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I tried to build a couple of guitars but that did not go so well. I think I could perhaps build high quality guitars if I had the type of CNC machines I think I would need.

I got interested in designing and building tube amplifiers. Most were for guitar and a couple for other instruments. I was pretty happy with the results of that endeavor. Learning how vacuum tubes work was a bit difficult because so few people understand them now days.

Anyone here build that kind of stuff?

Billy


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Originally Posted By: Planobilly
I got interested in designing and building tube amplifiers. Most were for guitar and a couple for other instruments. I was pretty happy with the results of that endeavor. Learning how vacuum tubes work was a bit difficult because so few people understand them now days.

Anyone here build that kind of stuff?

Billy

I've built plenty of solid state equipment (my background is in industrial electronics design and engineering), however, there are many here who are far more versed than me. I think our esteemed Irish friend has done a fair share of impressive development in this area.


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HI Billy.
You may find this link below interesting this man knows his tubes.
And shows you how to use Pentodes as Triodes.

http://www.audiodesignguide.com/New2A3/ETF06TS.pdf

I have built many valve amps in the past back in the days of the Mullard 510 etc.
Presently I have a commercial one a BUGERA set to run in triode mode for indoor use. I can switch back to pentode mode if I need the power for playing out (lol)

After a lot of research I opted for a 12 inch speaker combi 22 watt class A 2x EL84 power 3x ECC preamp and phase splitter good price of £271 incl. £45 vat
Make Bugea V22
A useful feature is the output pentodes can be switched to triode mode less power for home use giving a slightly even more vintage sound at home levels, nice!

The main features of the Bugera V22 Infinium Guitar Amp Combo include:

22 watt Class A combo amplifier
2 channels
Master volume
3x 12AX7 preamp tubes
2x EL84 poweramp tubes
12" Turbosound speaker
Integrated reverb effect
Infinium Tube Life Multiplier Technology
Footswitch included (Channel select, Reverb)
Vintage EQ
Features:
Manufacturer: BugeraPower
Output (Watt): 22
Stereo: No
Tubes (Poweramp): 2x EL84 (6BQ5)
Pre amp and phase splitter 3x 12 ECC83 (12ax7)
Speaker Manufacturer: TurbosoundSpeakers: 1x12"
Number of Channels: 2
Amp modeling: No
Reverb: Yes
Internal Effects: No
Effects loop: Yes
Recording Output: No
Headphone Connection: No
AUX Input: No
USB Connection: No
MIDI Interface: No
Foot Switch Connection: Yes
Incl. Foot Switch: Yes
Connection for External Speaker: Yes
Wheels: No
Front panel design: Straight Width (mm): 572Height (mm): 453Length (mm): 270Weight (kg): 19.4
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Last edited by Mike Head; 09/30/20 12:34 AM.

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One of several amps I have built. This one is a little like a Fender Deluxe Reverb. Around 20 watts and good for studio work...not so good live.



This one is a pretty complex 150 watt I designed for metal style music. Cost way to much money to build. You can probably hear it at your house every time I crank it up...lol



I have a small CNC mill to cut out holes with precision.

https://youtu.be/4ticSbbsiLw

This is what the work bench looked like four years ago...

https://youtu.be/GiIjB9jxQis

Billy

Last edited by Planobilly; 09/30/20 02:54 AM.

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To comment on what Video Track said, I always had in mind to learn more about solid state electronics. I got so deep into tube/valve electronics I just have never found the time.

To Mike's comments about tubes/valves I have a supplier in California who has been able to provide most anything I wanted to my specifications. Between his and my own connections with Russian suppliers, I can normally get what I want.

Finding both electrolytic and other types of capacitors that I liked the sound of has been far from easy. There are a couple of very talented people that have built transformers for me more or less to my specifications...people who actually know what they are doing.

Fun stuff to mess around with!!

