Simple Symetrical Amplifier - Page 213

Lazy Cat · 12:41 PM

Bravo sonnya

Plot represent mains AC current waveform as voltage drop on 1,00 ohm resistor (1 V on plot equals 1 A) as function of NTC soft-start circuit power-on sequence. After 0,68 s delay, relay contacts shorts the NTC and there's still 3 A current peak to fully charge elco bank of both (stereo) SSA channels.

Here's plot with values.

P.S. Serial NTC is CL-90 from GE. First power-on relay switch is dealing with some 2 Ap and second delay-on relay switch with some 3 Ap which is quite optimal for turning on two 400 VA toroidial transformers and some 90.000 uF of all elcos in power supply.

apassgear · 19th March 2012, 03:14 PM

you are all wrong...

from my perspective that's a tsunami striking the beach

cheers

Lazy Cat · 09:43 PM

Before

Lazy Cat · 19th March 2012, 09:45 PM

After

sonnya · 19th March 2012, 09:52 PM

Funny, that you posted pics. I was just gonna write how the project went for you.

Lazy Cat · 10:22 PM

Yeah cool thinking

Well listening tests with simultaneous measuring check-ups is what's happening. SSA has now something like 20 hours of music burn-in time and I admit that now in stereo setup this is one of the greatest amp I ever experienced. Resolution and transparency is spooky, still presented in organic full spectrum sound. Low part of the spectrum is amazing, how amp effortlessly drives bass notes is simply astonishing. That's enough of words but every one of them is pure truth.

sonnya · 19th March 2012, 10:31 PM

I think it is time that we in europe starts constructing something new and innovative like this amp, The FETzilla.

Most amps you find on the market or in this forum are mostly ripoffs of old RCA, krell, Mark xxx, Pass constructions....

Only on the CLASS D there is happening some innovation..

The most active designer around as i see it is Holton from Aussie amplifier

a.wayne · 19th March 2012, 10:40 PM

Quote:

Originally Posted by Lazy Cat

After

Very nicely done LC, any concerns with transf so close..? if not the packaging is exquisite..

Congrats ...............

pinnocchio · 19th March 2012, 11:19 PM

Quote:

Originally Posted by sonnya

I think it is time that we in europe starts constructing something new and innovative like this amp, The FETzilla.

Most amps you find on the market or in this forum are mostly ripoffs of old RCA, krell, Mark xxx, Pass constructions....

Only on the CLASS D there is happening some innovation..

The most active designer around as i see it is Holton from Aussie amplifier

I guess you've been sponsored by Aussie amplifiers...

Ripoff or not, it is the diy world. people want to learn and experience. And btw, Pass is supporting diy efforts.

However, true, the FetZilla is really good and I have built it along with many "ripoff" amplifiers that sound extremely good!

Good thing I'm in America!

Do

guitar89 · 20th March 2012, 05:55 AM

LC, may I know where is the PC layout diagrma of your SSA BIGBT HP ? wanted to take a look at the reference, may I ?

19th March 2012, 10:08 PM	#2126
Lazy Cat diyAudio Member Join Date: Sep 2007	Yeah cool thinking Well listening tests with simultaneous measuring check-ups is what's happening. SSA has now something like 20 hours of music burn-in time and I admit that now in stereo setup this is one of the greatest amp I ever experienced. Resolution and transparency is spooky, still presented in organic full spectrum sound. Low part of the spectrum is amazing, how amp effortlessly drives bass notes is simply astonishing. That's enough of words but every one of them is pure truth. Last edited by Lazy Cat; 19th March 2012 at 10:22 PM.

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19th March 2012, 03:14 PM	#2122
apassgear diyAudio Member Join Date: Nov 2002 Location: Viña del Mar, Torreon	you are all wrong... from my perspective that's a tsunami striking the beach cheers

19th March 2012, 09:52 PM	#2125
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	Funny, that you posted pics. I was just gonna write how the project went for you.

19th March 2012, 10:31 PM	#2127
sonnya diyAudio Member Join Date: Oct 2001 Location: Denmark	I think it is time that we in europe starts constructing something new and innovative like this amp, The FETzilla. Most amps you find on the market or in this forum are mostly ripoffs of old RCA, krell, Mark xxx, Pass constructions.... Only on the CLASS D there is happening some innovation.. The most active designer around as i see it is Holton from Aussie amplifier

20th March 2012, 05:55 AM	#2130
guitar89 diyAudio Member Join Date: Dec 2010 Location: Malaysia, Selangor	LC, may I know where is the PC layout diagrma of your SSA BIGBT HP ? wanted to take a look at the reference, may I ?