I've just aquired a pair of boards and components to buid a Paradise phono stage, it will be 3 boxes and have a dual mono psu. Looks like I'll be buying more transistors plus and be spending lots of time matching. What meter would I need to measure this? Congratulations on acquiring the finest phonostage I have heard.

I'm not sure how you managed to miss the whole transistor matching issue though as there is a massive Paradise thread on the DIY Audio forum from whence it camea large thread in the DIY room of the pfm forum and a large thread on my own forum.

I use a Peak Electronics tester but don't know whether it would be accurate enough for your purpose. I'm pretty sure that's what a friend used to build his, mine and a number of others - I'll check with him though. What I do know is that you have to be careful about the temperature when measuring them though - even holding them in your fingers warms them up enough to significantly alter the measured value.

Yes temperature can affect measurements depending on the type of semiconductor. I didn't miss it Mark, the kit I bought included of each type and my reading suggests buying much larger quantities to match from.

I was hinting that I'm not looking forward to this part of the build that's all. I just worded the OP badly, it reads as if I didn't realise and it was meant to read I didn't realise when Vlad first suggested it. I'll probably see him tonight - I'll ask. Worth contacting him though as he may have spare components.

I should add that it is worth persevering with this build as it really does sound outstandingly good. I decided not to go ahead with the build and sold the kit on. I have bought an unwanted group buy for the Paradise off a German owner. It's quite a project. The seller told me they are closely matched. I have the Pearl 2 currently which is good.

I think the Paradise is possibly one the best performing phono amplifiers that you can build if it's assembled correctly.

All kits and transistors in stock and ready to ship.

Although the design is quite forgiving of mismatch, the best performance comes from closely matched gain in particular circuit locations. You can post now and register later. If you have an account, sign in now to post with your account. Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor.

Upload or insert images from URL. DIY Search In. Recommended Posts. Posted May 28, What is the best DIY phono preamp projectY. I would like to make a phono preamp. I did electronics at school up to 16 years old. That's it though. So, I can use a soldering iron!

Anyhow, I am wanting to make a good phono preamp, as my amp has no phono input. I expect to be using MM cartridge. Is that a fair wish? And I would like it to be not too hard to make! I am not an expert at this, though, I am careful with my hands. So, does anyone know how I can do this?

Is there a project I can buy, or online instructions I can follow or something? Which do you recommend? Plus, I am in Japan, so, if you have any special thoughts about that too, such as shoud I buy parts here, or get them sent from the States or somewhere? Thank you very much Justin. You can use 1 high quality op-amp with very good result, but most circuits use 2 op-amps and sometimes even per channel. Phono like Microphone amplifiers, with their fairly high gain, are sensitive to power supply quality - ripple, hum and noise, so there are a number of projects using BATTERY Supply.

diy hifi phono preamp

But most use of course Mains Transformer Voltage Supply but with very good filtered and regulated voltage. I have two projects, one of them is totally discrete with a massive amount of parts and the second one is insprired from the LT datasheet. Find More Posts by peranders. Thanks very much for the reply! But, are there any specific projects you recommend?While most of the projects are very simple, they are typically operating in Class-A mode and will require a very robust and clean power supply for good hi-fi audio results.

Last update: 19 September The DIY solid state projects are listed in chronological order. For other types of projects, use the navigation on the left. The following DIY solid state hi-fi audio projects have been superseded by a more up to date project page.

Last update 19 September The builder will need to provide a VDC power supply, an enclosure and miscellaneous hardware like connectors and switches. Mark uses 9V batteries for the power supply and is very pleased with the results.

DIY Hi-Fi Phono Projects - Turntables, RIAA Preamps

The builder will need to provide a 24VDC power supply, a chassis and miscellaneous hardware like connectors and switches. Mark reports that this is his best phono preamp so far!

An additional gain stage is available to accomodate MC phono cartridges. This is a simple circuit that sounds real good. Be sure to use matched transistors. The new version allows novice builders to experience assembling and listening to their own headamp.

Mark's fascinating exploration of phono preamp design

The project includes PCB image files and can also be built on a protoboard. Dan used the original driver transistors, but due to the unavailability of the original power transistors, Toshiba 2SA and 2SC transistors are used.

The transistor change allows for an increase in the rail voltage which results in more power 58W measured. Dan reports that Jean Hiraga's deceptively simple and pure Class-A circuit topology delivers great sonic results.

The circuit topology is a single-ended Class-A amplifier stage with an active load. The sonic results are surprisingly good for such a simple design.

DIY Hi-Fi Phono Projects - Turntables, RIAA Preamps

However, he did make some changes to the power supply. Instead of a battery, Dan uses a regulated power supply. Power output is very low, just a few Watts, but the sound is incredible.DIY phonograph projects for listening to your vinyl LP records. Questions and discussion about vinyl LP records, hi-fi turntables and phono preamplifiers is welcome in our DIY audio forum.

Last update 19 September The builder will need to provide a VDC power supply, an enclosure and miscellaneous hardware like connectors and switches. Mark uses 9V batteries for the power supply and is very pleased with the results.

Bruce reports that this is a "surprisingly nice sounding preamplifier". The DIY turntable project uses the platter and the direct drive motor assembly and controls from a Dual record player. The tonearm is built from scratch following a magnetically Stabilized design which means that there are no fixed pivot points or bearings.

