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Old 19th April 2006, 07:39 PM   #1
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Default how to proceed

Hi,
This is my 1st message to this huge forum.

I am currently busy with making the so called "Killatone" speakers to complement my current 2.1 monitoring system.

I have already built a "kit" chip amp (what I could use for the speakers), but I like to go for something nicer.

Originally I have considered to build the Zen V4, but as far as I understand the V9 is better.

1st of all I like to know what should I build?

Next: once decided what to build I like to aks you ladies and gens for help, guidances how to realize succesfully this project.

Currently the enclosure is already in design phase = 2 rather big coolblocks on the sides, fully metal enclosure.

Any help and good word is welcome.

trif.
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Old 19th April 2006, 10:46 PM   #2
Magura is offline Magura  Denmark
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A good starting point is the Zen V1. It's a nice step up from a chip amp, and you will get a chance to get your feet wet. It's sure worth the effort to go through the zen variations one by one, as you will gain reasonable understanding of what does what, where and why.


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Old 19th April 2006, 11:08 PM   #3
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Start with Z1? hm, is it really the way to go? Can I not imeediately go with V4 or V9?

I remember when i studied physics at the univ we still had to know very well tubes, although at that time some chip amps were already coming into the market.

I would go for a tube amp, push-pull with Lundahl trafo, but I do not want to work with the high voltages (as I do not have so much expirience, although the concept is very elegant, and I believe the sound is also nice).

So, therefore my interest is in the ZENs or any other solid state amp.

trif.
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Old 20th April 2006, 01:47 PM   #4
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Actually, I do have all the components for ZV4 including trafo, but not the PCB. As I said the enclosure is in design phase, and will be done from brushed stainless steal plates + heatsinks.

But if ZV9 is better, perhaps it is not worth to build the V4. Any comment is welcome.

trif.
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Old 21st April 2006, 11:09 PM   #5
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Old 23rd April 2006, 07:47 AM   #6
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OK.

It will be ZV4. In one enclosure 2 channels.
I am currently busy with the enclosure design/preparation for manufacturing.

Is it better to go for 2 transformers (one per channel)?

I like to have some GUIDANCES on that, because the enclosure size will be mainly determined by the number of transformers (1 or 2).



Currently I have one nice torroid trafo.

trif.
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Old 23rd April 2006, 09:48 AM   #7
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Quote:
Originally posted by trifidmaster

Is it better to go for 2 transformers (one per channel)?

Acceptable.

Then, later if you find that even one is acceptable, save the other one for another.

Good luck.
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Old 23rd April 2006, 12:33 PM   #8
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OK. I am going to include into the enclosure design several (extra) holes (kind of universal bottom plate of the enclosure) for 1 or 2 trafo scenario. Yes, I know I could drill any extra holes if it is required, but I like to go for a "clean" approach, so any input on this is welcome.

On the coolblocks: I see on the Z4V sechamatics, that the PCB is grounded via the R20, 22Ohm/3W rezistor. Do I have to forseen a grounding point on the coolblock for this rezistor, or not (or on the bottom plate). If yes, is its position important, or can be anywhere on the coolblock?

trif.
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Old 23rd April 2006, 02:10 PM   #9
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Quote:
Originally posted by trifidmaster

On the coolblocks: I see on the Z4V sechamatics, that the PCB is grounded via the R20, 22Ohm/3W rezistor. Do I have to forseen a grounding point on the coolblock for this rezistor, or not (or on the bottom plate). If yes, is its position important, or can be anywhere on the coolblock?

I do not exactly know why R20.

But, I believe that Nelson Pass always thinks of the "safety first" for all diyers. The ground line of the circuit is to be connected to the chassis (the protective earth). By the way, the ground line is quite long so that the line could have any problem in the middle of the line. Therefore, it seems that the right end (PSU side) ground point is connected to the chassis with the bridge diode, meanwhile the left end (the inputside) ground point is also connected to the chassis but this time with R20. Double safety . . .

R20 is to be connected from the left end ground point to any place of chassis.

Regards
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Old 28th April 2006, 08:11 AM   #10
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The design of the enclosure is ready, here it is, what do you think?

trif.
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