Billy


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This is interesting...to be honest, I'm not much of a handy man. The idea of building my own equipment has never crossed my mind. I have have always been the person who wants to just pay the money and have my equipment work from the get go. I know some people get a lot of joy from tinkering though. And I can see how rewarding it'd be the build this kind of stuff yourself.


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Deryk
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Hi Deryk,

This has been fun stuff for me. Part of the reason for building amps is to be able to play through a type of amp I don't want to try to afford. Although it is normally less expensive to buy a modern tube amp than build one, that does not hold true for vintage amps.

There are at least four types of guitar amps nowadays. Solid state, vacuum tube, modelling, and hybrid. All have there use. What people like is very subjective.

Vacuum tube technology may be an old arcane science but it is far from going away. In fact you probably have it in you house today in your microwave oven. There are certain frequency's which can not currently be dealt with using transistors. Some of the latest technology is trying to use vacuum tubes to solve these issues.

Billy


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I have built an amp, and made mods to a few things I picked up through the years. Mostly, the amps ended up burning up. Some were quite spectacular when the magic smoke and the mysterious sparks escaped. So I stick with factory built amps now days.

One design I built actually sounded really nice... crisp and plenty loud. It was based on the 50W Marshall amp. I could never get the bias on the output tubes quite right and that one ended up being taken back apart and stuck in a box where the parts sit to this very day. It would do really well for several minutes and then it would "run away" and fry the tubes. It was fun building it but I didn't really have the time to mess with it and tweek it properly.

Last edited by Guitarhacker; 09/30/20 04:38 AM.

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Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.
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Guitarhacker...I had to chuckle about the parts stuck in a box comment. Yep, I too have some projects that are setting around which will most likely never be finished. One in particular that irritates me every time I think about it has about $2500 worth of new parts.

The road to my success has been paved with bricks of failure...

Billy


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Originally Posted By: Mike Head
HI Billy.
You may find this link below interesting this man knows his tubes.
And shows you how to use Pentodes as Triodes.

http://www.audiodesignguide.com/New2A3/ETF06TS.pdf

I have built many valve amps in the past back in the days of the Mullard 510 etc.
Presently I have a commercial one a BUGERA set to run in triode mode for indoor use. I can switch back to pentode mode if I need the power for playing out (lol)

After a lot of research I opted for a 12 inch speaker combi 22 watt class A 2x EL84 power 3x ECC preamp and phase splitter good price of £271 incl. £45 vat
Make Bugea V22
A useful feature is the output pentodes can be switched to triode mode less power for home use giving a slightly even more vintage sound at home levels, nice!

The main features of the Bugera V22 Infinium Guitar Amp Combo include:

22 watt Class A combo amplifier
2 channels
Master volume
3x 12AX7 preamp tubes
2x EL84 poweramp tubes
12" Turbosound speaker
Integrated reverb effect
Infinium Tube Life Multiplier Technology
Footswitch included (Channel select, Reverb)
Vintage EQ
Features:
Manufacturer: BugeraPower
Output (Watt): 22
Stereo: No
Tubes (Poweramp): 2x EL84 (6BQ5)
Pre amp and phase splitter 3x 12 ECC83 (12ax7)
Speaker Manufacturer: TurbosoundSpeakers: 1x12"
Number of Channels: 2
Amp modeling: No
Reverb: Yes
Internal Effects: No
Effects loop: Yes
Recording Output: No
Headphone Connection: No
AUX Input: No
USB Connection: No
MIDI Interface: No
Foot Switch Connection: Yes
Incl. Foot Switch: Yes
Connection for External Speaker: Yes
Wheels: No
Front panel design: Straight Width (mm): 572Height (mm): 453Length (mm): 270Weight (kg): 19.4
0


Hi Mike

I went through the audio design guide. Thanks. Interesting curves on some of the tubes.

At one time I had an interest in trying to use different types of tubes.

I sort of came to the conclusion that I most liked the sound of 6L6 and EL84's and EL844's.

I have built amps using 6v6s, EL34, KT66, and 6550's.

