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Post subject: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Fri Jan 03, 2014 11:27 pm
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Working on a Blues Junior amp today, set the Bias and got to wondering why the heck Fender hasn't ever fixed this issue. It wouldn't cost a cent of difference to correct. Substituting a resister on the production line (change R52 from 22k to 27k) would be the total requirement to get the bias into a ballpark of 70% dissipation, instead of 100+%, I mean they substitute the Tolex colours and speakers every second week :lol: The tubes would last longer, the amp would sound nicer and the removal of that extra heat from the hot bias would also extend the life of the circuit board, mounted sockets and soldering. Win/Win all around.

I'll shut up now....

Snowy.


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Post subject: Re: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Fri Jan 03, 2014 11:51 pm
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No457 Snowy wrote:
and the removal of that extra heat from the hot bias would also extend the life of the circuit board, mounted sockets and soldering.


That's the last thing that FMIC wants.

:wink:

Arjay

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Post subject: Re: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Sat Jan 04, 2014 12:13 am
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I suspect you may be right Arjay. It's also weird in that context that they consistently Bias the DRRI colder than a Mother In-law's kiss, maybe the Fender Bean Counters need to revisit that one. :lol: Sometimes it's like they haven't actually got a clue anymore.....

Snowy


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Post subject: Re: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Sat Jan 04, 2014 1:40 am
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I'm with you Snowy. I have wondered what the thinking is behind such a hot bias in this particular amp, and only this amp. :x

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Post subject: Re: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Sat Jan 04, 2014 10:42 am
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No457 Snowy wrote:
Working on a Blues Junior amp today, set the Bias and got to wondering why the heck Fender hasn't ever fixed this issue. It wouldn't cost a cent of difference to correct. Substituting a resister on the production line (change R52 from 22k to 27k) would be the total requirement to get the bias into a ballpark of 70% dissipation, instead of 100+%, I mean they substitute the Tolex colours and speakers every second week :lol: The tubes would last longer, the amp would sound nicer and the removal of that extra heat from the hot bias would also extend the life of the circuit board, mounted sockets and soldering. Win/Win all around.

I'll shut up now....

Snowy.


Is this something I can do to my (ancient) blues jr without killing myself?


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Post subject: Re: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Mon Jan 06, 2014 8:16 pm
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shimmilou wrote:
I'm with you Snowy. I have wondered what the thinking is behind such a hot bias in this particular amp, and only this amp. :x


Because it has the word Blues in its title.

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Post subject: Re: Why doesn't Fender just fix the Blues Junior Bias?
Posted: Mon Jan 06, 2014 8:44 pm
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Ooooooooh! Now I see. :lol:

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