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Old 7th December 2008, 06:50 AM   #1
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Default Hello

Hello folks...

I am new here and thought I should introduce myself. I have been a electronics hobbyist for some years now and am currently enrolled in a university. I have been finding myself lurking here, browsing through various amplifier schematics on this site trying to decipher them and understand how they work and I realised that I could learn a lot from you guys and hence finally decided to de-lurk...

Do you guys have any recommendations on any good tutorials or books on amplifier design? My eventual goal is to design a ultra-low THD amp entirely from scratch - just as a challenge to my design skills.
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Old 7th December 2008, 02:34 PM   #2
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tube or solid state?

welcome to DIY
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Old 7th December 2008, 05:06 PM   #3
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Hello and welcome to the forums.
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Old 8th December 2008, 04:58 PM   #4
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Quote:
Originally posted by zigzagflux
tube or solid state?

welcome to DIY
I am kind of clueless with tubes - I am familiar with some of the general principles of operation of the triode and the pentode, but cannot visualise any curves and cannot 'see' things enough to design anything, so I am assuming that the first amp that I design will happen to be a solid state one. Of course, I would like to learn about tubes as well. I have built a tube amp before, but I was too young then and was still in the phase where the enthusiasm of building sort of overshadowed that of designing.
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Old 10th December 2008, 04:09 PM   #5
49 - for the 18th time - again!
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Hi kleinbottle - and Welcome to diyAudio!

Lot's of things to learn and study - here is a good place to start (now that the site is back online) ---- http://www.bcae1.com/
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Old 13th December 2008, 06:42 PM   #6
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Thanks!
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Old 13th December 2008, 08:38 PM   #7
49 - for the 18th time - again!
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Quote:
Originally posted by kleinbottle
Thanks!
UR Welcome! BTW - don't get to fixated on building an amp with ultra-low THD. Such amps are around - and some people will swear by them and others will swear at them - it's a matter of personal listening taste - which is acquired and refined over time. Some people prefer tube amplifiers that sound "warm" - only to discover that these amps are running as high as 3% THD. To some amps that have very low THD sound "sterile" or "cold" - but again, it's a matter of taste. Other things will also enter into the reproduction chain - your source material - preamp - amp - cables and interconnects - speakers - and - SPEAKERS.

Here is a good link for you. Study this guy very closely and he will save you about 30 years of time and thousands of $$$$ worth of false starts! http://www.lampizator.eu/AMPLIFIERS/AMPS.html

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Old 18th December 2008, 03:09 PM   #8
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I just finished the stuff on http://www.bcae1.com/. I think I am pretty comfortable with it.

While building a 'warm-sounding' amp would be great, a reason for the low THD goal was that while 'warm-sounding ' is kind of a subjective thing, the THD metric is well defined and for a design challenge exercise, I feel it would be a helpful metric.

Another reason to build multiple amplifiers: some with the goal of sounding warm, some with the goal of having super low THD!
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Old 18th December 2008, 06:22 PM   #9
49 - for the 18th time - again!
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Hi kb

Well -as I said - it's purely a matter of personal taste. Building a amp with ultra low THD is a great place to start out in this little hobby. Constructing such an amplifier will build your confidence as well as provide you with a benchmark with which to compare other amps to.

You will discover that there are other things that get into the mix of things
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