Photo Gallery

[rcavictim]

eehhmm
the pic..
that's what is all about

I remember seeing this beauty before. Nice work. You must have searched a very long time to find pieces of wood that would fit together just like that.

 

[greenvalve]

Re: Single Ended Single Tube DC coupled Triode

Hello all!...
Then just hooked an output transformer to it.
Sounds amazing....
Good for a little over 1 W, more then enough to drive my OB.

Very nice! Can you post a schematic for us please?

 

[rdf]

Re: L'espressivo 3.0

71a based headphone amp for Grados.

Ingenious work, I like it.

 

[head1962]

sure!

 

[jane]

KT66 (or 6550) cathode feedback design, 2x12W class A (KT66).
4dB CFB, 7-8dB gNFB.
Choke loaded LTP.

Some measurements:
o 2x KT66 + 6FQ7 + 6SR7 pr channel.
o Max Po: 2 x 13 W
o Frequency response: 10Hz - 100kHz (Low power +0/-3dB)
o Output impedance: 0.8 ohm
o THD (1dB under max Po): 0.4%
o THD (1W Po) ~0.05%

10kHz square:

Schematic:

Sounds great, swings like hell.

Jan E Veiset
Norway

 

[MrTransistorm]

@Jane: Nice. That's an interesting design with the differential choke loading.

 

[jduffy]

Re: 12AU7??? Puke!

Ricardo,

Really superb work. That looks so much like a factory built stereo component. Your attention to detail is superb..... but.... why on earth did you go with the 12AU7 tube? Those have high distortion levels. I think 6CG7 would have been a good choice. The octal 6SN7 would have been a superb choice IMO. I am sure there are many others better than the 12AU7.

You see, that's a load of crap. The tube is fine, it's the manner in which it is used where the mistakes occur. I've built several preamps now with the 12AU7 and not boutique tubes mind you and they all sound amazing.

The abuse the 12AU7 has taken is entirely unwarranted.

 

[rcavictim]

Re: Re: 12AU7??? Puke!

You see, that's a load of crap. The tube is fine, it's the manner in which it is used where the mistakes occur. I've built several preamps now with the 12AU7 and not boutique tubes mind you and they all sound amazing.

The abuse the 12AU7 has taken is entirely unwarranted.

Well gee, thanx for giving my post a four star rating!

I would never consider wasting my money on boutique tubes, or boutique capacitors, or anything else boutique.

As for you liking what you get from 12AU7's, that sounds like a very practical and low cost pleasure. If they are indeed a sleeper be glad.

 

[xazopartalos]

This is my new amplifier from the magazine elector with tubes
ecc83-ecc82 and 6as7.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

http://www.youtube.com/watch?v=s1eghXrLVtA

 

[audiomar1]

audiomar1

My system...

 

[Cal Weldon]

Very nice but where's the tubes? This is the tube photo gallery. Do you have a larger picture you could post?

 

[audiomar1]

audiomar1

My bass loudspeaker,driver CARVIN PS-15

 

[JoshK]

Love the dark wood finish!

 

[audiomar1]

audiomar1

My headphone amp. Tube 6S45P.

 

[scottswim]

Homebrew Guitar Amp 6L6 PP

I just finished this amp for a friend, don't play guitar myself, but he says it sounds great.

Will post some photos of my first tube amp later, just been making amps for less than a year and am hooked

 

[scottswim]

First amp I built, uses 2A3's

This is my first tube amp project, I made it for my son, using 6SL7 drivers, 2A3 output, and 5U4G rectifier, going by the JE Labs 2001 Version of the stereo 2A3 tube amplifier.
Scott

 

[rcavictim]

Re: First amp I built, uses 2A3's

Nice job! Your son is lucky to have you as a dad. Does he have SETable high efficiency speakers to play this through?

 

[dsavitsk]

My first real phono stage. Details of the history at http://www.diyaudio.com/forums/showthread.php?s=&threadid=130983

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[vitalstates]

there seem to have been a lot of smart and pretty amps here recently so to redress this error here is scruffy:

aikido into sv572/811

 

[rcavictim]

Nothing wrong with making a breadboard, especially if it is developmental/transitional to a polished end product. Does it sound as good as it looks?