ZEN V.4 Parts

billy · 16th September 2002, 04:05 PM

Hello, can i use BC550 instead of ZTX450 and IRFP9610 or IRFP9520 instead of ZVP3310A?

If i use +-35VDC power supply,how about the output watts?

Thank you!!

till · 16th September 2002, 04:30 PM

BC550C works instead of ZTX450 in my Zen V2.

I want to try BD139 in a test Version of V2 next, with lower resistor values in the current source, and cascoded gain transistor.

kirc · 16th September 2002, 06:14 PM

I'm using MPSA 42 instead of ZTX450. It's work OK !
The only problem maybe, that the VBE voltage is not 0.66V, but it's higher (about 0.77V). The result is a higher bias accros the Q1 and Q2.

best regards,
Leon

kirc · 16th September 2002, 06:23 PM

Ups...

And about Mosfet ZVP3310A. I'm using IRF9620 and work OK. IRF9610 is better than IRF9620. IRF9520 is also good choise. There is no problem with part, maybe the capacitors (quality and values) are quite important.

My version of ZEN v4 works great.

best regards,
Leon

Nelson Pass · 16th September 2002, 08:47 PM

The 9610 worked OK, but I did get better performance
with the ZVP3310. If you lower the impedance of the
feedback loop, you can even this up a bit.

miguel2 · 19th December 2002, 11:20 AM

Hi,

Sorry to bring this up again, but I am having an hard time to get ZVP3310's. So I will be using IRF9610. My questions are:

- Does the Zen V4 works with IRF9610 without any modifications?

- What changes shall I make to optimise it:

Quote from NP:

"If you lower the impedance of the feedback loop, you can even this up a bit."

How can this be done? (ie. parts values please)

Thanks.

jean-paul · 19th December 2002, 11:30 AM

From what I heard a BS250 mosfet will also work. Please note that I heard this, I have not the slightest experience with Zen products.

df · 19th December 2002, 01:38 PM

My Zen V4 works with BS250 better then with IRF510, I have tried both....

Daniel

df · 19th December 2002, 01:43 PM

Sorry IRF9610 not IRF510!

miguel2 · 19th December 2002, 03:11 PM

hi df,

have you made any changes in the feedback loop as Nelson says?

16th September 2002, 04:05 PM	#1
billy diyAudio Member Join Date: Dec 2001 Location: Hong Kong	ZEN V.4 Parts Hello, can i use BC550 instead of ZTX450 and IRFP9610 or IRFP9520 instead of ZVP3310A? If i use +-35VDC power supply,how about the output watts? Thank you!!

16th September 2002, 06:14 PM	#3
kirc diyAudio Member Join Date: Aug 2001 Location: Slovenia	I'm using MPSA 42 instead of ZTX450. It's work OK ! The only problem maybe, that the VBE voltage is not 0.66V, but it's higher (about 0.77V). The result is a higher bias accros the Q1 and Q2. best regards, Leon __________________ Music is a part of my life, DIY is my life.

16th September 2002, 06:23 PM	#4
kirc diyAudio Member Join Date: Aug 2001 Location: Slovenia	Ups... And about Mosfet ZVP3310A. I'm using IRF9620 and work OK. IRF9610 is better than IRF9620. IRF9520 is also good choise. There is no problem with part, maybe the capacitors (quality and values) are quite important. My version of ZEN v4 works great. best regards, Leon __________________ Music is a part of my life, DIY is my life.

19th December 2002, 11:30 AM	#7
jean-paul diyAudio Moderator Emeritus Join Date: Sep 2002 Location: The Netherlands	From what I heard a BS250 mosfet will also work. Please note that I heard this, I have not the slightest experience with Zen products. __________________ It's only audio

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16th September 2002, 04:30 PM	#2
till Banned Join Date: Apr 2002 Location: Germany, Clausthal	BC550C works instead of ZTX450 in my Zen V2. I want to try BD139 in a test Version of V2 next, with lower resistor values in the current source, and cascoded gain transistor.

16th September 2002, 08:47 PM	#5
Nelson Pass The one and only Join Date: Mar 2001	The 9610 worked OK, but I did get better performance with the ZVP3310. If you lower the impedance of the feedback loop, you can even this up a bit.

19th December 2002, 11:20 AM	#6
miguel2 diyAudio Member Join Date: Jun 2002 Location: Portugal	Hi, Sorry to bring this up again, but I am having an hard time to get ZVP3310's. So I will be using IRF9610. My questions are: - Does the Zen V4 works with IRF9610 without any modifications? - What changes shall I make to optimise it: Quote from NP: "If you lower the impedance of the feedback loop, you can even this up a bit." How can this be done? (ie. parts values please) Thanks.

19th December 2002, 01:38 PM	#8
df diyAudio Member Join Date: May 2002 Location: Switzerland	My Zen V4 works with BS250 better then with IRF510, I have tried both.... Daniel

19th December 2002, 01:43 PM	#9
df diyAudio Member Join Date: May 2002 Location: Switzerland	Sorry IRF9610 not IRF510!

19th December 2002, 03:11 PM	#10
miguel2 diyAudio Member Join Date: Jun 2002 Location: Portugal	hi df, have you made any changes in the feedback loop as Nelson says?

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