Ax84 amp negative

Build your own tube amp? If I wanted to design and build my own tube amp, what books would I want to be reading? Are there any decent web sources? Also, what about for solid-state? Depending on your electronics background, it might be best to start with one of these proven designs.

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Content:

• Paul Ruby Amplifiers
• Valve amplifier
• Tube guitar amp help needed
• Tube Guitar Amp #1 (2012)
• Welcome To the Hoffman Amplifiers Forum
• audio-talk
• Tube DIY Asylum
• trinityamps.com

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Paul Ruby Amplifiers

Welcome, Guest. Please login or register. Did you miss your activation email? Home Help Login Register. Some questions. Pages: [ 1 ] Go Down. Author Topic: Self Split output stages in tube amps. Read times. Posts: Total likes: Virtue signalling keyboard warrior since I've become interested in self split largely due to Doug H 's Firefly, which I've modified for subminis with my Superfly.

I've also be PM'ing back and forth with kurtlives about other possiblities using self split output stages. So a couple of questions: - parallel self split: possible? But how would the 'lower' tubes' grid 2 be configured? A mirror image of the top tube? And what about negative grid 1 biasing - presumably not possible with the lower tube as grid 1 is tied to ground?

Posts: Total likes: Ian M. I've been reading up on this quite a bit because I'm just about to start ordering stuff to build a Firefly. Don't know about the pentode stuff. Thanks for the links Ian, a lot of good stuff there, particularly this from Merlin, which I will be trying: "The slave triode of the 12AU7 V3b has to get all its drive voltage across the shared cathode resistor R Because this is only ohms, that basically means almost no drive at all- that slave triode is just sitting there doing almost nothing.

Instead of directly grounding the grid of V3b, add a grid leak k or more will do and connect the cathode of V2b to the grid of V3b via a 22nF coupling cap. This allows V2b to act as a crude cathodyne splitter and will roughly double the drive to that extra triode. Quote from: frequencycentral on August 12, , PM. Posts: Total likes: 1. Hey Rick, speaking of different output configurations have you looked into output transformerless designs at all? A few weeks ago I was working on figuring out some kind of work a like for the Tubes that are normally used in output transformerless designs.

I didn't get very far with research on the OTL designs though as I couldn't find much information bout them. Have you thought about them or know anything about them? Never really looked into them, but have come across the term when browsing. I kind of feel that an output transformer is an essential part of the 'sound' of a tube amp.

But I'd be fascinated to see your project come to fruition. They do tend to require a higher impedance speaker but my thought was that if you use 8 ohm speakers and made a stack with them, say 4 8 ohm speakers in series gives you 32 ohms.

I saw many OTL designs that were targeting 32 Ohms for headphone usage. Also I just got a message from one of my professors that he was wondering if I wanted some old Tube books and texts.

Apparently one of the other professors is throwing them away. Posts: Total likes: 0. These speakers were discontinued and are now are hard to find. I recently saw an EL86 amp push-pull, 14 watts in which an output transformer was added in order to be able to use 8 Ohm speakers I remember having read somewhere that self split configurations are only feasible for low power amps, which might explain why you won't see this very more often.

I''l let you know if I rediscover this source and find any information of interest. Taylor Awesome! Posts: Total likes: 71 The clean energy source of the future. Don't know if this is really any help to you guys, but along the lines of OTL amps, this guy's stuff is nuts. Quote from: frequencycentral on August 13, , PM. DougH Awesome! Posts: Total likes: There was another type of self-split discussed at ax84 at one time involving using the screen to pass signal to the other tube.

I don't remember the details now. Posts: Total likes: 1 Chris M. So Doug the self split with pentodes never really went anywhere? My DIY site: www. Johan Awesome! Posts: Total likes: 10 Johan Blomdahl. Quote from: kurtlives on August 14, , AM. Pages: [ 1 ] Go Up.

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Valve amplifier

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Tube guitar amp help needed

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Tube Guitar Amp #1 (2012)

As of April 18 , my first D. I made a huge mess and a lot of mistakes with it but it came out fairly well for a first try, and was definitely worth the time and expense because I learned quite a bit. This schematic is incomplete and has some mistakes in it — the tonestack is not represented and the filament supply of the Hammond FX power transformer should marked 5 Amps, not 3 Amps. See below for why the tonestack is left out. If you want to see tonestack schematics you can probably bring up of them in Google in about 20 seconds.

Welcome To the Hoffman Amplifiers Forum

Post by KimSeiji » Thu Mar 01, pm. Post by Paul Barker » Thu Mar 01, pm. Post by KimSeiji » Fri Mar 02, pm. Post by Paul Barker » Fri Mar 02, pm. Post by Mike H » Fri Mar 02, pm. Post by Mike H » Sat Mar 03, pm.

audio-talk

Moderators: coco , lbethune. Users browsing this forum: Google [Bot] and 0 guests. Posted: Fri Jun 05, pm. Hallo, since I built the amp I have made several modifications, tested, changed back a few ones that were not good Today I thought I would investigate why the precense control almost was non functional on the amp.

Tube DIY Asylum

I became interested in building a tube amp in the spring semester of my sophomore year at UConn. I had been dismayed at the sound of many commercially available amps and I wanted to see if it was possible to craft my own amp to my own specifications. Of course I knew that I could not simply build a complicated high gain channel switching amplifier right off the bat so I decided to start small. I did some searching on the internet and came across one of the best sites to being learning about building an amplifier, AX

trinityamps.com

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By Ralph Stephens , April 20, in Amps. I'm thinking about it too, but there doesn't seem to be any kits out there for the P1ex, which is what I wanna start with. I'm pricing it out right now, trying to figure out if it's cheaper to buy from a dedicated "amp" parts place like tubesandmore. When I poked around, they were in the same price range. Not to mention then I wouldn't have to run all over and spend the time finding and getting the right parts.

Tried this mod and it worked great! Totally removed any trace of the harsh jagged edge to the high end That weird glassy jangle on top of the note that I couldn't stand. Sounds amazing now! Btw, I have the 20hv.

I have never been much of a fan of single ended amps. I started modding amps with a Valve Junior and no matter what I did to it it always sounded pretty bad. I had never done a big bottle single ended amp because that seemed to make no sense. However, after building a ton of smallish push pull amps and despite all my misgivings I decided to try a big bottle single ended amp anyway.