Let's build the best amplifier you will ever play...

If I were to dream up a perfect amp for me, I would build one with 3 channels that are switchable. First channel would be a Fender blackface channel that can be switched from blackface to tweed on the face of the amp. Second channel would be a Plexi channel that is switchable from plexiglass to JCM. The third channel would be a Dumble circuit that is switchable between two of Dumble's best circuits, so in essence, it would be an amp with nine voices.

Now, how to do that.....that's a whole new episode.
 
Jeffblue said:
If I were to dream up a perfect amp for me, I would build one with 3 channels that are switchable. First channel would be a Fender blackface channel that can be switched from blackface to tweed on the face of the amp. Second channel would be a Plexi channel that is switchable from plexiglass to JCM. The third channel would be a Dumble circuit that is switchable between two of Dumble's best circuits, so in essence, it would be an amp with nine voices.

Now, how to do that.....that's a whole new episode.
Click to expand...

The closest I know -Theres an boutique amp company in Florida (name escapes me right now) that makes something in this vein -except Fender Blackface and Plexi 2 channel 1x12 open back combo -getting Dumble requires messing with the tone stack on the Black face channel -and you can get decently close -but you cant easily switch between then of course.

Nice amp for studio/recording especially

-expensive as you might imagine. -I think it was mid 2ks.
 
NegativeEase said:
The closest I know -Theres an boutique amp company in Florida (name escapes me right now) that makes something in this vein -except Fender Blackface and Plexi 2 channel 1x12 open back combo -getting Dumble requires messing with the tone stack on the Black face channel -and you can get decently close -but you cant easily switch between then of course.

Nice amp for studio/recording especially

-expensive as you might imagine. -I think it was mid 2ks.
Click to expand...

It's not exactly the same, but the Mesa Mark V comes really close to that description.

Power tubes are going to be a compromise because Fender tones don't sound quite right with EL-34s while Marshalls sound kind of off with 6L6s; I say that after having played a JCM800 circuit with 6L6s and a Mesa preamp with an EL-34 power amp. Of the two the 6L6/JCM800 sounded less 'off', hence my recommendation for the Mark V.
 
dystrust said:
It's not exactly the same, but the Mesa Mark V comes really close to that description.

Power tubes are going to be a compromise because Fender tones don't sound quite right with EL-34s while Marshalls sound kind of off with 6L6s; I say that after having played a JCM800 circuit with 6L6s and a Mesa preamp with an EL-34 power amp. Of the two the 6L6/JCM800 sounded less 'off', hence my recommendation for the Mark V.
Click to expand...

Uh, good point -I have a MkV and I totally agree. -I have an Origin Revival drive in the FX loop can make a dead on Plexi channel, also can make Dumble with the MkV graphic eq (cant really make a good Dumble on a non graphic amp without a pedal)

So yeah!!
 
beaubrummels said:
Part 1
Part 2
Part 4

…did I miss something?
Click to expand...

I missed adding the link in the repost on the second page. The OP has all links.

The dream amp idea with Fender, Marshall, and Dumble could be done, but it would be ungodly expensive! Having a variant for each channel might also have to get nixed, only because you would need a switching system that changes a dozen things out all at once. Could still be done, but when the switching system starts to get more complicated than the signal circuit, you have to start putting your hand up to at least question your sanity. I think the biggest problem would be, as already mentioned, is the compromise that you end up with each topology. The power supply for each amp is quite different, so you would have to pick one that will work for all of them, and the voltage and stiffness of each HT supply is part of what makes each amp tick. Mesa is a prime example of a company that tries to include everything and the kitchen sink into their designs, it's all good until something breaks, and then fixing it becomes a tech's worst nightmare. The other downside is there is never three or four AMAZING sounds in the amp, but more that out of the three-four tonal options it has, 1 or two are great and the others are just ok.

I am beginning to work on a new design with what is known as dual path. In short, each amp channel has 100% of its own tube circuitry, and neither shares any parts. This ensures that each channel is tuned for zero compromises over the other. The downside is extra power supply considerations, switching and a higher parts count.

In my latest video I go over pretty quickly how to acquire the parts for the amp I am showcasing. In all, there are about 75 individual parts or so needed to build the amp. After shipping and taxes, you are looking at about $600 for the amp using the parts I would go with. You could probably lop $100 or more off if you go with other options? The point is that when you double the parts count and time to build said amp, the cost starts getting bonkers. I charge $550 per day just In labor to build an amp. Most amps that are turn-key can be built in a day or two. Considering a cost of $1000 plus just in parts, and another couple hundred for tooling, utility costs, and a profit margin, you are easily sitting on a $3,000+ amp. If you buy a Ceriatone amp in the 100-watt range unfinished, you are looking at around $750 just for parts not including tubes, or the cabinet ( about another $300-$400 to acquire ) no shipping, and no taxes factored. After shipping and tax, you are easily sitting nearer $1k. You buy a set of basic tubes for $150 and get a cheap cabinet for $250, now you're right around $1,250 or so. Let's say you can't build the amp so you pay for a guy to do it, that could range from my price or more to half that. So another $500 on the low end ( most amps will take more than 1 day to build of that size ) to as much as $1,000. Your kit amp is now more expensive than just buying a real one.

This is why I created this series, to try and help you find the confidence to build it yourself. All those dangerous voltages they scare you with don't exist when you are building the amp. So as long as you build it right, you have little to worry about. Biasing and other troubleshooting items are easy to teach and there are a plethora of videos on the web to help you. It's just money in the end, but I feel that in the past few years there has been a higher interest from people to build their own stuff. Why is this? To save money and gain a skill I feel. I have that skill, although I lack the ability to present it very interestingly, and hope that I can help get you to build the best amp in the world.

