Photo Gallery - Page 110

rwellerson · 11th June 2006, 02:10 PM

Quote:

Originally posted by Mr. Triatic
->rwellerson
..Stunning!!
Which transformers are you using?

Hi. Mr T

Thanks for the "stunning"....
As I said just above the trafos are done under my specs and by a very good guy in this art.
All of them oversized for their jobs.
For ex.: the output ones we're done to stand 100WRMS each in this 60WRMS per channel amp.
Believe me: bass is way much better (not more bass but lower and lower bass...)

[ ]
Ricardo

jane · 12th June 2006, 12:46 PM

MiniPP, EL84 power amp.

Distortion figures are quite good: less than 50dB (mainly 3rd harmonic -- higher order harmonic less than 70dB) at 5V rms output into 8-ohm resistive load. Onset of clipping is about 7V rms.

Feedback mix: Local shunt feedback: ~8dB, loop feedback ~10dB.
Zo is less than 1 ohm.

Some tweaking/testing with different feedback fractions, idle current etc are still to be done.

Latest schematic:

Jan E Veiset
NO-6600

SY · 12th June 2006, 01:11 PM

The 12AT7 is a great choice there (that's what I use in my EL84 amp). High mu, excellent linearity at the 10-15V swings needed for that circuit.

arnoldc · 12th June 2006, 11:36 PM

My little preamp

Front:

Back:

Porn:

The little one can take WE407/396, 2C51, 5760 tubes.

Zen Mod · 12th June 2006, 11:40 PM

Quote:

Originally posted by arnoldc
My little preamp

ugly!

arnoldc · 12th June 2006, 11:56 PM

Thanks for the compliment choky

ddd · 13th June 2006, 06:47 AM

arnoldc, it's a matter of style. The wood is not a must in every design. I think this is a sample of nice and clever constraction!!!
choky is obviously a fan of the kitsch. Sorry, choky.

i_should_coco · 13th June 2006, 11:53 AM

Shishido style IITC 801A amp. PSU is a separate chassis.

Zen Mod · 13th June 2006, 12:05 PM

Quote:

Originally posted by ddd
....... The wood is not a must in every design. .......

it isn't?
how?

http://choky.on.neobee.net/images/Choky's%20WOT.jpg

now-that is not ugly....it's a mess

ddd · 13th June 2006, 04:19 PM

Quote:

Originally posted by choky

it isn't?
how?

http://choky.on.neobee.net/images/Choky's%20WOT.jpg

now-that is not ugly....it's a mess

Your preamp is nice, choky, but as standard as the others in that style. I could describe arnoldc's design as brave and out of temporary fashion. That's why I liked it.

12th June 2006, 12:46 PM	#1092
jane diyAudio Member Join Date: Jul 2004 Location: Norway	MiniPP, EL84 power amp MiniPP, EL84 power amp. Distortion figures are quite good: less than 50dB (mainly 3rd harmonic -- higher order harmonic less than 70dB) at 5V rms output into 8-ohm resistive load. Onset of clipping is about 7V rms. Feedback mix: Local shunt feedback: ~8dB, loop feedback ~10dB. Zo is less than 1 ohm. Some tweaking/testing with different feedback fractions, idle current etc are still to be done. Latest schematic: Jan E Veiset NO-6600 __________________ Life is hard - Then you die.

12th June 2006, 01:11 PM	#1093
SY diyAudio Moderator Join Date: Oct 2002 Location: Chicagoland Blog Entries: 1	The 12AT7 is a great choice there (that's what I use in my EL84 amp). High mu, excellent linearity at the 10-15V swings needed for that circuit. __________________ If there's a sucker born every minute, where do the rest of them come from?

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12th June 2006, 11:36 PM	#1094
arnoldc diyAudio Member Join Date: Apr 2003 Location: Makati	My little preamp Front: Back: Porn: The little one can take WE407/396, 2C51, 5760 tubes.

12th June 2006, 11:56 PM	#1096
arnoldc diyAudio Member Join Date: Apr 2003 Location: Makati	Thanks for the compliment choky

13th June 2006, 06:47 AM	#1097
ddd diyAudio Member Join Date: Oct 2005 Location: Sofia	arnoldc, it's a matter of style. The wood is not a must in every design. I think this is a sample of nice and clever constraction!!! choky is obviously a fan of the kitsch. Sorry, choky.