Question about Audio & Video Receivers

1 Answer

Fender deluxe reverb amp keeps blowing tubes - Audio & Video Receivers

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 3 Answers

If it's blowing fuses. It probably has a bad output tube.
If it's blowing tubes. It may have a cracked tube socket.  Also may need to be biased by a tech.

Posted on Aug 21, 2008

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Wot are the send,return,post out socket for on a prosound 4100 amp


These are all related to using external effects processors, like if you wanted to use a separate reverb unit.
"Send" is the output that gives the un-processed signal to the external device, and "return" receives the signal from the external device.
"Post Out" is an output from the amp that occurs AFTER the send/return jacks on the bus, i.e., if you are using an external reverb unit, the "Post Out" signal will include the reverb fx. If you have a "Pre Out" jack, it's signal will NOT include the reverb fx.

May 08, 2011 | Audio & Video Receivers

1 Answer

I got this old Reverb Amp from cleaning out a house for a real estate agent. I was wondering its worth & how to go about getting it to someone who would like to have it. Thank You Its a Pioneer SR-202...


It's an old 'spring-type' reverb.

http://en.wikipedia.org/wiki/Reverberation#Spring_reverberators

I have one from the mid-70's, long unused. Digital reverb is more predictable and not susceptible to rom vibrations or jarring. There are those who would still want one.

You might put it out on eBay. They don't get much for them.

This auction expires in 2 days. The bidding is $20.50 right now. You might watch it to see what the unit eventually goes for.

http://cgi.ebay.com/Vintage-Pioneer-Reverb-Unit-SR-202w-/260777273468?pt=Vintage_Electronics_R2&hash=item3cb789687c

May 05, 2011 | Audio & Video Receivers

1 Answer

HELLO, just bought a fender HRD 410 AMP AND DISCOVERED THAT THE REVERB DOES NOT FUNCTION ! WHAT'S UP ?


Hi Fenderman.

Damn, you gotta hate that. First thing, do you have any recourse with the outfit you just bought the amp from? I guess not if you are asking in here. There is not a whole lot that stops the reverb in these amps. First things to check would be that the connections to the rev-eb tank are ok, and the cables to them not damages, and the terminations to the RCA plugs are good. Check that the reverb tank is connected thew right way round also. If everything so far checks out, and yourself, or an electronics savvy mate then time to download the circuit from here

Then from there, pull the chassis out of the box, and check/look for dry/cracked solder joints about the reverb Pot, I would check the voltages about U2, TL072, and even just change it out if you are unsure. The reverb tank could also be down, hard to check this easily without swapping it out, if you have(maybe time for the repair shop here) a CRO, then you can sniff off the audio going in and out of the tank to be sure that is it functioning.

Anyway, that is a rundown on what may be wrong with the HRD. If you have any questions, more that happy to answer them and continue to help you out. a FixYa rating is a great reward for my time to talk this through with you. Cheers!

regards
robotek

Nov 10, 2008 | Audio & Video Receivers

1 Answer

My laney aor series amp has completely stoped working, the valves are still glowing but no sound is coming out


Hi.

Have you checked the HT fuse. the amp has 2 power supplies, one for the tube heaters, and another for the actual operation of the amp. Check that fuse, and replace with exactly the same type if blown. If it keeps blowing fuses, then you may well need to change your output tubes. They don't last forever, and you will get about 6 months out of them in normal gigging/rehearsal use, longer if you don't use the rig at high levels. Be sure also to use a proper speaker lead, not just an instrument patch lead, poor connectivity from anything that is not heavy duty can cause your amp to blow fuses, AND pop valves. I am happy to talk more to you about it, I have had a long love affair with valve amplifiers, both building and repairing them.

regards
robotek

Nov 08, 2008 | Audio & Video Receivers

1 Answer

The footswitch for bugera 6262 valve amp seems to have a logic problem. The clean channel leaves 'lead and reverb' leds lit on footswitch, pressing 'lead' lights the crunch channel on the amp... and reverb...


Hi ! Check and make shure that the cord conections between the pc board on the backplate of the amp to the logic board are firmly pushed in there slots.
Good luck , Stefan from Sweden

Aug 18, 2008 | Audio & Video Receivers

3 Answers

1974 FENDER TWIN REVERB HAS NRE TUBES NEW FILTER CAPS AND WAS REPAIRED BY RETIRED AUTHORIZED FENDER TECH. PROBLEM AMP HAS VETY LOW OUTPUT UNTIL YOU CRANK IT TO 8-10 THEN IT SOUNDS HORRIBLE DISTORTED AND...


