Mono valve amplifier

Together with Stereo Exchange. The parts used on these amps, aside from chassis and main board, follow the Dynaco design principal of being readily available — most parts are available from either Mouser or most tube suppliers. There is great support out there for anything Dynaco and that includes these amps. Any place that repairs or mods Dynaco equipment can work on these amps. The front end consists of an all triode, Class A gain stage, phase splitter, and low impedance drivers. The output stage uses tubes and operates in triode or ultra-linear mode selected by a switch between the output tubes and transformers.

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Content:

• WHAT WE DO
• DIY Vacuum Tube (Valve) Amplifier Projects
• Dynatron Valve Amplificateur lf18 Mono
• Quad II monoblock valve amplifiers
• mono tube amplifier
• Valve Amplifiers
• diy mono tube amp
• Quad II-40 Mono Valve Amplifier
• Meixing MingDa valve Amplifier
• Quad QII-Eighty ( 2-80 pair ) Mono Valve Power Amplifiers

WATCH RELATED VIDEO: ECL86 SE Stereo HIFI Amplifier Build

WHAT WE DO

Building a brand new valve amplifier using the RH84 design and off-the-shelf components. A number of recent visitors have registered surprise that we do not have any music playing in our workshop. We do have a small radio, but it seldom gets turned on.

I reckoned it was about time to put that right. Valves were largely superseded by solid-state systems from the mids onwards, but have made a real comeback in the past decade or so — particularly amongst audiophiles — as people realise they produce a warmer sound, as well as having great visual appeal. These days any kind of valve amp attracts a premium price and I thought that building one for myself, daunting prospect though it was, would be a relatively economical route to take.

After doing some research it seemed the perfect beginner's project was the RH84 single-ended amplifier. At the time I designed it I was practically penniless There are also two transformers for the power supply: one 6. In addition there will be a bridge rectifier and smoothing components in the power supply, and this will be covered in a future post.

Where he seemed lacking in information was in the use of a toroidal transformer, which is what I had, although on reading up about them it would seem they have a very low or negligible stray field.

I imported the images for the transformers and valve bases from PDF data sheets into Inkscape, drew some of the other components and experimented with different arrangements until I was happy.

I then shared my design with Alex Kitic via email, and he seemed to think the layout was OK, which was good news. I was now happy that I had a viable design at least for the audio stage of the amplifier.

We would be using a pair of bench power supplies for testing, so the power supply could come later. Having used the Fostex FE83En full range drivers in my project to build a Portable 12V Sound System we knew they performed well with relatively small amplifiers and so decided to use them again. The one disadvantage with this coating is that it only seems to be available in black, red or white unless you are prepared to wait for weeks.

We got in touch with our Goth side and went for the black. Given our previous experience and the fact that these were passive speakers and therefore a lot simpler, these would be comparatively simple to put together. As is often the case with these blog posts I have embarked upon something completely new to me and somewhat out of my comfort zone. It is going well so far, but there is some way to go yet. In future posts, I will be sharing the building of the prototype single amplifier, followed by the final version with two of these and a power supply.

Finally, fitting this all into an attractive enclosure, with cabling and connectors etc. WARNING: The circuit designs are shown here for informational purposes only, this is not a tutorial and the designs are not warranted to be safe. Dangerous voltages are involved and you should not work on such designs unless competent and safe to do so! I make it that for a mono amplifier, 3 transformers are require as you are using a seperate ones for the heaters and the HT supply.

A stereo amplifier would therefore require 4 transformers. Not quite the 2 that the parts list stated. Zonko That's correct. R7 27k and R6 k. I schematick is shown R7 27 and R6 Which one is correct? Dear sir , thank you for your nice project you are sharing with us. I have a question. Can we skip the supply tranformer and use only the fillament one and the output two? Anyway we are using the same voltage with the socket. I am seriously thinking of building this valve amplifier.

Are there any important facts i need to know before i order the spares? How do you get the v dc with this 2x v transformer? The circuit asks for a 2x v trtansformer. Jdev99 volts 2 x v is the RMS voltage on the transformer. Bonzadog the stereo version is on the bench waiting to be tested. Watch this space! Hi Dave, I'm a bit confused about how you would build the power transformer with the two transformers you list.

The seems to be a isolating transformer and can't provided you with the VV. Hi Dave, Awesome project. Even more awesome is that these parts are available from RS. A couple of things to note about the toroid HT transformer: 1. Mains type toroids can have a primary to secondary coupling up to 20 to 30 KHz, so are effectively full audio bandwidth for any noise coming in on the mains supply. This is compared to a standard EI laminate transformer which has the primary and secondaries in separate sections on the bobbin - coupling there should be 1 KHz at best worst?

Toroids can also produce an audible hum if the mains sine wave is distorted, e;g; by computer switch mode power supplies. By comparison the EI lamination layup gives a nominal gap so the transformer is less susceptible to small amounts of DC in the supply.

