Vacuum tube amplifier iphone

Sign up. Lawler Sponsored Links. In this article: 7. Previously only available in premium audio products, vacuum tubes amplifiers have been praised by audiophiles for producing more natural sounds, but these sounds were occasionally subject to distortion.

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• Tube Amp 25W Stereo Hybrid Hi-Fi Speaker Amplifier with Bluetooth - PrimeCables®
• Portable Hi-Fi Stereo Headphone Amplifier Hybrid with 6J9 Vacuum Tube
• Build a Vacuum Tube iPod Amplifier
• That Elusive Valve Amp Sound, For Not A Lot! (There Has To Be A Catch)
• Vacuum Tube, amp, amplifier, audio amplification, high power, kt88 eh, sweet, HD mobile wallpaper
• Fatman itube 202 Vacuum tube amp w/wireless ipod dock {Brand NEW!}

WATCH RELATED VIDEO: Building a Tube Amp! Does it produce better audio quality though? EB#47

Tube Amp 25W Stereo Hybrid Hi-Fi Speaker Amplifier with Bluetooth - PrimeCables®

It was with considerable interest last month that I set out to track down where in the world there are still factories making tubes. A glance at any outlet through which Chinese modules can be bought will find this type of tube in small audio amplifier projects, and some of them can be astoundingly cheap. What I received for my tenner was a press-seal bag with a PCB and a pile of components, and not much else.

No instructions, which would have been worrisome were the board not clearly marked with the value of each component. It has a volume potentiometer, two sets of phono sockets for input and output, and the slightly naff addition of a blue LED beneath each tube socket to impart a blue glow. Still just as if you were to use an RF transistor in an audio circuit it would give good account of itself, so it is with an RF tube.

Building the kit was as straightforward as any other through-hole design, and made for an enjoyable half-hour or so. There are no special things to note, I simply worked my way through it, first resistors, then diodes but not those LEDs , transistors, capacitors and finally larger parts such as the potentiometer and sockets. A visual look over showed nothing of concern, so I plugged in the tubes and applied 12 VAC. On turning the kit on I was rewarded with a soft glow from the tube heaters, and measuring the voltages I found that it was generating about plus and minus 30 volts.

How do you characterize an amplifier, or any other piece of audio gear, for that matter? There are four metrics worth knowing: the gain, frequency response, phase response, and harmonic distortion.

Frequency response relates to the range of frequencies it accepts, phase response relates to the phase shift between output and input at any given frequency, and harmonic distortion is usually expressed as a percentage of the output spectrum that is due to the non-linearities of the amplifier rather than having been present at the input.

There are specialized instruments referred to as audio analyzers that will automate all these measurements by injecting a very high-purity sine wave into the device under test and measuring its output, but they are extremely costly and beyond the budget of a Hackaday scribe. For this amplifier the frequency and phase responses are not likely to be concerning, so I would have to find a way to measure its distortion. Fortunately I was able to borrow a Keithley precision multimeter from a hackerspace friend, this very high quality instrument unexpectedly has a THD Total Harmonic Distortion function and its associated signal generator built-in.

I suspect it may be aimed at the comms industry rather than the audio business, but it gives me what I need and I am very grateful to my friend. Set up alongside my trusty Rigol z, I was ready to characterize the board. I set up the generator at the ubiquitous audio testing frequency of 1 kHz, with a mV pk-pk sine wave as input to simulate a lower-level audio source. The output at maximum volume was 4.

I calculate that as Adjusting the volume for unity gain, i. What do these figures tell me? For ten quid spent, not really. And it sounds, well, like my hi-fi system. There is one final thought with respect to this amplifier, and it returns to what I said earlier about its being described as a headphone amplifier by the vendor.

Something with an impedance in the tens of kilo-ohms is fine for it to drive, but not a typical pair of headphones with an impedance in the tens of ohms. Back in the day it might have had a step-down transformer on its output, but those are hard to find in , so an alternative might be to use a MOSFET source follower as a buffer.

Pseudo-technical explanations involving distortion in even harmonics are trotted out, and a lot of fancy tube hi-fi kit is fawned over. Nice article. The amplifier has some negative feedback from the un bypassed cathode resistor and the really nice low level linearity you are seeing is probably just the center of the transfer curve.

