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Old 26th January 2004, 08:12 PM   #21
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Quote:
Hi, Can you post a part number
Lemme see... what colour you looking for?
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Old 26th January 2004, 08:19 PM   #22
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Hi audiofanatic,

Long time no speak..

Hope this helps.

http://www.builditmall.com/tubebuild...SEMICONDUCTORS

Regards,
Bas
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Old 26th January 2004, 08:20 PM   #23
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Quote:
Originally posted by analog_sa


Lemme see... what colour you looking for?

LOL

Pink? or Black, ohh no, black isn't a colour, make it yellow with blue spots!

I just can't stop laughing, LOL


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Old 26th January 2004, 08:28 PM   #24
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Default Thanks Bas!

Hi guys,

I was just, well you know what !

Bas, you'll be hearing from me within a few weeks, almost ready!

Have you ever try these Diodes?

How do they sound?


Best regards,


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Old 26th January 2004, 08:38 PM   #25
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Hi Josť,

Not many have tried em..but I have read only read positive reports

http://java.audioasylum.com/cgi/m.pl...0V&r=&session=

http://www.audioasylum.com/cgi/m.pl?...0V&r=&session=

Quote:
Bas, you'll be hearing from me within a few weeks, almost ready!
No worries mate! I still have to save up bucks to pay for em...so take your time..

Cheers,
Bas
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Old 26th January 2004, 08:45 PM   #26
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Default Agreed

Complete isolation with separate power supplies is mandatory for the best performance.
(Of course finances or price point may be an issue, but then we are talking all out performance.)

If it sounds worse, then the design and/or parts are at fault.

Cheers,
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Old 26th January 2004, 09:02 PM   #27
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Konnichiwa,

Quote:
Originally posted by analog_sa
Have you actually built or listened to such a design? Using reasonble, but not sensational iron, as shown in the Aurora's schematics, can one really expect a wide subjective bandwidth? SE type midrange magic?
Well, I am currently using something like this in my main system.... It is based around many of Lynn Olson's ideas plus some of my own. The Amp has slightly less "magic" than SE, is a bit more literal. But it allows me to get good power with the sound of 45's which is worth something to me, but maybe not to you.

Circuit is 10K:10K+10K input transformer (S&B TX896) into 5687/E182CC differential into a prototype 40K CT : 40K+40K (S&B TX101 "High Level" - not yet available) Interstage into differential 45/2A3/300B with "semi-fixed bias" into 5k5 PP Outputs, +B is 320V with 2A3 or 300B with 60mA per output.

Quote:
Originally posted by analog_sa
Interestingly the T1 uses parafeed after the first stage. Why?
No real idea, except maybe the first stage balance may not be good enough by design to not saturate the IT. My design incorporates a bias balance pot for the Driverstage to make sure the interstage transformer has balanced currents as due to the 80% Nickel core it cannot tolerate much offset, parafeed would have been the other option.

Quote:
Originally posted by analog_sa
Do you reckon the heroic effort of building one of these is really worth it or would a high-voltage high power SET be a better bet.
Given what I have heard so far from high Voltage Valve SET's (or PP Amps indeed) I'd perfer such a PP Amp, personally speaking.

Sayonara
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Old 26th January 2004, 09:03 PM   #28
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I've ordered Valve Amplifiers by Morgan Jones and the Radiotron Designers Guide so in the future I should be able to make an intelligent contribution here.

I am looking at Black Art Transformers for both output and Interstage. They are hand wound and available locally. In the future I may upgrade but they are good for now - particularly with local support.

How important is it to get really good chokes and power transformers? I would prefer to buy locally since the cost of transport is a real killer. A 10KG pack from the UK costs me 135 pounds UK. That is nearly as expensive as the parts themselves !! I can probably get all that made up here but I have no idea of the quality.

Thanks

Ralf
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Old 26th January 2004, 10:32 PM   #29
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Hi,

Quote:
A 10KG pack from the UK costs me 135 pounds UK. That is nearly as expensive as the parts themselves !! I can probably get all that made up here but I have no idea of the quality.
Ralf,

Ask someone like Brett for advice.(Hope you don't mind, Brett.)

I've exported goods all over the world, from 1 Kg to 30 Kg and never had to pay anything like that amount.

Cheers,
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Old 26th January 2004, 11:57 PM   #30
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My other option for Transfomers is to go for Tamura, Tango or Piltron. Tamura appears the most expensive option, is it the best I can get at a reasonable price. (can't believe I just said reasonable)

How is Bett able to help me ?

Regards

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