your problem.

Jul 19, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

Fender Hot Rod Deluxe Footswitch


Main thing to verify is that the particular footswitch and cable you have is specifically for that amp. If it is not the right one, that is your problem as there is very little compatibility among footswitches.
Looking at the schematic, plugging in JUST the cable shifts operation as you observed. This uses a crazy circuit in which AC is applied on the cable and the footswitch has a diode each direction that causes the amp to shift between the states. when you plug a bare cable in, it disconnects the internal diodes and switches for control at the amp, hence the signals float.
You should investigate the footswitch to make sure it is the right type with the diodes resistors and caps that is for the Fender Deluxe.

You can find the schematic for the amp here:

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

Look at the circuitry of the switches on the schematic at C8. Your pedal should have similar circuitry. Assuming your cable is good, the problem would be in the pedal itself.

Jan 01, 2010 | Fender Hot Rod Deluxe Guitar Combo...

2 Answers

Fender Deluxe. The volume knob has no effect whatsoever. Volume only changes with the drive knob.


Your amp has two channels - "normal" and "drive." When you are on the normal channel, the "volume" knob controls your gain. In the "drive" channel, the drive knob controls your gain. In both channels, the "master" knob limits how loud the amp will get.

Most likely, you are on the drive channel, so the volume knob will have no effect. Try pushing the "channel select" switch. You should notice the channel indicator lamp (next to the drive knob) turn off. When it is off, you are in the normal mode. Yellow = drive, and red = "more drive."

Experiment with different settings to get a variety of tones.

To get the most out of this amp, try reading the manual, available online here:
http://www.fender.com/support/manuals/pdfs/manuals_elec/guitarpdf/Hot_Rod_Deluxe.pdf

Have fun - it's a great amp.

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

2 Answers

Fender Hor Rod deville footswitch


If the footswitch is not switching correctly, open it up and check for any shorts or a defective switch. Sounds like it's a problem with the switch.

Aug 14, 2009 | Fender Hot Rod Deluxe Guitar Combo...

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