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Post subject: Re: I think I have a blown transformer
Posted: Sat Nov 12, 2011 3:26 pm
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There is a difference between flaming someone, and bluntly pointing out when someone has done something incredibly stupid and dangerous. It seems that the ill feelings that you perceive are because you insist that what you did was somehow justified, going against a combined century or so of experience that says otherwise.

If you don't want to know how stupid your actions were, then don't ask. You didn't give the impression that you were willing to learn by asking questions, but rather just wanted to rag on the guy that you traded with.

I am in no way saying that you are a stupid person, quite the contrary. But, what you have done here is incredibly stupid. You should take the great advice offered and move on. If not, you will probably do the same thing over again, and maybe start a fire next time.

And yes, replacing the fuse several times to see "where the sparks were coming from" is troubleshooting. Poor and the wrong way, but still troubleshooting. The word troubleshooting means to find out where the trouble is (sparks). There is a much better way, but you aren't into learning from experts, and I do mean experts. Only a foolish person would ignore this advice.

BTW, if you had replaced the fuse with the "exact same fuse" that came in the amp, as you stated, then you would have put in the same exact fuse, which you didn't.

Trying to BS these forum members is fruitless, pretty sharp bunch here. 8)

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Post subject: Re: I think I have a blown transformer
Posted: Sun Nov 13, 2011 7:26 am
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That's why I'm having a tech do it. I've replaced transformers myslft before, but those were on working amps where I didn't have to figure out what's wrong with it.


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Post subject: Re: I think I have a blown transformer
Posted: Sun Nov 13, 2011 8:05 am
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shimmilou wrote:
There is a difference between flaming someone, and bluntly pointing out when someone has done something incredibly stupid and dangerous. It seems that the ill feelings that you perceive are because you insist that what you did was somehow justified, going against a combined century or so of experience that says otherwise.

If you don't want to know how stupid your actions were, then don't ask. You didn't give the impression that you were willing to learn by asking questions, but rather just wanted to rag on the guy that you traded with.

I am in no way saying that you are a stupid person, quite the contrary. But, what you have done here is incredibly stupid. You should take the great advice offered and move on. If not, you will probably do the same thing over again, and maybe start a fire next time.

And yes, replacing the fuse several times to see "where the sparks were coming from" is troubleshooting. Poor and the wrong way, but still troubleshooting. The word troubleshooting means to find out where the trouble is (sparks). There is a much better way, but you aren't into learning from experts, and I do mean experts. Only a foolish person would ignore this advice.

BTW, if you had replaced the fuse with the "exact same fuse" that came in the amp, as you stated, then you would have put in the same exact fuse, which you didn't.

Trying to BS these forum members is fruitless, pretty sharp bunch here. 8)

I didn't put the exact same fuse in it, iput the CORRECT fuse in it. I bought a 3A 250V fast blow fuse, which was listed at the one to use, I didn't look at the fuse he used when I bought one, I looked for what it called for. I realized he used a sllow blow when I lookedat the filiment on the one I took out and it was at least 10 times as thick: the fast blow looks lke the width of a a thread or hair, the one that was in the amp when I got it looked like, actually exafclty like a woundA or low E string.

I don't mind hearing when I did sonething wrong, I git pissed when the most vocal one was the same one that a day or 2 earlier jumped on advice regarding stringsi gave someone, and in soany words or less said it was dum suggestiin, has no basis in truth, etc. Then the kid dikd what I told him to do, and low and hehold, it worked. Then the poster attacking my advice was nowhere to be foud after the kid thanked me for the advice, only to reappear on this thread.


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Post subject: Re: I think I have a blown transformer
Posted: Sun Nov 13, 2011 11:55 am
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windwalker9649 wrote:
That's why I'm having a tech do it. I've replaced transformers myslft before, but those were on working amps where I didn't have to figure out what's wrong with it.


Good idea. You are correct, diagnosing (troubleshooting) effectively can be much more difficult/dangerous than doing upgrades. If it weren't so, good techs couldn't charge so much. :wink:

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Post subject: Re: I think I have a blown transformer
Posted: Tue Nov 15, 2011 12:05 pm
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I figured it out. I didnt blow the OP tranny. THe power tubes were bad, and arching. Thats what was sparking , not the tranny. Its also what caused the fuse to blow. On a suggestion, i opened it, drained the filter caps, and saw the carbon on the tube sockets.


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Post subject: Re: I think I have a blown transformer
Posted: Tue Nov 15, 2011 12:09 pm
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I have to fix my laptop, IM reading my posts, the typos from my cell phone look like another language. I also found out (to my surprise) that slow blow are what's supposed to be used. Though this seems counterintuitive to me. Seems like if it blows slow, it allows more damage. If someone were to be so kind as to pull their fuse out and tell me if its slow/fast. The fast should be about the thickness of thread, slow looks like a wound A or Low E string.. I need to know for sure. EVery place i look just says 3A 250V, but nothing about the blow factor (blow factor in this case is about the fuse, not blowhard) :mrgreen:


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Post subject: Re: I think I have a blown transformer
Posted: Tue Nov 15, 2011 12:11 pm
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Actually, I'll just pull out hte fuse from a BLues JR. It'd probbly call for the same type of fuse, maybe just different values. Unless someone has a Deluxe HR, Deville or BBlues deluxe close by.


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Post subject: Re: I think I have a blown transformer
Posted: Tue Nov 15, 2011 12:14 pm
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Actually scratch that, please look. I forgot the Blues Jr doesnt have a standby switch (that will change this weekend when I put a 3 way switch in so I'll have a standby function). That may change thefast/slow blow factor on the fuse since the DHR is always turned on on standby, and the Blues Jr just turns on, it may require a slow blow, while the DHR may be able to get by with a fast blow.


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Post subject: Re: I think I have a blown transformer
Posted: Tue Nov 15, 2011 3:40 pm
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The correct fuse for the HRDlx amp would be a normal fuse (fast-blow) AGC 3A 250V. The fuse has to be a high enough value to withstand the inrush of current for the tranny, while still being able to quickly blow to protect the amp in case of output problems, ie shorted tube. The fuse is labeled AGC 3 on one end, indicating a normal 3-amp (fast-blow), and labeled 250 volts on the other end. A fuse labeled MDL 3 on one end, indicates a time-delayed 3-amp (slow-blow), and also labeled 250 volts on the other end. You can usually tell the difference when comparing the filaments, which are typically much thicker and wound on the slow-blow. :idea:

Not all amps use the same type of fuses, some use fast-blow, some use slow-blow.

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Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


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