Impedance match with the tubes, core nonlinearity, saturation, etc. Just a thought. Drive a core into saturation and you get some nice nonlinearity, not entirely unlike the soft-limiting from the tubes that is so often cited as the cause for the desired kind of harmonic distortion. It sounds like this fun toy might be better suited to amplifying guitars, where all that distortion would be better appreciated. Not measured, but always a problem with tube circuits, is noise.

It would last longer. Probably have less crosstalk, too. If he wanted to make a lot of money doing very little work, he would sell high end audio equipment. Not the good kind mind you. This makes me wonder: Did people like this ever bother to do a proper research or do any serious testing before making such claims?

You know, using a oscilloscope, do measurements etc.. For example, a real detector crystal has a better sensitivity, linearity etc than the average diode both Silicon and Germanium. You can check this on YT.

Several videos by oldtimer confirm this. And they show you their scope in action, instead of just making claims. Over 30 years of it, some professionally, some for myself. As to tube Hi-Fi? Yes, it can sound amazing. Some FET circuits, for example, are very good. Thank you very much for your reply. With just passive components: antenna and ground, coil, detector, basic headphones where could the distortion come from? Are we supposed to be buying cheap tubes or not buying tubes at all?

Eagerly awaiting your response, I need to know how to enjoy my musical equipment. The sister tube, EF97 also works with 12v 6v heating. I just built the same kit last weekend — the first valve circuit I ever used.

The schematic is incorrect. I can see from the PCB traces that R16 does bias to ground as it should. But the other perceived attributes of warmth and harmonious-ness really have nothing to do with tube characteristics, but they do make sense with transformers if you consider dynamic bandwidth changes and second order non linearity core saturation characteristics.

Done already. There was no age limit, there were 7 yr old novice class operators. One of the things rarely mentioned is the power supply. In old equipment, there was no voltage regulator, so anode voltage would drop with large signals.

This obviously influences sound. I think that the power supply sag especially with higher resistance tube rectifiers is a lot more complicated than it looks in that screen voltage which also sags determines output tube gain as well, and voltage and current determine drive impedance to the output transformer, so my suspicion is that there is a fairly complex dynamic compression going on in guitar amplifiers that might be easily overlooked.

Just gotta squish the tops and bottoms of those sine waves somehow. Less iron pushed at same power level will get closer to saturation. Good quality tube electronics back in the day would often have a huge LC pi-network filter on the output of the rectifier, with a pair of big electrolytics and an inductor of similar size to a mains transformer.

The idea was that this circuit would help with this. Only helps with hum. BTW they would use a saturable core inductor for the choke which would change reactance based on DC current flow.

Voltage regulation is a result of the impedance of the power transformer including its effective source resistance, rectifier resistance more prevalent in tube rectifiers like a 5U4 with significant plate resistance , filter choke impedance and effective resistance.

With additional load, the power supply voltage will sag based on the sums of effective source resistances and the voltage drops thereof. Without a swinging choke, the AC ripple also changes with load. Proper selection of the choke reduces this ripple variation. Are you discussing capacitor input or choke input smoothing circuits or both. Pi network like Jenny described with 2 caps and a coil. In high voltage applications, or if you want to use lower voltage rating parts, the choke can be between the negative side of the capacitors with the last capacitor negative terminal being the connection to ground.

Proper passive power supply design is a whole lot harder than it looks and requires dynamic load analysis before you can even start. If you have a constant load, most design problems disappear. Why does the schematic have only one valve and the PCB two? Is the second valve wired in the same way and left to the imagination? So please, feel free to enlighten us. Your post is quite hollow with just that statement and nothing to back it up.

To be thorough, there is another key parameter of interest: Group Delay. Phase response is the phase delay at various frequency points. Group delay response is the rate of change first derivative of the phase delay at various frequency points. Phase response and group delay response are not the same thing have different effects depending on the complexity of the waveforms passing through a system.

If your system is has a linear phase response then phase response and group delay are the same. Group delay will give you insight about how the parts of a complex e. In music for example, consider a flute playing a single note.

In this case the group delay and phase delay characteristics will have little affect on the flute sound.

On the other hand, consider a muted trumpet playing a short staccato note. The trumpet sound will be distorted and spread throughout time and frequency, as if it is modulated by other frequencies.

This is where both the phase response and the group delay response come into play, and with complex modulated waveforms like the trumpet note example, group delay response can be dominant compared with phase response.