I would suggest a delayed relay and or other timer for a few seconds turn on. A mechanical relay with snubbing across the contacts gives a nice satisfying clunk : Single ended amplifiers need well smoothed HT supplies, otherwise the ripple will modulate the signal. Hope this helps. Best, Sue. Sue Interesting information on toroids, I was not aware of these characteristics - thanks for sharing. All the part number links above result in a server error. The part numbers are RS component part numbers.

I had to look these up on rs-online. I'm following this project. Looks fun. Hi Dave, This looks like a great project, do you have any idea of what the finished project might cost? Dave Ives 18 Feb The RH84 After doing some research it seemed the perfect beginner's project was the RH84 single-ended amplifier. Speakers Having used the Fostex FE83En full range drivers in my project to build a Portable 12V Sound System we knew they performed well with relatively small amplifiers and so decided to use them again.

Next steps As is often the case with these blog posts I have embarked upon something completely new to me and somewhat out of my comfort zone. Share this post. Like Follow article. Dave Ives Follow. I currently look after production at AB Open. I have a background in the arts, environmental conservation and IT support. In my spare time I do a bit of DJing and I like making things.

Comments Add a comment Zonko. August 2, Upvote 0 Votes. Andrew Back. April 5, March 28, March 3, September 11, June 25, Dave Ives. June 27, April 17, March 18, March 1, Upvote 1 Votes Downvotes. April 2, March 4, February 26, DesignSpark Electrical Logo linkedin.

DIY Vacuum Tube (Valve) Amplifier Projects

The Mei Xing Factory was established in , it is a manufacturer specially producing valve amplifier products in China. This combination of design, materials and skill enables Meixing to manufacture output transformers with the highest sonic qualities and power transformers that are very efficient and reliable, with low noise. And has relevant certification. Privacy Notice. Shopping Cart: Your cart is empty.

Dynatron Valve Amplificateur lf18 Mono

I have a few music tracks that are my go-to tunes when evaluating stereo systems. I know them intimately and can spot playback distinctions like an owl catching a flicker of movement from a mouse buried under 10 inches of snow. Plus, I never tire of them, and when I listen I focus on the delivery, not my fickle reactions to the music itself. Auditioning the Monoprice Stereo Hybrid Tube Amp via such perennial favorites presented a special challenge. The shelf system is a watt tube amp system that also has Bluetooth, so you can feed it from your smartphone or tablet. That makes it a hybrid system, using a solid-state power amplifier but a tube pre-amp. The only option in critical thought is to go with your gut, and the only way to find out is to fire up those tubes. I did so in my den, a smallish room with wooden walls — about the perfect size for shelf systems.

Quad II monoblock valve amplifiers

The Pure Triode Tube. A powerful alternative to the B. With several pairs sold to leading reviewers, we are told that one of their outstanding qualities is the ability to give consistent results with virtually any type of speaker. Like all our amplifiers the design is simple letting the magic of the valves shine through.

mono tube amplifier

Non-commercial use only. RedRoo amplifier kitsets are no-compromise valve designs for electronics enthusiasts, audiophiles, and 'makers'. RedRoo uses top quality components with unusually large output transformers for extended frequency response. They sound terrific, don't cost an arm and a leg compared to similar pre-built amplifiers, and should last you a lifetime. No matter if you're a beginner or an experienced audiophile, RedRoo amplifier kits will impress you and your friends.

Valve Amplifiers

Sinbosen watt mono amplifier board K amplified outdoor high quality tube amplifier. Sinbosen power amplifier price wats 4 channels digital amp D vacuum tube audio amplifier. Best quality tube mono block power amplifier professional power amplifier free shipping. New design tube hifi audio home mono amplifier board amplifiers with great price. In the selection of components, the use of the never stingy, but not extravagant waste, choose the right, just right, to improve the price of the board. With: the power amplifier board can be used directly when the power amplifier can only be connected to the transformer can also be used with the tone board, or with low-pass board made of subwoofer board, cost is very high.

diy mono tube amp

Free UK Delivery. Available with Online Finance and Free Delivery. The Quad II Eighty is much more than a homage to the Peter Walker classic - it's a complete re-interpretaion of the philosophy.

Quad II-40 Mono Valve Amplifier

The Mei Xing Factory was established in , it is a manufacturer specially producing valve amplifier products in China. This combination of design, materials and skill enables Meixing to manufacture output transformers with the highest sonic qualities and power transformers that are very efficient and reliable, with low noise. And has relevant certification. Privacy Notice. Shopping Cart: Your cart is empty.

Meixing MingDa valve Amplifier

What Hi-Fi? Mark Levinson No. UK What Hi-Fi? Doshi Audio Monoblock V3. US What Hi-Fi? Free Shipping.

Quad QII-Eighty ( 2-80 pair ) Mono Valve Power Amplifiers

If you don't have an account, you can create it here. If you have forgotten your password, click here. The Model Mk2 is Zanden's flagship power amplifier. The Model Mk2 employs KR vacuum tubes and as a result, it succeeds in securing both high power and tonal quality that has been difficult to achieve with vacuum tube amplifiers.