Tube Amp Output Transformer Troubleshooting

Tube Amp Output Transformer Troubleshooting. If possible, unplug the speaker(s) connected to the amp and connect an alternate speaker using an alternate speaker cable. If they arent, the best thing you can hope for is that you blow a fuse and not a tube, resistor or the output transformer.

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Do some tube swapping to locate the problem. So many inexperienced players jump to the conclusion that, i blew my output transformer at the first sign of amp trouble many of them couldnt find the output transformer on their amp for a crisp new $100 bill the op needs to take the amp to an experienced tech to have the problem (whatever it turns out to be) identified and repaired odds are that the. At any given time, a point of contact in the circuit could be holding a high amount of voltage.

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Go once over the tube amp debug pages, (click on the link in the upper left corner) that may help you to track down the problem. Turns = 33 x root of 2500 = 33x 50 = 1650 turns, 5 layers prim, sec, prim, sec, prim.

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If the fuse blows then you probablyhave a shorted filter cap or in extreme circumstances, a blown power transformer. At this point, you will need to look over the entire amp to see if there is shorting somewhere in the amp.step 2:

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There might also be an interruption in the early power supply: The right pic shows a stereo leak amplifier.

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For instance, a failing power transformer. If they arent, the best thing you can hope for is that you blow a fuse and not a tube, resistor or the output transformer.

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Remove the output and rectifier tubes. The output transformer is open or otherwise faulty.

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87 and 91 volts on the second outputs to rectifier pin 4 and 5. It is recommended that you unplug the amp and let it sit for at least 15 minutes to allow any charged components to discharge.

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Id suspect that your output transformer is ok. Always try another guitar, guitar cable, speaker and speaker cable.

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The a side of the main output cap measures 307 volts and the b side measures 327 volts. Take all the tubes out of the amp, replacethe fuse and turn on both switches.

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It is recommended that you unplug the amp and let it sit for at least 15 minutes to allow any charged components to discharge. Cris klarsen01 junior tube assistant posts:

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The right pic shows a stereo leak amplifier. 3) turn amp power on, and standby on.

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Remove the output and rectifier tubes. Tubes sometimes develop internal hum, for reasons known only to themselves.

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In this case, your trouble is either coming from the input circuit or the output circuit. This is not going to be fixable at the gig.

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Capacitor 2 output is 275 volts. Always try another guitar, guitar cable, speaker and speaker cable.

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At this point, you will need to look over the entire amp to see if there is shorting somewhere in the amp.step 2: So many inexperienced players jump to the conclusion that, i blew my output transformer at the first sign of amp trouble many of them couldnt find the output transformer on their amp for a crisp new $100 bill the op needs to take the amp to an experienced tech to have the problem (whatever it turns out to be) identified and repaired odds are that the.

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8,000 ohm primary to 8 or 16 ohm secondary for use with a single 6v6. This is not going to be fixable at the gig.

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4,000 ohm to 4 or 8 ohm for use with a single 6l6, el34 or two 6v6s in parallel. In this case, your trouble is either coming from the input circuit or the output circuit.

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A rousing rendition of “smoke on the backline” can often follow. 4) turn off and check fuses.

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The output transformer is the heart of a valve amplifier. Contrary to popular belief, the power and output transformers are the least likely cause of amp problems.

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Cris klarsen01 junior tube assistant posts: Do not remove the transformer from the amplifier before you start.

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8,000 ohm primary to 8 or 16 ohm secondary for use with a single 6v6. Not sure about air gap, there is some info on the web.

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Where b = ac flux, i have used 8000 here. The speaker wiring has deteriorated, or the jacks have rusted to the extent that they can no longer make the proper connection. The right pic shows a stereo leak amplifier.

Always Try Another Guitar, Guitar Cable, Speaker And Speaker Cable.

B= (1.10 ^8 x volts) / 4.44 x frequency x area x turns. For more complex fuses, remove inputs and outputs to the transformer one by one to determine what component of the entire circuit is causing the short. Id suggest an examination of the connections and resistors attached to the tube that has to be removed for the amp to work.

4) Turn Off And Check Fuses.

So many inexperienced players jump to the conclusion that, i blew my output transformer at the first sign of amp trouble many of them couldnt find the output transformer on their amp for a crisp new $100 bill the op needs to take the amp to an experienced tech to have the problem (whatever it turns out to be) identified and repaired odds are that the. Tube/valve amplifiers use potentially lethal high voltages. Cris klarsen01 junior tube assistant posts:

Make Sure A Speaker Or Dummy Load Is Connected To The Amp Every Time It.

87 and 91 volts on the second outputs to rectifier pin 4 and 5. Tubes sometimes develop internal hum, for reasons known only to themselves. There might also be an interruption in the early power supply:

Identify Which Wires Are Which By Circuit Connection.

Go once over the tube amp debug pages, (click on the link in the upper left corner) that may help you to track down the problem. Visual inspectionwhen it comes to a blown fuse, the usual suspects are two pins on a tube socket being shorted together, a tube that has developed an internal short (after many hours of play time), a bad component such as a filter cap or missing. If possible, unplug the speaker(s) connected to the amp and connect an alternate speaker using an alternate speaker cable.