Think of group delay response as causing the dominant tone in the trumpet waveform to propagate at a different rate than the modulation parts of the waveform that make up the complex trumpet note waveform. In digital communications where you might use modulated analog sine waves to represent different logic levels, group delay is very important. Without good group delay response these coherent in time modulated signals will interfere with each other, a conditional formally known as ISI or inter-symbol-interference.

In a system like a telephone line that is carrying modulated digital signals between analog modems, it is not unusual to provision the telephone connections through pieces of equipment known as group delay equalizers GDEs.

Portable Hi-Fi Stereo Headphone Amplifier Hybrid with 6J9 Vacuum Tube

The iTube is a Class A single-ended fully integrated amplifier, also featuring the new FatDock, enabling the user to stream music wirelessly from dock to amplifier. One may also use a wired connection on the RCA pair on the back of the dock direct into the amplifier if preferred. Producing a powerful 20W per channel and coupled with unrivalled audio quality and the warmth brought to you by high quality thermionic valves, the iTube is an excellent option for those looking to upgrade from traditional hi-fi amps and improve their listening experience. A must-have upgrade for your ears. A must-listen amplifier — one of our best ever The careful implementation of the KT88 and 6N3 valves produce stunning dynamic music reproduction. FatDock The FatDock will work with any iPod or iPhone and will stream music wirelessl y up to a range of 15m to your iTube Amplifier or if you like, any existing hi-fi amplifier with a suitable 3.

Build a Vacuum Tube iPod Amplifier

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That Elusive Valve Amp Sound, For Not A Lot! (There Has To Be A Catch)

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Vacuum Tube, amp, amplifier, audio amplification, high power, kt88 eh, sweet, HD mobile wallpaper

Audiophile Questions. The more vacuum tubes the better the amp? I am new to the audiophile community and I was wondering if the amount of tubes on an amp matters. What does having more tubes in you amp do? Sign Up Log In.

Fatman itube 202 Vacuum tube amp w/wireless ipod dock {Brand NEW!}

We use cookies and other tracking technologies to improve your browsing experience on our site, show personalized content and targeted ads, analyze site traffic, and understand where our audiences come from. To learn more or opt-out, read our Cookie Policy. Samsung has announced two new audio docks with iPhone, iPod, iPad, and Galaxy S connectivity and three new home theater in-a-box systems. It looks like Samsung might be trying to spread things out a bit before the torrent of releases at CES next week. Today the company has announced two new audio docks and three home theater in-a-box systems. Both of the docks work with iOS and Galaxy S devices apparently at least one Samsung division is willing to support the Galaxy S , with support for flash drives, Bluetooth audio, and AirPlay as well. Samsung claims its vacuum tube setup offers "the best of both worlds," giving it the benefits of both digital and vacuum tube amplifiers. Samsung says that the system is of its own making, and is able to maintain the clarity of digital with the more natural sound of a vacuum tube.

Kt88 Se Amp. This amp is a perfect companion for any of my Horn Speakers , but can also be used with any other speakers. KT88 Push-pull Amp.

Compact stereo integrated amplifier with a MM phono stage, tone controls and a remote control with Dr iPod dock included. The SQ-N is remarkably compact and can easily be used in an office, den, bedroom… Remote Control included. In Lux produced the SQ-5A, one of the earliest stereo integrated amplifiers. The SQ-5A proved a hit because of its unique design incorporating a metre and also because of the high-quality sound it delivers. When Luxman set out to design their compact EL based vacuum tube integrated amplifier, they painstakingly researched every detail and individual component until each stage of the amplifier and preamplifier was created without compromise.

Alarm clock "the barisieur" that wakes you up with the scent of coffee. The iPhone is a camera, isn't it? Dock for people "Vintage Camera iPhone Dock". Sounds like you're riding in the wind--wooden horn iPhone speaker. Home » Living room » Lampion's tube amp for smartphones-a modern design with a rich old-fashioned sound. Lampion's tube amp for smartphones-a modern design with a rich old-fashioned sound Lampion's tube amps for smartphones are amps that have a modern design and the unique sound, expressiveness, and sound of vacuum tubes. Enuchi editorial department.

Join the mobile music revolution! AmpliTube is an essential app that lets you use your iPhone , iPad or iPod touch to process, play and record your guitar, bass or other instrument while on the go.. AmpliTube is an all-inclusive tone studio that gives you an expandable collection of ultra-realistic. See Also : Tube amps with headphone out Show details.