Question about Fender Hot Rod Deluxe Guitar Combo Amplifier

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I have a brand new fender deluxe combo amp is the preamp in and out usable for an effects loop

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Yes you could do that. The preamp output is just a BUFFERED output of the signal sent to the power amp. And the power amp input jack is BUFFERED before driving the power amp. These impedances are neither high or low being in the 1K to 3K ohm range.

The jacks for BOTH are mono jacks so noise pickup is possible if long cables are used. The external effects unit should be well grounded and operate off the same receptacle as your Fender for system safety. Use SHORT audio cables to minimize noise.

ALL the signal will pass through the effects unit when used this way... HOWEVER the internal reverb will still be in this path. You can kill this by turning the reverb control to zero on the Fender.

Posted on May 13, 2010

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3 Answers

How To Use The effect Loop?


The effect loop is to use exteernal effect module... It is NOT to use guitar pedals !!!! The signals are line levels, NOT guitar type levels. An example of a device might be an Alesis Quadraverb. You take the effect send jack and run it into the inout of the effects module and the output of the effects module into the effects return jack. Many try to use guitar pedals and massive distortion results because levels are too high for the pedals.

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I have an SWR workingpro 2x10c combo solid state amp. When running a signal into the standard input with all pots set at 12 o clock, the signal sounds very distorted. I have tried a basic troubleshoot,...


You haven't told us what "signal" you ran in... Make sure ALL interconnected equipment is powered from the same receptacle. All audio lines should use balanced interconnects where possible using XLR or TRS cables. Cross connect another amps preamp into the effect loop input to check the power amp portion.

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Fender Hot Rod Deluxe has very little sound, stuck and need help! Turn it on and all of tubes light up. Has a horrible muffled sound with volume at 5. Master volume can be put to any level, and it doesn't...


Just because tubes light up does NOT mean they are good or working... While heaters not lit are an indication of failure, teh reverse is not necessarily true.
Time to troubleshoot this... Plug a set of headphones into teh preamp out. See if audio there is clean... it will be low level using headphones and ONLY from one side as the output is mono and your headphones are stereo usually... If audio is clean here and not muffled, then problem is in power amp section else in the early stages of the unit.
Report back the results of this test...

Nov 09, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

How do i connect the boss gt 10 to a fender blues deluxe amp and bypass the amps preamp


You can plug the output of the gt10 into the "power amp in" jack of the Fender. This bypasses the preamps in the Fender but uses a buffer amps in the Fender to drive the power amp. Please note that the reverb is STILL in the circuit when you do this. You can turn the reverb to zero if you wish to disable it.

Jun 09, 2010 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

I have Fender Hot Rod Deluxe and Blues Deluxe amps.After the amps are in use for 20-30 minutes, volume just flat out fades to almost nothing. I have had it checked out and technician could not reproduce...


I want you to do a test. while using the amp plug a pair of headphones into the preamp out... note you will only hear stuff on one side if they are stereo phones and the sound may be fairly weak... while the unit is operating correctely then unplug phones and use it. When it fades out plug in phones compare the level when it was OK... If the preamp output fades lower as well, then we know problem is in the preamp section...

We can do a lot of troubleshooting without opening the amp.

I see nothing in the scheamtics that should be an issue causing this...

Since it didn't fail for the tech, think "what was different?". Are you connecting something else? Foot pedal? Temperature? :Loudness of playing?

Now what else is in common to these two units... AHA! The guitar...

If your guitar has a battery in it, the 20 to 30 minutes fading would correspond to a battery failing and then recovering after you unplug the guitar for a while.

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

3 Answers

Fender hot rod deluxe tube rattle.


Fender hot rod´s have an common problem on the plate resistors of the preamp and phase inverter tubes.

Check if the 100K and 82K resistors on the tube socket board are not brown. Those resistors usually need to be changed to bigger ones 1/2W.

this guy made a good document about this fix:

http://home.comcast.net/~fredholz/Justin-Holton/Fixing%20Loud%20and%20Intermittent%20Crackle%20or%20Static.pdf

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

1 Answer

No clean tone


Look for bad electrolytic caps in the bypass caps for the power to the preamp stages.

Jun 02, 2009 | Fender Hot Rod Deluxe Guitar Combo...

1 Answer

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

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

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