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PostPosted: 02 Sep 2008, 02:36 
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Joined: 29 Jul 2008, 08:12
Posts: 182
Location: Wiltshire, UK
I have never built a tube amplifier, I have absolutely no knowledge whatsoever when it comes to tubes, hence the question. Can anyone recommend to me an amplifier that's tube based, ideal for the total novice? Headphones amplifier, RIAA stage or a pre-amplifier, anything that I can learn from would be fantastic. :D


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PostPosted: 02 Sep 2008, 05:15 
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Joined: 26 Aug 2008, 20:57
Posts: 415
Location: Atlanta
Didya look at the projects page? Lot's of cool things there. I would think the 6T9 or one of the kit builds might be one of the best starter kits or a preamp from bottlehead, glass-ware, or transcendent.

It would probably be wise to stick with something that has been done and is well documented and don't be a fool like me trying to do everything for yourself! ;)


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PostPosted: 02 Sep 2008, 05:24 
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Joined: 29 Jul 2008, 08:12
Posts: 182
Location: Wiltshire, UK
I spend too much time looking at the projects page, I have to wear a bib to keep the drooling under control. ;-)

A pre-amp sounds just the ticket to go with my 10W JLH that's nearing completion. :D


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PostPosted: 02 Sep 2008, 06:29 
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Joined: 04 Jun 2008, 22:27
Posts: 146
Location: Brazil
A 5687-based preamp would also be a nice first tube project. Extremely easy to build and sounds quite nice:
http://diyparadise.com/simplepreamp.html

Here are a few shots of mine:

Image
http://diyaudioprojects.com/Gallery/dis ... p?pos=-112

Image
http://diyaudioprojects.com/Gallery/dis ... p?pos=-110

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http://www.regenceaudio.com
http://valvuladosvintage.blogspot.com.br/


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PostPosted: 02 Sep 2008, 07:12 
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Joined: 28 May 2008, 21:53
Posts: 4580
Location: Winnipeg, CANADA
I have had this 6DJ8 SRPP Tube Preamplifier on my to do list for some time now. I have all the parts for it, just need some time and lack of other projects.

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[ DIY Mains AC Power Cable Cord ] - [ Gobo LM1875 Amp Kit ] - [ Tang Band D4-1 Horn Speaker Kit ] - [ Monoblock Push-Pull KT88 Tube Amp Kit ]


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PostPosted: 02 Sep 2008, 16:15 
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Joined: 02 Sep 2008, 14:34
Posts: 527
Location: Rochester, NY
I am in a similar situation to John. I want to get started on something easy, and I would like it to be useful. My Current setup is using a NAD 1700 pre amp with a NAD 2400 THX Amp. I do not use the THX this is strictly music. I thought of a couple of options instead of building an amp first. One option would be a tube based DAC for my CD changer. The other would be to build a replacement pre amp. The only sources that I hook up are kids iPOD and the CD changer.

I have also given thought to buying a used piece of equipment and doing some rehab work on it as a first step. One of our local stores has some cheap and interesting pieces. There is an Olson Golden Classic 40 Integrated Tube Amplifier for $199, or a Craftman Solitaire Integrated Tube Amplifier for $90, and finally a Knight RG 250 Tube Integrated Amplifier at $150. The store also has an Eico ST 70 Integrated Tube Amplifier but it is a big step up in price at $350.

I would love any and all thoughts

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Denon POA 2200 | Bottlehead Quickie with PJCCS | Integra CDC 3.1 | SOTA Sapphire-RG301-Grado Gold 1 | Soundwave Soliloquy Series I


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PostPosted: 02 Sep 2008, 16:45 
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Joined: 29 Jul 2008, 08:12
Posts: 182
Location: Wiltshire, UK
I used to have a NAD C370 Integrated Amplifier, sourced from a C520 CD player running TDL RTL-3 speakers. It was a lovely sounding setup but I had to sell it after I got engaged, I just didn't have the room. The only "off the shelf" HiFi I'm interested in are makes such as Naim, Krell, Chord, Audio Note etc...but I don't have long arms, and my pockets definately aren't that deep... ;-) Hence the choice to go down the DIY route, why pay £800 for an item of HiFi if you can build something that sounds as good or better for a fraction of the cost?

As you can tell, I'm very new to the DIY builds. It took a very long time to come to a decision on where to begin.

I have always wanted a valve amplifier after hearing a pair of Leak TL12s a few years ago. I also love the sound of solid state Class A. I have just built with a friend a 10W John Linsley Hood design, there is a topic within these forums on this build. A very simple circuit, sounds fantastic and is relatively cheap. I'm definately not the best person to ask for advice as a total novice to DIY builds, despite working for Allen & Heath for 4 years building mixing desks, but I can guarantee you're in the right place. There are very knowledgeable and experienced builders within these forums all of which are willing to help each other.

The only tip I can give is to look into JLH class A amplifiers, you'll be surprised just how good a little 10W Class A is. It won't shake your house to the ground or blow out any windows, but every one of those 10 watts is musically astonishing. I can't wait to get my teeth into a nice valve pre-amp to accompany my JLH power amp. I'll have the best of both worlds, solid state in class A and valves.

I loved every moment of the power amp build, I can see this being an ongoing and very expensive hobby, beats drinking and smoking any day. Already I'm thinking of upgrading the JLH amplifier with things like paper in oil caps, changing resistor types here and there to see if I can get the subjectively best out of this simple circuit.

I'm certain you'll have plenty of suggestions from the guys (and maybe girls) in these forums, I have a feeling you'll be able to build a very nice piece of HiFi for less than the restoration projects you have in mind.... :D


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PostPosted: 02 Sep 2008, 16:54 
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Joined: 04 Jun 2008, 22:27
Posts: 146
Location: Brazil
For an amp I would personnaly recommend this one:

http://www.tubesandmore.com/scripts/fox ... item=K-502

Its easy to build, cheap and sounds excellent for the price. Also, there are many mods around the web to get it to sound even better.

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http://www.regenceaudio.com
http://valvuladosvintage.blogspot.com.br/


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PostPosted: 02 Sep 2008, 16:55 
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Joined: 04 Jun 2008, 22:27
Posts: 146
Location: Brazil
Some more info (you've probably seen this but anyway...):

http://diyaudioprojects.com/Tubes/K-12M/K-12M.htm

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http://www.regenceaudio.com
http://valvuladosvintage.blogspot.com.br/


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PostPosted: 02 Sep 2008, 16:58 
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Joined: 04 Jun 2008, 22:27
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Location: Brazil
Oh, and heres a pic of mine:

Image
http://diyaudioprojects.com/Gallery/dis ... hp?pos=-84

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http://www.regenceaudio.com
http://valvuladosvintage.blogspot.com.br/


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