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Old 16th December 2008, 10:02 AM   #21
col is offline col  Australia
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It sounds like the perfect power supply would be the redrock SMPS:

http://www.redrocksaudio.es/files/SMPS6060PFC.pdf

a friend of mine recently bought one of these for a amp project and he requested the voltages he wanted when he ordered it. They are very helpful and the price is very good.

col.
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Old 18th December 2008, 02:54 AM   #22
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Default TA2022 questions.

Hi,

I have a few questions regarding your TA2022;

- It does not have any mouting holes, is there any traces near the corners ? It is hard to see from the picture and I do not want to damage anything.

- Is the female part of the white connector supplied.

- Can you supply an appropriate heatsink for this amp, cost please.

- What are the role of the 2 trim pot, is this to fix possible DC offset.

- Is there a wiring diagram available, I wonder why you have a 9 pin connector.

Last, I see a voltage regulator; Is this for the +5Vdc requirements that takes it directly from +30Vdc ?

Many Thanks,
Eric
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Old 18th December 2008, 06:54 AM   #23
Cristi is offline Cristi  Europe
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Although i finished the stock of this board, i will give few explanations for who is still interested. The board i will replace with a newer version, which has the rectifier bridge on board, filter capacitors and heatsik. i wait the pcb's from factory, this days should arrive, so in about one week i will have few pcs complete assembled and tested. i will attach some screen-shoot from pcb view.

About TA2022 board, i made this design to fit with a particulat housing, which was also the heatsink for this amplifier. the pcb was kept in place by some side rails in the chassis.
i supply the board with both male-female connector. although i didn't made the photo for heatsink, for those who request i supplied heatsink without additional cost. the trimpot are used to adjust DC offset. the offset is already set, no need to readjust. i will post the pinout for the board, there can see the connections. there are 9 connections because 4 pins are used for GND, 3 for signal in, one mute, one status and one +5V Out. 5V regulator is used to regulate the 5V voltage, from 30V thru one resistor, so on the pins of the regulator are about 20V.
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Old 18th December 2008, 06:56 AM   #24
Cristi is offline Cristi  Europe
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The screenshot of the new pcb version
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Old 18th December 2008, 11:14 AM   #25
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Hi Cristi,

Thanks for the quick answer

Very nice work, please let us know when the new PCB are available for purchase.

Regards,
Eric
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Old 19th December 2008, 02:32 AM   #26
col is offline col  Australia
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cnx, would it be possible to power DA-1 from a pair of 400W 36V SMPS in series? Something like a bigger version of these: http://cgi.ebay.com.au/ws/eBayISAPI....id=p2759.l1259

A pair wired in series would give me around 800W 72V 20A. Might be a cheap option. I would only have to do the 12V+ separately.

col.
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Old 22nd December 2008, 04:55 AM   #27
col is offline col  Australia
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Default TA3020 TA2022 DA-1 arrived

Hi Cnx,

My boards just arrived. That was very quick considering the Christmas season.

They are all in good shape and look like they travelled well. One thing, on the TA3020 you need to tighten the signal connection screws before shipping. They had vibrated loose and one of them had fallen out. Luckily I found it in the bottom of the box, it is tiny.

All the boards look very professionally assembled.

Did you see my other questions regarding power supply for the DA-1? Perhaps you are working on a SMPS?


cheers,
col.
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Old 22nd December 2008, 05:02 AM   #28
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Default TA2022 PCB out of stock or not...

Hi Cristi,

Col just received his boards but I was under the impression that you did not have any TA2022 left, this is why I did not ordered mine. Maybe I will wait for the improved version with bridge rectifier and filtering cap.

Can I order soon or are you still testing the first batch.

Thanks in advance.

Eric
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Old 22nd December 2008, 09:42 PM   #29
col is offline col  Australia
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Default TA2022 board connections

Hi Cristi,

Could you please explain which connector is for power in and which is for speaker out? There is no writing on the PCB.

cheers,
col.
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Old 24th December 2008, 05:05 AM   #30
Cristi is offline Cristi  Europe
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for the TA2022 board, left connector is for power, pin1 +, pin 2,3 GND, pin 4 - . the right connector is for audio output, pin 1 out L pin 2,3 GND, pin 4 Out R. the new TA2022 boards are on the way, i hope will arrive today, i'll let you know when they are here.
untill then, MERRY CHRISTMAS for everybody
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