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LordBug

Now these are some sexy DIY speakers!

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I doubt you'll have any JAN6418's though.

 

 

Just give the kid some KT88's instead :P

I near cried one night......I had four 6550's and some EL34's.....and this dickhead had put them in a box with a dodgy bottom (I didn't know that) and they waited until I got to the tiled floor in the laundry before they fell out!

 

Lost 2 6550's and one EL34!

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awww fuck man :(

 

 

I'll get around to a nice class A design at some stage... Transistors can only take you so far...

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when researching speaker construction, i found an article where a guy made in essence a floating speaker cabnet, placed one cabnet in another with a 3gap and filled with asphalt.

 

 

edit

found the article

 

http://www.speakerbuilding.com/content/1044/

Interesting...

 

Bookmarked for later :)

 

@ Logic

Ah...fuck!

 

6550's? half a set of a matched quad?

 

Bummer :(

 

Those new issue Tungsols I got for my mates Grant amp are sounding nice, good valve for a reissue.

 

@ Rob, I have a pair of Russian 6N3's here if you want them?

Edited by datafast69

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I'm gonna grab one next time I'm at Oatley!

 

I like the tube dampeners he's got there!

oatly is a waste of time

Wes components i found to be much better.

 

Read the whole thread.........and you'll find we were talking about a particular kit...as linked by Caelum.

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It uses those miniature valves, this is something I missed :P

 

Fuck they look funny with the dampening rings on them :)

 

These 6N3's are of no use then, unless building something different, like a normal pre-amp maybe :D

 

Edit:I wonder if that thing can drive a SS power amp that has a input impedance of 22kohms?

Edited by datafast69

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Edit:I wonder if that thing can drive a SS power amp that has a input impedance of 22kohms?

The kit? Given the solid state buffer on the front end I'd be terribly surprised if it couldn't.

 

Rob.

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That kit is a bargain.

 

I'm gonna get one to try...........want one DF69?

Very tempting mate :)

 

I can't get one for another three weeks, bloody rego shafted me last week :(

 

 

 

I hate op-amps though they do have there uses in low cost stuff, but I like the Bonsai valves, Rob :D

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If you like, mate :)

 

Looks like a little bit of fun for not very much.

 

I think I have a power transformer here I can use instead of batteries.

Edited by datafast69

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Yeah I have seen how some pieces of kit like this and little DACs use batteries for lower noise from the power.

 

If I have something here already I'll try it all the same (It's just a wall-wart), maybe even compare it to batteries.

Edited by datafast69

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Also guys - the op amp they use is pretty ordinary - replace it with a better one... there are suggestions for it around on the net somewhere i think.

 

 

here:

 

http://diyaudioprojects.com/Tubes/6418-Tub...-Headphone-Kit/

 

"With the original PT2308 IC the kit is a capable headphone driver. The PT2308 has only slightly higher distortion figures than the OPA2134 but can drive more demanding loads such as 32 ohm headphones. Because I am using this build strictly as a preamp (feeding a valve power amp) the OPA2134 is a better choice. "

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I'll need to use that op-amp too, Caelum.

 

I might try some others at some stage too, something to look at and have fun with at the same time :)

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If I remember right, back in my youth they used a lot of miniature valves (along with there larger friends) in every day consumer shit like TV's and radios...

 

God I feel old :(

Edited by datafast69

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I got this valve tester off a guy in NY City whose old man used it as a 'valve jockey' fixing valve TVs.

 

It has punch cards you inset for each different valve type.

 

Very modern!

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LOL :)

 

I have on occasion seen those on ebay, awesome things :D

 

Hay I might bow out of getting one of these kits, and instead go for something that's an all valve circuit. I'm pretty sure I will be able to drive the amp I'm building directly from this DAC anyway.

 

Cheers for the thought all the same, Les, very nice of you :)

Edited by datafast69

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Thanks for the offer LP, but I ought to be right for now :)

 

The OPA2227 is a decent alternative to the 2132/2134, it's got a more "tubey" sound though which might not work so well with the actual tubey sound from a... tube.

 

TI.com offers free samples of a lot of opamps. (But of course the morality is questionable :P)

 

Rob.

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