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Post subject: Re: Death of a blues junior
Posted: Mon Jun 30, 2014 12:13 am
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To post a photo. Go to Photobucket. Or some online site to share media. Upload your photos.


For Photobucket:

1.) Click onto photo you wish to post. See "Links to Share The Photo" on the right side?

2.) Now, scroll your mouse (the computer's mouse :lol: ) over the IMG address window.

3.) Left click onto address window.

4.) It will say: "Copied"

5.) Now, paste the copied IMG address into the window of this Forum.

6.) So... this:

{URL=http://s1191.photobucket.com/user/BMW2002Ti/media/dead-horse_zpsc9e97b9b.gif.html}{IMG}http://i1191.photobucket.com/albums/z461/BMW2002Ti/dead-horse_zpsc9e97b9b.gif{/IMG}{/URL}


7.) Becomes this, when the { } that I placed into address line is kept as the original [ ]:




Image


:lol: :lol: :lol:


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Post subject: Re: Death of a blues junior
Posted: Mon Jun 30, 2014 1:27 am
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Glender, if it's of any help and you want to email me the jpegs I can host them on our server and link them here for you.

Snowy


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Post subject: Re: Death of a blues junior
Posted: Mon Jun 30, 2014 2:41 am
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Pictures , how to ;

forums.fender.com/viewtopic.php?f=2&t=52777&hilit=Nutter%27s+guide


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Post subject: Pics of the Death of a blues junior
Posted: Fri Jul 11, 2014 11:56 pm
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So...power tube just freaked out? Faulty tube? Instillation?
I just read I could get shocked even with amp un plugged. How the hell does that work?

Image

Image


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Post subject: Re: Death of a blues junior
Posted: Sat Jul 12, 2014 9:17 am
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That certainly looks like damage due to a faulty output tube, and I would look for the screen grid resistors on the main board to be toasted also. "Biased hotter"? How hot? Too hot could have caused the tube failure.

This thread leaves a few questions. Why would a "tech" tell you it isn't worth repair? How was the bias adjusted, and to what specs? Why would you bring up the question of whether the foot switch was plugged into the wrong jack?

Blaming the OT for this indicates a lack of knowledge on the part of whoever suggested it, or an attempt to get out of what might be a warranty issue.

The amp can have the potential to shock when unplugged due to the caps holding a charge.

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Post subject: Re: Death of a blues junior
Posted: Sat Jul 12, 2014 10:03 am
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shimmilou wrote:
Blaming the OT for this indicates a lack of knowledge on the part of whoever suggested it, or an attempt to get out of what might be a warranty issue.


+1

Definitely something wonky at play there.

:shock:

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Death of a blues junior
Posted: Sat Jul 12, 2014 10:43 pm
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More questions etc.

This amp does not have a bias dial pot....so if the tech(s) did bias it each time tubes were changed there should be evidence of 3 or 4 solders. Ain't no evidence of any soldering.
Since it doesn't have a bias dial, wouldn't that mean it doesn't need to be biased when replacing tubes?

And
I misquoted tech re worth repair....I asked him if it was his amp what would he do....If repaired it would be unreliable. Also, Wait 9 months for a main board...or do a patch job (my interpretations).


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Post subject: Re: Death of a blues junior
Posted: Sun Jul 13, 2014 12:30 am
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Glender wrote:
More questions etc.

This amp does not have a bias dial pot....so if the tech(s) did bias it each time tubes were changed there should be evidence of 3 or 4 solders. Ain't no evidence of any soldering.
Since it doesn't have a bias dial, wouldn't that mean it doesn't need to be biased when replacing tubes?

And
I misquoted tech re worth repair....I asked him if it was his amp what would he do....If repaired it would be unreliable. Also, Wait 9 months for a main board...or do a patch job (my interpretations).


In your first post the tech told you he "biased it low to extend my tube life", then you took the amp back and it was "rebiased "hotter", as I mentioned in my earlier post the only way to do that on a stock BJr is add an adjustable bias, or change resistors entailing entire board removal to get at the traces. If there is no soldered bias resistors evident then he has been bull$&@tting you and taking your money and should not be trusted, plain and simple and that is just based on what he has told you.

The amp should have the bias checked/adjusted any time you change the power tubes, if you don't then all bets are off as to how long your new tubes will survive and sometimes they can take other bits with them when they go, starting to sound familiar?


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Post subject: Re: Death of a blues junior
Posted: Sun Jul 13, 2014 1:11 am
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No457 Snowy wrote:
If there is no soldered bias resistors evident then he has been bull$&@tting you and taking your money and should not be trusted, plain and simple and that is just based on what he has told you.


+1

That guy has been jerkin' your gherkin all along.

Find a new tech who's competent and trustworthy. Your nearby guitar and amp store may not be the most objective source of information -- talk with local musicians in your area to learn who can be trusted and who cannot.

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Death of a blues junior
Posted: Sun Jul 13, 2014 1:16 am
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Retroverbial wrote:
No457 Snowy wrote:
If there is no soldered bias resistors evident then he has been bull$&@tting you and taking your money and should not be trusted, plain and simple and that is just based on what he has told you.


+1

That guy has been jerkin' your gherkin all along.

Find a new tech who's competent and trustworthy. Your nearby guitar and amp store may not be the most objective source of information -- talk with local musicians in your area to learn who can be trusted and who cannot.

Arjay



+1

This repair is easy to do ,

The guy is not a tech for shure, if he is a tech is not qualified


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Post subject: Re: Death of a blues junior
Posted: Sun Jul 13, 2014 12:47 pm
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it's not beyond fixing. if the "tech" you use is so called "qualified" he should be able to fix it. it looks as if those burns are to the plastic pc board not to the soldier points. the trace seems burnt but a jumper can fix it. it all depends on what you are willing to pay to have it done. the amp should be fully trouble shot as well.


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Post subject: Re: Death of a blues junior
Posted: Mon Jul 14, 2014 11:28 am
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Hold on! I found the solder point. Tiny. Very clean.
Burns affect 3 solder points.


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Post subject: Re: Death of a blues junior
Posted: Tue Jul 15, 2014 11:19 am
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Ok, more detailed pics.

Bias resistor? Does this look like it's been soldered and re soldered 3 or 4 times?
Image

Scratched by a gremlin?
Image

How expensive to jump this?
Image


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Post subject: Re: Death of a blues junior
Posted: Tue Jul 15, 2014 11:30 am
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On the board , -C is the bias negative voltage . The 33K resistor with the new 220K in parallel is use on bias circuit


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Post subject: Re: Death of a blues junior
Posted: Tue Jul 15, 2014 7:33 pm
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+1 stratele52

R51 is the resistor that I replaced with a pot for adjustable bias.

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


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