The turntable plinth is made using stacked layers of plywood. Gain is 45 dB, sufficient for use with a high output MC phono cartridge. The preamp uses solid state HT power supply and DC for the heaters. The builder will need to provide a 24VDC power supply, a chassis and miscellaneous hardware like connectors and switches.

Mark reports that this is his best phono preamp so far! An additional gain stage is available to accommodate MC phono cartridges. This is a simple circuit that sounds real good. Be sure to use matched transistors. The kit comes complete with everything you need except for an enclosure and a power supply AC walwart. Mark reports that the kit is dead quiet, performs well and holds it's own against a popular commercial phono preamplifier.

Try this kit with premium quality opamps.If the ohm resistors are not available from your supplier, use 2 x 1k5 resistors in parallel. Alternatively, you can use the originally specified 82nF cap with a ohm resistor.

The worst case error with any of these networks is less than 0. The original network was used before E24 resistor values became commonplace ohms is an E12 value, which used to be all one could get easily. RIAA equalisation is the standard for vinyl disks. It's been in use for a long time some time aroundand was 'tinkered' with by the IEC to tame the bottom end.

The 'amendment' by the IEC was apparently withdrawn in IMO it never worked, and never sounded right. Many active EQ stages can't continue the rolloff much beyond 25kHz or so, because the gain of the amplifier stage can never be less than unity.

A few use fully passive EQ in the belief that it somehow sounds 'better', but the stage featured here uses a combination of active and passive, in separate networks. The design was used by me long before the Internet, and the version shown with a few minor updates along the way was first published on the ESP website in Most RIAA equalised phono stages have an additional and undesirable zero at some frequency above 20kHz. This extra zero is avoided in the design described, because the circuit uses a passive low pass filter that continues to roll off the high frequency response above 20kHz, with the final rolloff limit somewhere well beyond 10MHz depending on the capacitor's self inductance.

The terms 'pole' and 'zero' need some in this case simplistic explanation. If a zero is introduced after a pole as shown abovethe effect is to stop the rolloff - back to flat response.

diy hifi phono preamp

The flat response is seen between Hz and 2,Hz. The next pole 2,Hz causes the signal to roll off again. The 'indeterminate' zero above 20kHz is caused because many preamps cannot reduce their gain below some fixed value determined by the circuit although the effect is often seen well before the gain falls that far. Not all have this issue, and it's not present in P As noted further below and elsewhere on the ESP website, striving for 'perfect' accuracy is pointless, as so much depends on the pickup cartridge itself, the tone arm, and of course the recording.

diy hifi phono preamp

When you purchase vinyl, no-one tells you what EQ was applied during the mastering and cutting processes, the high frequency response degrades after the disc has been played many times, so ultimately you have to let your ears be the final judge of what sounds right to you.A phono preamp aka phono stage raises your turntable's output to make it compatible with modern amps.

At the same time, it adds standardised equalisation. So why do you need one? Your turntable either doesn't have one, in which case you won't be able to play records without one. Or maybe you just want to upgrade its sound beyond what's possible with the built-in preamp.

As with many product categories, models span all kinds of price ranges. But whether you're looking to pinch pennies or break the bank, we've got a phono preamp for you: we've drawn on our extensive reviews back catalogue to pick the best around right now, so you can be sure that you're buying quality.

The Rega Fono MM MK2 was one of the finest phono stages available, so to say expectations were high for its successor is a bit of an understatement. Thankfully, it meets them and then some. The design has been fine-tuned within an inch of its life, making for a much sleeker product that retains the winning simplicity of its predecessor. The Award-winning sound of the MK2 now has a greater dynamic range and greater clarity, making an already fantastic performance even better.

The best sound-for-pound phono preamp around. With moving magnet and moving coil compatibility, a headphone amp and corking performance, this is a solid effort. Well this is certainly a looker. With an offset volume dial, minimalist styling and mirrored rear labelling that's easy to read even if you're peering over the top of the unit, it's clear a lot of thought has gone into this device. And no less attention has been paid to the audio quality.

diy hifi phono preamp

The presentation is very good indeed, being spacious and cohesive, while the sound is dynamic and the timing spot-on. It doesn't quite match the Rega Fono MM MK2, but it certainly holds its own, which makes it certainly worthy of consideration. Sure, it's small and fairly basic looking, but every effort has been made on the innards: they give sufficient body to a song's vocals without overloading it with bass. It has a great sense of timing, too.

One of the best budget phono preamps around. Tracks are served up with lashings of zest and enthusiasm, along with a side serving of musicality and dynamics. And because it has a USB out, you can also use it to digitise your vinyl collection. Another oldie but still a goodie, the Gram Amp 2 holds its own a full five years after first coming on the scene. And you can see why - simplicity is the name of the game here, an approach that ages remarkably well.

It's a moving-magnet phono stage with one set of inputs, one output, no bells or whistles. Sound quality is first rate: fantastically detailed, with the upper register particularly impressive.

There's also an optional PSU1 linear audio upgrade, a 24V DC brick that evens out the variations from a household power supply. It will cost you a bit more, but if you want to elevate this already excellent budget model then it's worth it. With its smart, understated looks, you can tell this will impress before you even plug it in. And once you do you won't be disappointed: it handles both moving magnet and moving coil cartridges, and even comes with a handy tool for adjusting the settings.

The sound is superlative, packing plenty of power, with generous scale and pleasing stability. Add in a smooth and refined tonal balance, and you've got quite a package on your hands. Hurry though, as Arcam has just discontinued the rPhono and it's getting hard to find. Read the full review: Arcam rPhono.Skip to main content.

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