The title of the series is obviously very tongue in cheek. While the series showcases my amp, it is not limited to that. I am just showing you how to read a schematic, make a layout, source the parts and build whatever your heart desires. My amp just happens to be what I am using to do it. I think my biggest flaw is lack of interesting commentary and B-roll shots, trying to present as much data as I can in as short a video as possible, and simply that while I may know what I mean, I have a tough time conveying it in words on a recording. I can write about stuff clearly and with articulation all day, but I hate my voice and my inflection, I trip over my words, and the thoughts pour out faster than I can say them with certainty. Basically, I'm boring to listen to.
 
NegativeEase said:
Loving this thread -I think an interesting challenge with building new amps be it from scratch and especially from a kit (I've done both many times) is often they sound a little sterile versus the amp style they are inspired from, sometimes with some playing and age the amps settle in, so I'm sure some of the mojo from our favorite amps is some time and heat cycles on the components -and then nostalgia messing with your empirical mind. -since Ive done blind A/B tests when recording amps -I know that the sterility of new amps is not just an emotional attachment thing.

When I first started working in recording studios, Peavey was most often the brand that you could often demonstrate "sterility" in an amp sound -maybe it is the components, the design, or the revolutionary manufacturing process -or maybe they were making a more on the noes or efficient amp which creates less nuance that the ear sounds pleasurable.
Click to expand...

Oh come on EZ. . . You need to use tone wood
 
NegativeEase said:
Loving this thread -I think an interesting challenge with building new amps be it from scratch and especially from a kit (I've done both many times) is often they sound a little sterile versus the amp style they are inspired from, sometimes with some playing and age the amps settle in, so I'm sure some of the mojo from our favorite amps is some time and heat cycles on the components -and then nostalgia messing with your empirical mind. -since Ive done blind A/B tests when recording amps -I know that the sterility of new amps is not just an emotional attachment thing.

When I first started working in recording studios, Peavey was most often the brand that you could often demonstrate "sterility" in an amp sound -maybe it is the components, the design, or the revolutionary manufacturing process -or maybe they were making a more on the noes or efficient amp which creates less nuance that the ear sounds pleasurable.
Click to expand...

I agree... no scientific proof here, but it does seem a freshly built amp does sound a little "sterile".

I did almost a 100% overhaul of my Marshall up back in 2003... it's now 2022 and it sounds fantastic. Granted the circuit has changed from '66 JTM45 to '68 Plexi, but it did seem a little sterile after I had replaced the stock PCB with my populated turret board, swapped out stock OT, wired everything up, etc and fired it up the first time.

Totally; there's gotta be some settling in and values drifting...


Back in the day Peavey was the tone-deaf cheap man's amp. It did one thing well though: it worked. :lol:
 
LLL said:
I agree... no scientific proof here, but it does seem a freshly built amp does sound a little "sterile".

I did almost a 100% overhaul of my Marshall up back in 2003... it's now 2022 and it sounds fantastic. Granted the circuit has changed from '66 JTM45 to '68 Plexi, but it did seem a little sterile after I had replaced the stock PCB with my populated turret board, swapped out stock OT, wired everything up, etc and fired it up the first time.

Totally; there's gotta be some settling in and values drifting...


Back in the day Peavey was the tone-deaf cheap man's amp. It did one thing well though: it worked. :lol:
Click to expand...

Peaveys are indestructable, but lacked dat mojo back in the day...

Classic 30 twin was the first amp by them where I was like "man, thats got it's own thing..."

Bass stuff was always great.
 
Some more content has been added to both my YT channel and of course to this project series. I am at Part 8 and an 8.1 is soon to follow. I also have a video on my channel on how to build a turret press.
 
We have some real lift-off! I just uploaded Part 8.1 where we build the turret board. The next video will be stuffing it with components! Since I started this series I have gained about 20 subscribers to my YT channel, which is crazy to me. In either case, stay tuned, there is more to come.
 
Well, we have entered orbit!!!! The latest video, Part 8.2 is updated in the OP and we have completed the Turret board and mounting of all the components. In the next video, we attack the chassis and start mounting off-board components! Stay Tuned
 
I have another video out that more or less just gives you an idea of options and thoughts on different parts of what makes an amp tic. Send in some more pics of your builds if you get em!

 
Just an update! I am in the middle of finishing hopefully one of the last three videos of this build series. This segment is probably the longest and most finicky part of the whole build and with work and the tedious nature of this part of the build, it is proving to be a slow process to document.

Things to look forward to in the next video:

1. Cutting and drilling of the chassis.
2. Installing of the power transformer.
3. Wiring the power transformer, power switch, pilot light, and heater wires.
4. Doing the " headphone trick " to find the optimal output transformer placement.
5. Installing the transformer and turret board.
6. Wiring the turret board

The following segment will contain final checks and powering on, as well as biasing and getting voltages!

The final segment will hopefully be a playthrough and final tweaks! Sans any issues or challenges with getting any parts to achieve my goals, we should have this series wrapped up in about 10 to 11 videos. I will post a 12th video that has the whole series collected into one, but that one may be annotated and cut short to keep it from being too long?

Anyway, just a heads up and to let you know this series isn't dead, just held up because I have been too busy with work and we are in a very particular part of the build.
 
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