Question about Fender Hot Rod Deluxe Guitar Combo Amplifier

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My 94 blues deluxe switches channels by itself .happens occasionally.it will switch to the overdrive channel, then a few seconds later switch back to the clean channel.

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IF YOU ARE USING the footswitch, then likely problem is with cable and or the pug and jack.

IF YOU ARE NOT using the footswitch the contact switch on the jack for the footswitch is PROBABLY intermitent contact. These jacks are POOR quality in the music equipment. If this is the case in yours, open the unit and tighten the spring contact.

Posted on May 08, 2010

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I have a Marshall mg100hdfx Head & Cab - The clean channel is on but when i hit the footswitch it is not changing to overdrive channel - please help


Sounds like either your "front-panel" switches are not set for channel switching or the footswitch's mechanical "Channel" switch is defective. According to the OM the "Channel Select Switch" on the front becomes inactive with the footswitch plugged in.

If disconnecting the footswitch causes this front-panel switch to operate properly then it has to be your mechanical switch in the footswitch. Repair of these footswitches are pretty simple provided you find a replacement and have soldering abilities.

Oct 25, 2012 | Music

1 Answer

How do I fix a blown op amp on fender hot rod deville 2x12?


Unless the person that analyzed this problem used an oscilloscope and did detailed troubleshooting, I would NOT jump to the conclusion that aan op amp was blown BASED upon my looking at the schematic of the unit. There are MANY components involved with the overdrive channel, including relays and other transistors and components. The most probable caause would be that 1/2 of the V2 vacuum tube is burnt out. Test by swapping V1 with V2. If NOTHING works, then replace the tube that is NOW in V1 as the second section of it has a burnt out heater. Also a bad potentiometer for the OD channel would be a suspect. A VERY common problem is broken solder at pot terminals. Try plugging a set of headphones into the preamp output. See if you can hear sounds in bothe OD and clean channels. Note you will only hear sound in the LEFT headphone as the preamp out is MONO. MOST of the three op amp chips would NOT kill the OD signal if they were bad.

Sep 04, 2012 | 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...

1 Answer

My Peavey vk100 head is running through a Carvin Legacy 2x12 cab. On the clean channel there is an inconsistent popping sound. It will happen loudly for a few seconds, and then not at all for a while, and...


You may simply be overdriving the clean channel and causing it to "flat top" . See if it occurs when you back the gain down a bit. New tubes PROBABLY will not help and be a waste of money. You may be unconciously playing harder during the popping episodes. You cannot hear level variations smaller than about 3 Db BUT the electronics will sense much smaller variations. You could gently tap the tubes with a lead pencil to listen for any pops... NOTE: tubes can be slightly microphonic so some sound from tapping is normal.


Yes, a cable can be noisy and not show itself when using intentio0nal distoprtion... try another to verify it is not the problem.

Jan 02, 2011 | Peavey Valveking Vk100 Guitar Head

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

I have a crate fxt 120. I 'll be playing in the #2 overdrive channel and it will automatically fail and go to a clean sound. Although it is not entirely clean. It sounds like 2 sounds combined. A loud...


A possible problem MIGHT be marginal switch contacts on the external foot controller cable. If you are not using the foot pedal, these contacts must maintain contact to keep the same channel selected.

Sep 15, 2010 | Crate Music

1 Answer

Everytime I play on my Fender Frontman 212R the amp switches betweeen the overdrive and clean channels. I can't even switch between the channels on my own. It does it itself. I need help fixing this...


You don't say if you are using a footswitch or not... If you are, the switch, cables and connectors are suspect.

If you are NOT using the controller, the switch contacts on the footswitch jack in the 212 are suspect as being intermittent contacts.

If the contact is not making, the OD switch on the unit will NOT work either.

These jacks, and their contacts are JUNK and often cause problems.

Open the unit and increse the tension of the contact springs.

Jul 27, 2010 | Fender Frontman 212R 100W 2x12 Guitar...

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