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Old 16th September 2006, 01:31 AM   #21
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Location: Dallas, Texas
Quote:
Originally posted by Babowana
I follow Papaís rule of thumb for the transformers.
I consider max 2A bias (actual 1 to 2A).
I consider 20V rails.
2.5 x 2 x (20+8) x2 = 280VA
Hmm . . . two 300VA for two mono blocks.
(20+8+3)/1.4 = 22Vac

Okay, I am going to order two of (110-0, 110-0 / 22-0, 22-0 / 300VA / 50Hz).

Hi Babowana,

In my case, probably 600VA would have been big enough,
but I already had 2 1KVA transformers with 30V secondaries.
So that is what I used. I used 40,000uF caps, which brought
the voltage to just under 38V before regulation.

I do not know how to measure the noise floor, but from just
listening, these amps are as quite as any other amp I own
(which includes a Pass Labs X150). And I have 96db@1W@1m,
horn loaded speakers (ie: my speakers are sensitive to noise).

So I think the power supply is really, REALLY good. But it is
also expensive.

Robert
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Old 16th September 2006, 02:41 AM   #22
lineup is offline lineup  Sweden
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Default Regarding Zen V5

Quote:
Originally posted by Babowana
Yes, Zen V5! Thatís it. Itís simple enough. P2p is feasible. And, it is an amp easily flexible. Most of all, Papa admits that Zen V5 gives so good sounds as to live with it for a couple of years.

So, Papa, I want to build Zen V5. I enjoy not only second harmonics, but also well-done third harmonics. I love Zen V2, and I dream that I will be getting in love with V5 too.
Hello ZENY.
I loved your zeny headphone amp project, and did some discussing.

Jyou and I have some similiar tastes - in amps. It looks like it.
See this post of the 17th January, which got no response whatsoever
( http://www.diyaudio.com/forums/showt...402#post818402 )
lineup said:
Zen V5
is an amplifier circuit I like


... and I say it again here:
If I would go for a Pass Amp project,
ZEN v5 - Complementary ZEN from 2003 would be IT

This circuit looks very simple.
But regarding details as well as power supply quality demand
it is probably a bit of a challenge to build and get it good.
But when this is can be achieved and has been done,
you would have an amplifier with good sound quality and performance:
Quote:
Original Conclusion by Nelson Pass (2003 Pass Laboratories)

This is a very good sounding amp.
It sounds most like ZV2,
but with a bit more power and a little more punch on the bottom.
......
I believe I could live with this for a couple of years.

.
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Old 16th September 2006, 03:36 AM   #23
Formerly "jh6you". R.I.P.
 
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Default Re: Regarding Zen V5

Quote:
Originally posted by lineup


Jyou and I have some similiar tastes - in amps. It looks like it.

Yes, we have very good tastes . . .

Welcome back to normal life.
How was the taste of the sinbin . . . ? No rain there . . . ?
I am sure I would also visit there one day . . . I feel so . . .


Quote:
Originally posted by audiorob


. . . these amps are as quite as any other amp I own
(which includes a Pass Labs X150). And I have 96db@1W@1m,
horn loaded speakers (ie: my speakers are sensitive to noise).

So I think the power supply is really, REALLY good. But it is
also expensive.

Good news. Many thanks!
Often I don't trust Papa, but I believe in his things . . .

Luckily, I can get cheap caps and coils . . .
The qualities are similar as the expensive brands if I open my mind a bit wider . . .
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Old 16th September 2006, 09:31 AM   #24
lineup is offline lineup  Sweden
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The ones know better about Sin Bin and who you should ask are the regulars over there:
I wont tell you no names, it wouldnt be polite, really,
but you will find (among such still around at diyaudio) both moderators
and the owner! of this website himself has joined the gang at occations.
sin bin history

.........................................


Zen Mod has made his ZEN-v5 using this PCB layout:
http://www.diyaudio.com/forums/showt...428#post999428

MEGA-amp used this PCB layout ( by PedroPO ) detailed photos provided:
http://www.diyaudio.com/forums/showt...655#post522655

Myself,
I like the idea of point to point ( p2p ) direct solder construction of this amp.
Would probably be my choice for a final amplifier, too.
Because teoretically this is the optimal way to assemble an audio circuit.
As air is the best electrical isolator material - ask all the radio ham amateur diy builders!

Most DIY audio builders have their own preferences, when building.
Any method has got some advantages and many different proceures can work good.
We use what we are comfortable with.

First protype I would build on a veroboard or something like this:
No-Copper experiment board: http://www.trimlog.se/butik/images/p...mages/VB-5.gif

My personally favourite among board for experiments, as well as some finished amplifiers is
Copper Islands lab board.
I use a knife and a ruler, carve a few strokes
and then I can easily break such a 100x160mm board into smaller size pieces.

Here is pictures of this my personal favourite I have used for many of my projects:

Click the image to open in full size.
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Old 16th September 2006, 01:42 PM   #25
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Can you imagine two mono blocks . . . ?

The big cap says 35WV 33000uF CE-SM 85degC (M) . . .
Total 6 per mono block . . .
The small cap (wakeupcall cap) says 35V 2200uF 85degC (M) . . .

No, not audiophile quality . . .

I could not find inductors . . .
It seems that I should buy a small role of coil for diy . . .
Or, I just give the first trial with CRC . . .

I ordered two 110-0 110-0/ 22-0 22-0 50/60Hz 300VA transformers . . .
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File Type: jpg capacitor3.jpg (96.3 KB, 1152 views)
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Old 16th September 2006, 02:32 PM   #26
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[IRFP250N / IRFP9240]
I have 12 sets of IRFP250N/IRFP9240. I understand that these two have quite different gain variations. Umm . . . I would meet more 2nd harmonic distorsion, by using these sets.

[IRF140 (IR) / IRF9140 (M) - TO-3]
I got 12 second-hand sets. Hmm . . . not new, but used . . .

I am in dillemma . . . with which set I should go . . .
I could not find any others . . .
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Old 16th September 2006, 06:09 PM   #27
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by lineup



Zen Mod has made his ZEN-v5 using this PCB layout:
http://www.diyaudio.com/forums/showt...428#post999428
006-07-03_140901_706.jpg[/IMG]

nope
that's pic of Babelfish J,not ZV5
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Old 16th September 2006, 08:19 PM   #28
lineup is offline lineup  Sweden
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Quote:
Originally posted by Zen Mod
that's pic of Babelfish J,not ZV5
Okay, Zen Mod

But this is, I hope
a PCB layout for Zen v5:
http://www.diyaudio.com/forums/showt...655#post522655
Quote:
Originally posted by lineup

MEGA-amp used this PCB layout ( by PedroPO ) detailed photos provided:
http://www.diyaudio.com/forums/showt...655#post522655

Myself,
I like the idea of point to point ( p2p ) direct solder construction of this amp.
Would probably be my choice for a final amplifier, too.

We use what we are comfortable with.
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Old 21st September 2006, 01:14 PM   #29
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Here is my p2p layout . . .
Wondering any error . . .
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File Type: jpg zv5-wiring.jpg (79.2 KB, 849 views)
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Old 21st September 2006, 03:36 PM   #30
lineup is offline lineup  Sweden
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in usa somewhere i have heard they say:
'howdy, partner'

here in pass labs county we may say:

passdy!
babowana


passdy!
to everybody else, too

I have downloaded you wiring diagram
and will compare it to your circuit ( think I already saved the scheme )
I doubt you have done any wrong.
After all, it is not your first amp project


question, as I dont use mosfet very much
the pins at power mosfet are,
left to right: G D S
corresponding to: B C E
is that right?
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