Re: [Harp-L] AN HELP ABOUT FENDER BLUES DE LUXE REISSUE AMP.

["Splash" <celtiac@xxxxxxxxx>]

The circuit was designed for 12AX7s.

12AU7s draw more current than 12AX7s.

Even though they produce less overall gain.

Be careful if there are Op-amps in that series circuit or other
less-than-robust components, they might not be able to handle the extra
current.

Older point-to-point wiring amps with good old American Made Allen Bradley
resistors etc, are not going to have any problems with the extra heat but
newer amps with a mix of solid state components and fiberglass etched
circuit boards built by bean counters looking to clip corners by using
less-than-robust components to maximize the $$ profits might have a problem
with the larger currents drawn by 12AU7s.

I'd recommend a 12AY7 in V1.

If that doesn't tame it enough, try a 12AY7 in V2, the gain stage for the
tone stack.

The Phase inverter V3 can also be changed to a 12AT7.

I don't recommend swapping to 12AU7s in a modern circuit board amp because
of the higher current they draw.

PEACE
Scott
Believe in Magic!
----- Original Message -----
From: "David Harris" <snakehead_1@xxxxxxxxx>
To: "Gianfrancesco Leone" <gianfrancesco_leone@xxxxxxxxx>;
<harp-l@xxxxxxxxxx>
Sent: Wednesday, May 21, 2008 8:50 AM
Subject: Re: [Harp-L] AN HELP ABOUT FENDER BLUES DE LUXE REISSUE AMP.


> Gianfrancesco,
>   Great Myspace page.  I really like your sound.
>
>   Here is a schematic for your amp:
>
>
http://cachepe.samedaymusic.com/media/Blues_Deluxe_Schematic-fa963f656536095
504322d83581f8bd4.pdf
>
>   Try these tubes in your Fender Blues Deluxe amp:
>
>   V1=12AX7
>   V2=12AU7
>   V3=12AU7
>
>   You shouldn't need to do much else.  I believe it will sound best with
your Green Bullet mic instead of the SM57.  Just make sure you are playing
with a tight cup on your mic.
>
>   Please let me know how it sounds.  If possible, record a before and
after clip to hear the difference.  I would like to hear your song "Lionharp
Shuffle" afterwards.
>
>   Good Luck,
>
>   Dave Harris
>   http://www.myspace.com/superdharris
>
>
> Gianfrancesco Leone <gianfrancesco_leone@xxxxxxxxx> wrote:
>
> Greetings all,
>
> I have just bought a Fender Bules Deluxe amp. I generally use a Green
Bullet mic. or a Shure SM57.
> Which are, according to you, the more suitable modifications for reducing
at the most the feedback?
>
> For instance, is it enough to replace the pre-amp tubes or is it possible
to do something else?
>
> Unfortunately, I am not very skill...
> I mean...which types is better to use: 12AY7, 12AT7, 12 AU7? And, above
all, WHERE TO PUT THEME ( V1-V2-V3 )?
>
> I'll be glad indeed if you kindly would write me some advices!
>
> Thank you very much in advance.
> And all the best from Rome
>
> Gianfrancesco Leone.
> MySpace: http://www.myspace.com/gianfrancescoleone
>
> My present band: http://www.specialbeat.it/home.htm
>
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>
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