This sounds like a power supply problem. The high voltage for the tubes is not right. Either you are missing an amplification stage because this or one of the coupling caps is faulty. I'd have to see the unit itself to give you any more details.

Dan

Jul 22, 2008 | Audio & Video Receivers

1 Answer

I have a Fender tube amp The Twinn. 4 6l6 2 12at7 and 4 12ax7. Mu reverb is dead and I here some strange oscillation. I suspect the 12at7 in reverb and one 12ax7 Both microphonic and very dem fil. ...


Hi ohmytom

Yes, they could be causing the problem.The filaments are a little hard to see sometimes, you will always get a little microphonic activity about preamp tubes. It may also have failing capacitors depending on how old it is. Is it a "Twin Reverb". Let me know the exact model and we can be a little more specific of the problem and solution. Cheers


regards
robotek

Jul 14, 2008 | Audio & Video Receivers

1 Answer

Have a Fender Twin 57 custom shop reissue, 18 months old, keeps blowing the mains fuse after approx 30/40 into a gig. Amp not overdriven, no external FX used


Hi debdenplace

Blowing fuses at gigs is not a very nice habit. I suspect that you need to retube the output stage. It is the most common cause of fuse blowing. Even though not being overdriven, the life you get out of output tubes relates to volume and time. The higher the levels, the more often they may need to be replaced. Go for the Groove Tube replacements if you can afford them GT6L6GE , but I use a gain matched pair of Sovtek Russian made Electro Harmonix ELH6L6EH in this type of amp. They cost about half as much, are designed with Fender style output stages in mind and do a great job.
I am more than happy to answer any other questions you may have about it, please get back to me here, or use the ASK function to go straight to me :) If you are still unsure, have problems, or we need to look at the situation more deeply, then before you give a rating for this advice, hit the ASK button Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards robotek

Jul 05, 2008 | Audio & Video Receivers

1 Answer

Hi i use a peavey 6505 Amp head and when i run a seymour duncan pickup booster through the effects loop it blows the amp (possibly the pre-amp fuses) i want to get a volume boost in a distorted setting...


Hi bmwz43

Odd that you keep blowing the head... and with 5 12axl preamp tubes even more surprised that you cannot get enough gain... :) Get the correct pedal for the 6505 and change yo levels that way. Hard to beat classic tube amp for tone:)

Check the the amp has the correct impedance setting for the quaddy you are using.

One more thing, what sort of cable do you have connecting the amp to the speaker box. If you use a cheapo guitar jumper lead arrangement, expect that to give you trouble AND **** tone. The 6505 has 120watts of cranked up tube output. Tube output stages need a solid at least 18 gauge cable and quality connector jacks, like Switchcraft. They can blow fuses if you don't use a decent speaker connector lead.

Get back to me here if it does it again, and check to see exactly which fuse you are replacing. It can help sort out the problem.

regards
Graeme

Apr 27, 2008 | Audio & Video Receivers

2 Answers

Sansui g5500 receiver keeps blowing fuse 5amp.


I cannot seem to find any useful information for so I'll just say this from personal experiences repairing amps/receivers. Unfortuneatley there is no good news for you.

The only reason a fuse would keep blowing is if a upstream component is bad or there is a short to ground on the circuit card. If g5500 is a tube set you may get lucky as tubes either open circuit or short circuit. My suggestion, if tube, would be to power up the unit after taking the cover off and notice if there are any tubes that light up at all, will be a quick look and a number of fuses.

BUT FIRST. BEFORE YOU TAKE THE COVER OFF ANY UNIT, UNPLUG FROM WALL AND LET IT SIT FOR 2 HOURS. This gives the unit time to discharge the large capacitors in the power supply. After you wait, then take cover off being very carefull. Notice where there are capacitors (look like miniature coke cans) or any other component, you really want to avoid touching anything, And talking about touchingif you touch a tube wash your hand real well or preferably wear gloves. The oil from our skin will cause the tube to bust because of the interaction.

Another thing you can do is follow the above procedure to remove the cover but don't turn on the power.Carefully remove all the tubes. The unit might "power on" but can't be used. This would indicate one of the tubes is bad. If it does shut-down immediately, shop time.

Pure new-age component only amps/receivers are a lot harder to diagnose as there is solder work involved to test the individual part. So this need to be done in a shop as well.

I would love to help but can't, I can only guide you a bit.

Good Luck!!!
Jeff

Jan 26, 2008 | Audio & Video Receivers

Not finding what you are looking for?
Audio & Video Receivers Logo

Related Topics:

97 people viewed this question

Ask a Question

Usually answered in minutes!

Top Audio & Video Receivers Experts

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

68157 Answers

yadayada
yadayada

Level 3 Expert

60667 Answers

Are you an Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...