Question about Fender Hot Rod Deluxe Guitar Combo Amplifier

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Fender 100w twin amp no sound

I have a 100w fender twin amp ,it turns on but no sound . tubes look fine , two lights in the back of the amp go on (v9 & v11 trouble) & (v10 &v12 trouble) . Before the volume on the amp would drop on & off . ?????

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  • aaronphipps Apr 24, 2009

    My amp was doing the same thing, the sound would drop on and off. then the sound wouldnt come through, now it doesnt even turn on. not sure what the problem is.

  • jpvan2010 Apr 27, 2017

    Many newer Fender (reissue) amps have poor solder joints. First, be sure your "Standby" switch is good. Then, have a skilled technician resolder every connection they can get to, especially the ones in the power supply.

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Here is a test you can do at home for the sound. Test out the speaker. To do this you will need two alligator clips with wire about ft. long. Remove the speaker wire clips under the speaker magnet and attach the alligator clips . Take a C size battery and touch both ends of the battery. You should here a scratching sound . If you do you know your speaker is OK. Then you have a problem that needs a Technician. A good music shop should be able to give you a idea of the repair cost. Don't go to a big music change, find a small full service shop that deals with Fender. I don't think this will cost a lot. Fenders play for years, Its truly worth the bench fee. Good luck DFD , please rate me thanks

Posted on Apr 19, 2009

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Posted on Jan 02, 2017

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1 Answer

Very loud cracking when turning on standby switch


Do some quick tests to locate the fault area....
i) With all gain controls at minimum & amp warmed up, turn on the standby switch & observe the large output valves for sparking or flashing (could be breakdown in one of them).
ii) Remove V6 (12AT7). Is the crackling still there? If so, the fault is in the final output stage (four 6L6GT's).
iii) To test the output stage, keep V6 removed & remove V7 & V9. If the fault clears then one of those 6L6's is likely to be faulty.
iv) If the fault persists, reinsert V7,V9 & remove V8,V10. If fault clears, then V8 or V10 is the culprit.
v) If the fault still doesn't clear, then desolder coupling capacitors C22,C23 - which may be leaky.

I suspect the fault is the output stage valves, in which case it's best to buy a matched set of 4 & re-bias.

No valve tester is needed here!

Dec 10, 2013 | Fender 65 Twin Reverb 85W 2x12 Tube Guitar...

1 Answer

The reverb channel on my fender twin feeds back


Not sure of how it is feeding back. Two possibilities... the reverb tank in the cabinet is no longer shock mounted. The other is your guitar can "hear" the speaker... make sure you are away from the amp. With the reverb on, the feedback stability is less than with it off so make sure your guitar is away from the amp. Acoustic guitars are more sensitive to this than solid body ones.

May 10, 2011 | Fender 65 Twin Reverb 85W 2x12 Tube Guitar...

1 Answer

Twin tube amp. power comes on, no sound. replaced tubes, still no sound


Do you have the speakers connected properly?? If so, maybe speaker wiring needs checked.

Feb 19, 2011 | Fender 65 Twin Reverb 85W 2x12 Tube Guitar...

2 Answers

I have a Fender Frontman 212r amp. The problem seems to be when I put the volume upto past 4/10 [40%] The amp gives out an awful crackling sound and power light etc flickers on and off. I have had the map...


When i turn on my 212R it turns on in drive channel. if footswith is plugged in, then it turns on in the clean channel, but after switching in drive it is impossible to switch it back in clean channel. What could be wrong? Swith position doesnt change anything and it seems like switch is OK.

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

1 Answer

Marshall DSL 401 runs fine for about 10 minutes from cold then starts to crackle and sound disappears The amp is fairly new with not a lot of use


if this a tube amp then your tubes might be going bad. but if it is a solid state amp then im not to sure whats going on.

Mar 01, 2010 | Marshall Amplification Marshall MG250DFX...

1 Answer

FENDER CYBER TWIN AMP SOUNDS GREAT WORKS GREAT BUT WHEN YOU CRANK THE VOLUME A LITTLE LOUDER THAN NORMAL THE AMP GET STATIC OR DISTORTS OR POPS AND CRACKS. COULD THE TUBES DO THIS?


First make sure you have the TRIM knob positioned correctly. When playing loud the Red Led should just blink a bit so you know you're not overloading the preamp and Digital sections. The Twin Reverb Patch is a clean place to start so select that first. On this amp it's a good idea to set the MASTER to 5 and use the VOLUME control at as low a setting as you can. The GAIN control should be set under 4. You better sound crystal clear on this setting. Try turning up the volume to see how loud you can get without breaking up. It's a guitar amp so there will be some grainy distortion but it should be very light. I bet you get through this test without much trouble. After that you need to be very careful about what settings you're using since many of the presets may not mesh with your guitar pickups. You should concentrate on tweaking one highgain setting and learn about how the controls interact. The amp is so much more complicated than a 10 knob standard guitar amp. Most people need to put in some time to get a handle on it.

As far as the tubes go, typically they can get microphonic which was a problem with versions 1.1 and 1.0 of this amp so check that. Fender had a Cyber twin upgrade kit way back to fix this but if you have version 1.2 or 1.3 that's not it. Problems with this amp are typically caused by control setting more often than an electronic problem but this reponse should get you started figuring it out.
MYREL

Jul 13, 2009 | Music

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