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[Jack musician]

Hi,Cristi I would like to know if the iraudamp7 class D amplifer in 500 watts version
is 500 watts in 4 ohms or 8 ohms and if your A1000SMPS could drive this version
of the amplifier.
Thanks.

[dubai2000]

Hi Cristi,

I am looking for different 22R output resistors for the TA3020 V2 board. Will 5W types be sufficient? You response will be appreciated -thx in advance.

[pippo1999]

Hi Cristi,
You have a pm

[Cristi]

Originally Posted by Jack musician

Hi,Cristi I would like to know if the iraudamp7 class D amplifer in 500 watts version is 500 watts in 4 ohms or 8 ohms and if your A1000SMPS could drive this version of the amplifier.
Thanks.

the IR7 500W is on 4 ohms impendance. can be used with the smps, but with higher output voltage smps transformer to provide +-70V DC. this can be done, i have this kind of transformers too.

Originally Posted by dubai2000

Hi Cristi,

I am looking for different 22R output resistors for the TA3020 V2 board. Will 5W types be sufficient? You response will be appreciated -thx in advance.

18 - 20R at 3 to 5W is fine. i used 3W model without any problem, but if you are going to use the amplifier to play music with large content of high frequencies you might consider to use even higher power rating, 10 - 15W resistor. a good choice can be the LTO or RTO series from Vishay http://www.vishay.com/docs/49243/sg2052.pdf they can be mounted on the heatsink for better thermal performace.

Originally Posted by pippo1999

Hi Cristi,
You have a pm

i sent reply

[gianky69]

Hello Cristi,
I write you everything arrived to me 3 days ago. All perfect!
I'm now building one amp with the V3b, but I have just some questions:

1. From the main power supply I measure 100V: is it correct or it has to be 50V DC?
2. From the aux power supply I measure 9V: is it good to use with Speaker Protection Circuit (I remember you was talking about 12V DC)?
3. And about the BIPs, which DC does it need?
4. You wrote me the SMPS is good enough for every accessory, but I'm not sure about DC, colud you help me?

Thanks a lot,
Giancarlo

[Cristi]

Hello Giancarlo

the output voltage is differential, +-50V so between + or - and GND will be 50V and between - and + will be 100V. the aux. voltage can be adjusted within 4 - 16V from the small potentiometer on the edge of the board. use a multimeter to adjust the value at 12V. note that for values above 10V you may need to have a minimum load of 5-10W on the main supply, so that the smps will work in continuous mode. this isn't a problem, because the quiescent power required by any amp would be in this range.
BIPS can be powered with differential voltage from +-20 to +-55V. it has regulator on board.

be very careful when you install and use the smps !!!!! there are dangerous voltage levels present on the board.
DO NOT TOUCH ANYTHING WHEN IS POWERED ON AND AFTER POWER OFF, WAIT AT LEAST 3 MIN. TO DISCHARGE THE CAPACITORS BEFORE TOUCHING THE BOARD.

[gianky69]

Originally Posted by cnx

Hello Giancarlo

the output voltage is differential, +-50V so between + or - and GND will be 50V and between - and + will be 100V. the aux. voltage can be adjusted within 4 - 16V from the small potentiometer on the edge of the board. use a multimeter to adjust the value at 12V. note that for values above 10V you may need to have a minimum load of 5-10W on the main supply, so that the smps will work in continuous mode. this isn't a problem, because the quiescent power required by any amp would be in this range.
BIPS can be powered with differential voltage from +-20 to +-55V. it has regulator on board.

be very careful when you install and use the smps !!!!! there are dangerous voltage levels present on the board.
DO NOT TOUCH ANYTHING WHEN IS POWERED ON AND AFTER POWER OFF, WAIT AT LEAST 3 MIN. TO DISCHARGE THE CAPACITORS BEFORE TOUCHING THE BOARD.

Thanks a lot, I didn't remember about +/- 50V (what is doing my brain??? )
For BIPS so it's possible to use it with main power ,using parallel connection.
Don't worry about SMPS, I know it could be VERY DANGEROUS!!!

Thanks a lot,
Giancarlo

[inept]

I purchased (4) TDA892x Amp V2 with TDA8924TH, and 10000uf 35v capacitors.
I plan on bridging 3 of them to run my L,R, and center speakers at 4ohms.
The other one I will run in stereo for my 8 ohm surround speakers.

Cristi recommended "2x18 to 2x20V AC , the current should be at least 4A, better 5A. the transformer power rating for each module should be at least 180W."

Can I use 1 of these transformers to power two of the modules,, two transformers to power 4 modules?

Antek - AN-2220 ?

Would it be better to use separate transformers for each module?

[inept]

Originally Posted by inept

Can I use 1 of these transformers to power two of the modules,, two transformers to power 4 modules?

Antek - AN-2220 ?

Would it be better to use separate transformers for each module?

found my answer to the first question.. It's yes.
NEW Audio amplifier kits, modules and many others.

[fb]

Is it possible to have the TA3020v3b board fitted with IRFP4228 mosfets? From what I read at 41hz forums it is the best option - allows higher output and cooler running.