IvanP
Joined: Feb 27, 2006
Posts: 10331
southern Michigan
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Posted on Jan 28 2014 12:07 PM
This is from the current issue of the Guitar Aficionado magazine (I got a complimentary subscription with a book I bought), with Eddie on the cover. It's nice to see even guys like that appreciate the brownface magic! (I think you should be able to click on the photo to enlarge it, so it's easier to read.)
— Ivan
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big_papu
Joined: May 17, 2006
Posts: 657
Buenos Aires
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Posted on Jan 28 2014 12:13 PM
the real "brown sond" 
— El Papu & los Fantasticos Reverberantes
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JObeast
Joined: Jul 24, 2012
Posts: 2762
Finknabad, Squinkistan
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Posted on Jan 28 2014 03:46 PM
How quiet does he mean and how does that work?
— Squink Out!
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TVTheWiredTurtle
Joined: Dec 03, 2009
Posts: 859
Sandy Eggo
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Posted on Jan 28 2014 08:42 PM
Pete Townsend had the brown sound rockin first, sorry mister Eddie 
Pete's bassman
*Excerpt from The Soul of Tone: Celebrating 60 Years of Fender Amps interview with Alan Rogan
“Pete has used Fender amps off and on for 40 years. [Re: the My Generation album:] I said, ‘Oh, Pete, it sounds fantastic,’ and he told me exactly what he used on it: two Rickenbackers — a 6-string and a 12-string — and a blonde Bassman head with a Marshall 4x12 cab. That was the sound on that album, from 1965.”
*
*From April 1980 issue of Sound International article, courtesy Joe G’s site.
PT: Yeah. I never used Marshall amps, I didn’t like them. I had Fender amps, a Fender Pro and a Fender Bassman and two 4 x 12s. Each one didn’t drive its own speakers, it drove those two Marshall 4 x 12 cabinets. And I kept that set-up for a long time.
*
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Last edited: Jan 28, 2014 21:05:03
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JObeast
Joined: Jul 24, 2012
Posts: 2762
Finknabad, Squinkistan
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Posted on Jan 28 2014 08:54 PM
And we all thought he was using AC30s. Wasn't Marshall basically copying the Bassman, with locally available components?
— Squink Out!
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BJB
Joined: Jul 28, 2008
Posts: 413
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Posted on Feb 07 2014 09:09 AM
Plugging into the external speaker jack makes the amp real quiet, alright. When nothing is plugged into the 'normal' speaker jack, the output is shorted to ground through the empty jack. Only the short isn't perfect and some power is available through the external jack. Since the output is partially shorted, there is a high risk of blowing the tubes and destroying the amp.
A safer alternative is a speaker attenuator. The simplest is an L-pad and more complicated attenuators are available. Ted Weber sells them and has some pretty good information about the benefits and dangers of attenuators on his site.
http://www.tedweber.com/atten.htm
— If it ain't broke, fix it until it is.
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ArabSpringReverb
Joined: Jul 13, 2012
Posts: 490
San Diego CA
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Posted on Feb 07 2014 03:44 PM
Thanks for pointing that out BJB...it just sounded so wrong (the extension jack used only)...I had always thought that you should never turn on an amp that doesn't have speakers hooked up or risk catastrophic damage to the OT.
EVH also used a Variac on his Marshall head for the 'brown sound' and I've heard this will also fry an amp.
Both classic cases of 'fixing it until it's broken'
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tubeswell
Joined: Sep 24, 2011
Posts: 1424
Wellington, NZ
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Posted on Feb 07 2014 04:05 PM
JObeast wrote:
And we all thought he was using AC30s. Wasn't Marshall basically copying the Bassman, with locally available components?
The Marshall JTM45 is more or less an exact copy of a Fender 5F6A circuit, albeit that Jim Marshall used locally available transformers, speakers (and 2 x 12s instead of 4 x 10s), caps and resistors etc.
— He who dies with the most tubes... wins
Surf Daddies
Last edited: Feb 07, 2014 16:06:47
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BJB
Joined: Jul 28, 2008
Posts: 413
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Posted on Feb 08 2014 12:54 AM
One change Jim Marshall made was in the power supply for the preamp. He used a pair of 10K resistors, which are larger than the resistor values that Fender used. This causes the preamp to run at much lower voltages, which enhances harmonic distortion. Don't forget that a tube doesn't need to clip in order to distort, and this form of 'clean' distortion is the kind that guitar players like. Sadly, Leo Fender did not like it and you will notice that he increased the preamp voltages higher and higher as he went from the tweed to the brown to the blackface amps. The silverface amps lowered the preamp voltages a bit but the amp gurus would have us raise them up again when 'blackfacing' an amp.
— If it ain't broke, fix it until it is.
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