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Thread: First DIY Project - Amplifier - Initial direction sought

  1. #11
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 34,570
    I'm Geoff.

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    Quote Originally Posted by walpurgis View Post
    It take it yours is supplied with a UK spec mains transformer?
    Ignore that. I just looked at the PSU.

  2. #12
    Join Date: May 2016

    Location: Gloucestershire

    Posts: 307
    I'm Ian.

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    I'd recommend Tom Christiansen's Modulus amps. https://www.neurochrome.com/ I built the Modulus 86 as my first DIY amp project and Tom's support was first class plus there are several long threads on DIY Audio with lots of ideas etc. He also supplies a BOM for easy ordering from Mouser. Oh, the Modulus 86 also sounds fabulous!

  3. #13
    Join Date: Oct 2016

    Location: Bolton, England

    Posts: 1,142
    I'm Andrew.

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    Quote Originally Posted by ianlenco View Post
    I'd recommend Tom Christiansen's Modulus amps.
    At a first glance that looks like nothing more than an LM3886 power amp chip. However, on closer inspection it's a lot more interesting, using a precision op-amp for error correction in the power chip. It's a novel approach that I haven't come across before. It's the polar opposite approach to amp design than the one Nelson Pass adopts though. One is ultra high-tec, IC-based with lots of negative feedback for fabulous looking specs, the other is low-tec, low power, low efficiency with unashamedly poor specs, though both claim fabulous sound quality.

    Which one is "right"?
    Dunno

  4. #14
    Join Date: May 2016

    Location: Gloucestershire

    Posts: 307
    I'm Ian.

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    Well there's more than one way to skin a cat and there are an awful lot of happy builders over on DIY Audio. http://www.diyaudio.com/forums/chip-...ld-thread.html

  5. #15
    Join Date: Oct 2017

    Location: West Wales

    Posts: 43
    I'm Alan.

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    If you have little experience yet, I suggest you take one step back.

    Unless you buy a complete kit, case, parts, instructions, support etc., it is best to start with something cheap to practice on and understand before hand rather than try to go straight to your final build. If you buy wisely you can re-use many parts, psu parts, mains transformers etc. as you go along.

    As a simple cheap (usually work first time) amp choose something like an MX50 se stereo kit for 15 off ebay. Or NAP140 clone even. You only need to add a decent heat sink, PSU parts and transformer then you can even build it on a piece of plywood. When you get it working, you will be surprised how good they can sound and there is plenty on the web about building and modding them. You might not need anything better?
    As an alternative, look for a roomy old amplifier in the 'spares or repairs' or not working sections of ebay. Strip everything out except the transformer an power supply parts and install your kit boards in there. It can be a lot cheaper than buying the power supply and case parts individually.

    Then when you have a better idea what you need / want then maybe try something else.

  6. #16
    Join Date: Oct 2017

    Location: West Wales

    Posts: 43
    I'm Alan.

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    Just re-read your post #8 and realised that you have pre-ordered the Pass kit already... Interesting to see the build.

    While you wait, add the Rod Elliott site to your reading list. Once you get his style, there is so much information there. http://sound.whsites.net/index2.html

  7. #17
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,335
    I'm Alan.

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    You cant go wrong with the Avondale audio NCC 200 power amplifiers they a relatively easy build and superb sound
    Les Wolstenholm also has a new amp the NCC 220 and is finalising the NCC- 300 amp so visit his web
    site http://avondaleaudio.com/
    Where you can buy built up boards and block build an amplifier or call Les up as he sometimes sells bare circuit boards so you can build an amp from Scratch

    I use these amplifiers my self and they are excellent IMO
    Here is a monoblock Voyager amplifier I built with NCC 200 amplifier boards on the right next to left a Stereo Hackernap amplifier which was a group design and buy from the DIY part of Pinkfishmedia again the hackernap is based on the old RCA class A/B design that NAIM modified and exploited to very well over the years.
    wish you all the best of luck with your first build its very interesting and rewarding when they dont blow up

    IMG_2232 by Alan Towell, on Flickr

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

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