All of those are pretty standard tubes which was one of the considerations. I had a guy who was asking me to design amps for him. I really had little time or interest in any of this from a business prospective but it probably influenced my choice of tubes. It took me a couple of years before I found the connections to get consistent quality tubes.

The further I dug into all this the more I began to understand the tone was as much a function of capacitors and transformers as tubes. Also that speakers type/brand made a huge difference in the sound.

I had always approached all this from a intellectual perspective. In the end I came to realize there was as much art as physic involved. Fun stuff!

Just a word of warning to any of you who may be thinking of building this kind of stuff. This is high voltage electronics and even when unplugged the charge in the electrolytic capacitors can kill you. Keep one hand in you pocket.

Cheers,

Billy


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As one who once set a Heathkit shortwave radio kit on fire, and one who still has horrible soldering skills, I let the people who know what they are doing do what they do. I think my homeowner's insurance carrier would cancel my policy if they found out I was trying to build an amp. So I just buy them. I just bought a 150w Line 6 Spyder III modeling amp for $100 and that is way too loud to use at home so I still use the Line 6 practice amp. I haven't even made it through testing all the modeling presets on the Spyder yet. Then I have to find the amp setting I want and add to it the sounds from the Pocket Pod..... and I am not really a guitar player! I do like collecting guitars because it looks so cool to have a guitar farm!

Next up is the Harley Benton thin body acoustic, followed quickly by the white on white Squire Classic Vibe model Jazzmaster. The guitar will run $400, and the white pickguard will be another $20 or so. As soon as the dust settles on my house refi (I sign the new mortgage Thursday) and I can spend again, I will put a few more animals in that farm!! And somehow I never seem to get that I need more stands, more straps, more strap locks.... never stops.

Last edited by eddie1261; 09/30/20 03:03 PM.

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1. How much did you make in 2023?
2. Send it to us.
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I have always wanted to build amps and guitars as well. I ended up buying a fender mustang II it is loud and has a ton of “voices” for me it has been all I have ever needed. Sadly anymore I can never find a place to air it out.


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Originally Posted By: Rob Helms
I have always wanted to build amps and guitars as well. I ended up buying a fender mustang II it is loud and has a ton of “voices” for me it has been all I have ever needed. Sadly anymore I can never find a place to air it out.


Then the next thing you need to build is a man cave! 12x8 shed kit would do you nicely!!

I think the fire clause of my homeowner's insurance has a clause in it that keeps me from trying anything that requires good soldering and 120v of AC current.


I am using the new 1040XTRAEZ form this year. It has just 2 lines.

1. How much did you make in 2023?
2. Send it to us.
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I've got a diploma in electronics production and repair, and have spent the last half a decade getting into tube electronics (since that isn't taught at college anymore). I've designed and built a number of tube amps and tube preamps, as well as guitar pedals containing tubes. I've also repaired piles of tube amps - my current favourite is my Rivera Knucklehead from the mid 90's, closely followed by a late 80's Carvin X100b (and I would love love LOVE to have the Mesa Single Rectoverb and the Vox AC30CC2 that I rebuilt for a studio partner of mine, and the original JCM800 50-watt I repaired for a former client).

I tend to prefer amps with 6L6 or EL34 over the smaller tubes, even at lower volumes. Little bit more "oomph" and loads more clean headroom.

Besides stuff with tubes in them, I've designed and built quite a pile of solid state guitar pedals, mic preamps, amplifiers, synthesizers, and a ton of other things. I'd love to get more into building and repairing microphones, as I have a few high-end condenser mics that could use a capsule re-skinning, though I did successfully replace the ribbon on a cheap ribbon mic, and re-attached a separated diaphragm on an SM57 (which for some reason now sounds loads better than my other 3 Sm57's, strange).

The nicest thing in the world is when someone asks "hey, how did you get that great sound? I want the same sound!" and I tell them "oh, it's this thing I custom built, nobody else has one".

Last edited by Simon - PG Music; 10/05/20 01:08 PM.

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