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Old 6th November 2003, 10:49 PM   #11
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Here are a number of nice online projects with nice discussions about the circuit and project in general. The last three are not sets but worth the look nonetheless.


* Ralph Power Building your Own DIY Tube Amp: Ralph discusses how he put one of Gary Dahl’s VV30B amp together. A nice intro read on how to go about it: http://www.intergate.com/~Rpower/buildamp.htm
* Fred Nachbar’s Mini-Blok SET http://www.dogstar.dantimax.dk/tubestuf/miniblok.htm
It might not look like much but don’t judge a book…….Fred has provided lots of info and a nice explanation of the circuit. Read his article on the little PP amp at his site too.
* Jeremy Epsteins’s Free Lunch Direct Coupled 2A3. A nice SET circuit and an online reading list to help explain it. http://home.earthlink.net/~jeremyepstein/freelunch.html
*Gaby Levinson, Single Ended 12B4A Parts I and II:
http://www.enjoythemusic.com/magazin...2/levinson.htm
http://www.enjoythemusic.com/magazin...2/levinson.htm[/url]
* Derek Walton’s JE Labs 300b project. A really excellent presentation of Joseph Esmilla’s (JELabs) SE 300b. http://indigo.ie/~walton/300b.html
Deluxe Edition: http://indigo.ie/~walton/300bmk2.html
*The “Darling” SET: http://www.diyparadise.com/Darling.html http://www.geocities.com/bobdanielak/darling.html AND http://members.lycos.nl/Aren/id12.htm
* John Sherwood’s 300b Breadboard : http://www.homestead.com/sparkgap/amp.html. Nice looking breadboard! If you are starting out do not think you have to commit to a chassis right away! It just complicates things sometimes. Complete with nice pictures of the circuit layout.
* 8W SE EL34 by Claus Byrith. Very nice articles that include a lot of theory. Check out his PP at the same site too: http://www.lundahl.se/claus_b_se.html
* Gordon Rankin’s Bugle 45 (Wavelength Audio site) http://www.wavelengthaudio.com/bugle.pdf
* Wardsweb Direct Coupled 2A3: Based on the Loftin-White design by John Day (1929) http://www.wardsweb.org/audio/dc2a3.html
* Aristidis Coumpas’ parafeed 45 (ala Kurt Strain) This is at the Audio Club of Athens Site. While you are there check out the “Audio Papers” section for lots of good projects. http://aca.gr/paper31.htm
* Thorston Loesch’s Legacy 300b: Based on the Western Electric 91 (WE91): http://www.fortunecity.com/rivendell...cy/Legacy.html
* 813 Push Pull, transformer coupled. Based on Lynn Olson’s Aurora (this one isn’t so simple): http://www.izzy-wizzy.com/audio/powamp813.html
* Pete Millet’s very cool Zebrawood 829B (a conversation piece if I ever saw one!): http://www.pmillett.addr.com/829b_amplifier.htm
* Randy Carter’s Il Monstro, 845-845: http://www.cognitivEvent.com/av_monstro.html

Cheers
Craig Ryder
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Old 6th November 2003, 11:00 PM   #12
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Hi,

Thanks Craig.

You've become quite a cyberlibrarian...
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Old 7th November 2003, 06:24 AM   #13
Raj1 is offline Raj1  United Kingdom
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Hi,

Thanks for the replies once again!!


Saurav I don't think I'll need more than a few watts, my own experience has shown that maybe a watt goes a long way.......

My speakers are 90db efficient, but i may use more sensative speakers in the future if required, I don't want earth shattering volume levels, around 90db should be fine!


Ryder you've given me a welath of info there thanks......

Frank have you any info on a SE OTL?????


Thanks
Raja
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Old 7th November 2003, 10:25 AM   #14
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Hi,

Quote:
Frank have you any info on a SE OTL?????
Other than the circuits you find in headphone mini-amps, not really.

What is it you'd like to know more about and what would you like to use such an amp for?

Cheers,
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Old 7th November 2003, 10:20 PM   #15
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Everyone has been trying to help Raja. This is great and so here is my two cents worth. I think that Raja needs advice on the best tube and topology that can deliver 1W Single Ended Power. Among DHT, I would recommend 45 tube. There was an amp built by Stigla right here in this forum. If Frank or someone can post a link to this thread it would be nice. I do not know, how to do this!

I have a SE design using 45 tube. This was built two years ago and is in use with Lowther speakers…Oris Horn I believe. Very nice and dynamic. If you want the schematic just yell or buy me a lolly if we should ever meet.

My favourite SE amps are those using 6AS7/6080 and 6C41C tubes. These are commercial and so I cannot comment further. However, Raja can dig up some designs on the net and build one for himself.

Mohan
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Old 7th November 2003, 10:46 PM   #16
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Hi,

Quote:
There was an amp built by Stigla right here in this forum. If Frank or someone can post a link to this thread it would be nice.
Will do.

Quote:
I have a SE design using 45 tube. This was built two years ago and is in use with Lowther speakers…Oris Horn I believe.
Small world...
I'm no big fan of the Lowthers as is though, those cones need treatment to tame that nasty nasality.

Quote:
My favourite SE amps are those using 6AS7/6080 and 6C41C tubes.
Both are fine sounding tubes, no doubt about that, you need to drive them properly though.
I even like them better in PP but that's just my personal preference.

BTW, Mohan, did you read the OTL thread lately?

Cheers,
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Old 8th November 2003, 02:07 AM   #17
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There are some interesting Simple SE amplifier on this link

www.tubebuilder.com
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Old 8th November 2003, 03:04 AM   #18
AKSA is offline AKSA  Australia
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Raj,

My choice would be Bob Danielak's DC Darling, noted elsewhere in this thread and here: http://www.geocities.com/bobdanielak/darling.html

Bob is a superb engineer, and his design, using an 8532 and a 1626, runs off 400V, using no DC coupling caps for around 1W.

This design has been built by hundreds of triode lovers the world over, and with each iteration Bob has revisited the design to extract even more performance.

To experience the SE sound, albeit not completely DHT, I can't think of a better circuit.

Hi Mohan, nice to see you here!

Cheers,

Hugh
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Old 8th November 2003, 09:45 AM   #19
Raj1 is offline Raj1  United Kingdom
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Wow what a response!!

thanks evryone....

are the 300b designs really worth the extra expenditure?

The darling amp seems like a good start.....

But I'm a bit curious of what this 300b design could do

http://indigo.ie/~walton/300b.html

may as well do it right first time..........

thanks
Raja
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Old 8th November 2003, 10:54 AM   #20
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Quote:
Originally posted by Raj1
are the 300b designs really worth the extra expenditure?
The 300B is a hugely overrated tube IMO/IME.
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