jerryjg
PinkElephantologist
GOT HOMEBREW?
I've had two techs build me two different homebrew amps.
The one pictured is a Bogen CHB35 100 WATT PA amplifier designed around a proven Circuit.
It sounds very very good dirty. The cleans arent great.
It almost gets a early Led Zepplin sound through the right speakers. I'm very very pleased with this amp my buddy built.
QUOTE-(from a guitar forum )"There is an excellent article on Geofex about converting PA amps to guitar use. It involves cascading the gain stages to get a fair amount of preamp gain, rewiring the tone stack to values suitable for a guitar and changing input/outputs for guitar use. If you do all that, and the amp you choose has tubes with decent tone you can make yourself a nice all-tube for almost no money"_END QUOTE. That's why there's so many of them selling on ebay these days, there's becoming a market for guitarists wanting to do this.Apparentyl Terry Kath , the legendary Chicago guiatist wasa proponont of Bogens.
Anyone else built or had any homebrew amp experience?
I will also post a pic to the Bogen ampbuilders page ICAOII>.
[/IMG] FROM A Vintage Tube Amp tech- QUOTE-This involves converting old tube hifi and P.A. amplifiers
for use as guitar amplifiers. In general, I will need to bring the amplifier back up to factory spec first. Then, when the amplifier is again working correctly, I will modify the input stage to work correctly with a guitar and will also,upon request add additional gain stages as well as a master volume to give the user the same flexibility as found in any purpose made master volume guitar amplifier. I can go as far as you want. I can essentially gut the chassis and build a whole new amp or just modify the input stage so it works correctly with a guitar as the source. Many times these old P.A. amps can be had for under $100.00. They can be totally refurbished for about the same cost as a hi-fi amp rebuild, and then you can use them with the gain and drive they have or have an extra gain stage added to get searing overdrive at the twist of a knob. I have had great success doing this and it offers the musician on a budget, who may already have an old tube P.A. amp just collecting dust a way of getting in to t he classic sound of tubes without the huge price tag normally associated with modern production 'boutique' amps. Most of these old P.A. amps were designed to run all day long and were built tough. I can also modify the phono preamps of old mono hifi amps so that they will sound good with a guitar. Although not as tough as a vintage P.A. amp, these old hi-fi amps sound real nice. I design my own gain stages and because I am so familiar with the way tube amps work, I can easily modify existing tone control and high gain stages to work real good in a guitar amplification application. So, if you are tired of seeing that black face Fender or vintage Marshall go for about three times what you can afford on Ebay, you might want to consider buying something like an old tube Bogen P.A. amp and having me rebuild the amp and modify it for guitar use for you._END QUOTE
http://www.schematicheaven.com/hifi.htm
http://www.uglyamps.com/bogen.htm
I've had two techs build me two different homebrew amps.
The one pictured is a Bogen CHB35 100 WATT PA amplifier designed around a proven Circuit.
It sounds very very good dirty. The cleans arent great.
It almost gets a early Led Zepplin sound through the right speakers. I'm very very pleased with this amp my buddy built.
QUOTE-(from a guitar forum )"There is an excellent article on Geofex about converting PA amps to guitar use. It involves cascading the gain stages to get a fair amount of preamp gain, rewiring the tone stack to values suitable for a guitar and changing input/outputs for guitar use. If you do all that, and the amp you choose has tubes with decent tone you can make yourself a nice all-tube for almost no money"_END QUOTE. That's why there's so many of them selling on ebay these days, there's becoming a market for guitarists wanting to do this.Apparentyl Terry Kath , the legendary Chicago guiatist wasa proponont of Bogens.
Anyone else built or had any homebrew amp experience?
I will also post a pic to the Bogen ampbuilders page ICAOII>.
for use as guitar amplifiers. In general, I will need to bring the amplifier back up to factory spec first. Then, when the amplifier is again working correctly, I will modify the input stage to work correctly with a guitar and will also,upon request add additional gain stages as well as a master volume to give the user the same flexibility as found in any purpose made master volume guitar amplifier. I can go as far as you want. I can essentially gut the chassis and build a whole new amp or just modify the input stage so it works correctly with a guitar as the source. Many times these old P.A. amps can be had for under $100.00. They can be totally refurbished for about the same cost as a hi-fi amp rebuild, and then you can use them with the gain and drive they have or have an extra gain stage added to get searing overdrive at the twist of a knob. I have had great success doing this and it offers the musician on a budget, who may already have an old tube P.A. amp just collecting dust a way of getting in to t he classic sound of tubes without the huge price tag normally associated with modern production 'boutique' amps. Most of these old P.A. amps were designed to run all day long and were built tough. I can also modify the phono preamps of old mono hifi amps so that they will sound good with a guitar. Although not as tough as a vintage P.A. amp, these old hi-fi amps sound real nice. I design my own gain stages and because I am so familiar with the way tube amps work, I can easily modify existing tone control and high gain stages to work real good in a guitar amplification application. So, if you are tired of seeing that black face Fender or vintage Marshall go for about three times what you can afford on Ebay, you might want to consider buying something like an old tube Bogen P.A. amp and having me rebuild the amp and modify it for guitar use for you._END QUOTE
http://www.schematicheaven.com/hifi.htm
http://www.uglyamps.com/bogen.htm
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