Zen Variations part 4

Nelson Pass · 23rd August 2002, 05:53 PM

The Zen variations part 4 is finished and will be available
next week. Most Probably.

The production boards are better than the prototype, and
we are very pleased at the results.

Meanwhile, for those of you carving metal in anticipation,
here is a picture and dimensioning of the PC board. It
contains everything for one channel except the unrequlated
power supply at 50 volts @ 2 amps per channel. The
amplifier is designed to draw 100 watts per channel, but can
also easily be set up to draw 67 watts.

Accordingly we will be recommending 300 VA of transformer
per channel (36 V @ 8 amps) and .25 deg C/watt per channel
heat sinking.

www.passlabs.com/temp/z4pcbtop.tif

www.passlabs.com/temp/z4pcbmech.tif

fcel · 23rd August 2002, 06:45 PM

So, only Q1, Q2 & Q5 needs to be on the ("big") heatsink?

HarryHaller · 23rd August 2002, 07:13 PM

The PCB before the schematic heh....... Could that be a ZVP3310 source follower on the input? Tune in next week for the exciting conclusion!

H.H.

Karen · 23rd August 2002, 07:25 PM

fcel - Yes, Q1, Q2, and Q5 only need the heat sink.

H.H.- same bat time, same bat channel. KaPowee!!

HarryHaller · 23rd August 2002, 07:34 PM

Don't you mean dadadadada..... Passman!

P.S. I just noticed that was my 1001 post! That alone sould put me in the Sin Bin..........

skaara · 23rd August 2002, 10:30 PM

Is zen v.4 SuSy circuit?

Nelson Pass · 23rd August 2002, 10:36 PM

No. SuSy is for desert. Later. Much Later.

mefinnis · 23rd August 2002, 10:56 PM

Quote:

Originally posted by HarryHaller
Don't you mean dadadadada..... Passman!

Now we have identified the Bat .... we just need to locate the Riddler, the Joker, the Penguin and King Tut

jh6you · 24th August 2002, 12:23 AM

67 watts--meaning that the 250VA-transformer
of 24V @ 5 Amps still useful? Expecting so.

... Nice weekend!

Selfmade · 25th August 2002, 06:23 PM

Can I use only one "big" transformer (600 VA; 2 x 35 V) for left and right channel or is it better to use two separat transformer.

23rd August 2002, 05:53 PM	#1
Nelson Pass The one and only Join Date: Mar 2001	Zen Variations part 4 The Zen variations part 4 is finished and will be available next week. Most Probably. The production boards are better than the prototype, and we are very pleased at the results. Meanwhile, for those of you carving metal in anticipation, here is a picture and dimensioning of the PC board. It contains everything for one channel except the unrequlated power supply at 50 volts @ 2 amps per channel. The amplifier is designed to draw 100 watts per channel, but can also easily be set up to draw 67 watts. Accordingly we will be recommending 300 VA of transformer per channel (36 V @ 8 amps) and .25 deg C/watt per channel heat sinking. www.passlabs.com/temp/z4pcbtop.tif www.passlabs.com/temp/z4pcbmech.tif

23rd August 2002, 07:13 PM	#3
HarryHaller Banned Join Date: Feb 2002 Location: Dallas,Texas	The Zen variations part 4 trailer The PCB before the schematic heh....... Could that be a ZVP3310 source follower on the input? Tune in next week for the exciting conclusion! H.H.

23rd August 2002, 07:25 PM	#4
Karen diyAudio Member Join Date: Sep 2001 Location: Foresthill, CA	fcel - Yes, Q1, Q2, and Q5 only need the heat sink. H.H.- same bat time, same bat channel. KaPowee!! __________________ ..K

23rd August 2002, 07:34 PM	#5
HarryHaller Banned Join Date: Feb 2002 Location: Dallas,Texas	Batman Don't you mean dadadadada..... Passman! P.S. I just noticed that was my 1001 post! That alone sould put me in the Sin Bin..........

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23rd August 2002, 06:45 PM	#2
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	So, only Q1, Q2 & Q5 needs to be on the ("big") heatsink?

23rd August 2002, 10:30 PM	#6
skaara diyAudio Member Join Date: Jun 2002 Location: Europe, Slovenia	Is zen v.4 SuSy circuit?

23rd August 2002, 10:36 PM	#7
Nelson Pass The one and only Join Date: Mar 2001	No. SuSy is for desert. Later. Much Later.

24th August 2002, 12:23 AM	#9
jh6you Account Disabled Join Date: Aug 2002 Location: Near to the Pacific Ocean	67 watts--meaning that the 250VA-transformer of 24V @ 5 Amps still useful? Expecting so. ... Nice weekend!

25th August 2002, 06:23 PM	#10
Selfmade diyAudio Member Join Date: Feb 2002 Location: Flensburg	Can I use only one "big" transformer (600 VA; 2 x 35 V) for left and right channel or is it better to use two separat transformer.

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