Good price, very tempting 🙂
I wonder if the BBM setting can be pulsed, to enable fine adjustment.
I wonder if the BBM setting can be pulsed, to enable fine adjustment.
col said:
Hi Col,
Silly question, what are those three connectors close to TA3020 print on the board
+5v - 30 to 60v and -12v respectively? Could you point out to a Toroid which could supply all three?
TIA
S. Bhat
Probably better to let Arjen answer technical questions regarding this module. Well if it is his one anyway.
I would presume that the 3 connector blocks are the left and right speaker out and the center block the power rails. Signal in must be on the other side of the heatsink, obscured from view in that photo.
I also presume that this board only needs a dual 30-0-30 to 45-0-45 trafo but with the filter caps and rectifiers bringing the voltage up to a maximum of 60v+-. I'm hoping that 20000uF per rail should be fine.
col.
I would presume that the 3 connector blocks are the left and right speaker out and the center block the power rails. Signal in must be on the other side of the heatsink, obscured from view in that photo.
I also presume that this board only needs a dual 30-0-30 to 45-0-45 trafo but with the filter caps and rectifiers bringing the voltage up to a maximum of 60v+-. I'm hoping that 20000uF per rail should be fine.
col.
col said:
Hi Col,
Thanks a lot for double quick reply. Have a look at post 72 on this thread which has a pic of Arjen's board. The other end of board has four double channels. Thought this would be two for audio in and two for audio out. Again assuming both the boards are same. Incidentally connexelectronic website says that board will be shipped from Hong Kong 🙂
S. Bhat
col said:
Just an FYI for anyone not willing to make an account just to check the total price.
$69.99 + 19.99 shipping + $13.30 for something called "FL TAX 19.0%" = $103.28
theAnonymous1 said:
Do you think it would be workable to feed one of the BBM pins on the TA3020 with a PWM signal at say 1 MHz?
232 said:
why you would do that ? to overmodulate the carrier ? i would not suggest you to do this, since the result will be worst, possible fatal for MOS-FET's and IC.
cnx said:
Excuse this delayed reply. It was merely a question if the TA3020 might have a built-in 'hidden feature', for example, if the BBM1 was set at 1 and BBM0 was pulsed at 25/75 (1/0) duty cycle, would this give a deadtime of 30 ns?
232 said:
Yeah, but it will hurt in respect of handling speaker impedance, which is 8 ohm as it is...in balanced the amp will see it as 4ohm, which it supposedly wont like, unless you lower voltage/output
But sure, its really neat as a stereo amp with onboard supply, which does have some attraction...and could be convenient in a multiamp setup, which means 2 x stereoamps offering 2 exstra channels fore free...man, how could I forget that, now Im really tempted 😀
v-bro said:
Looks nice V-bro 🙂
How do you expect the sound quality would be compared to truepath which has seperate psu etc. ?
Is it possible to use two amps to one trafo?
Ofcourse i loose effect but it would be nice to drive
my speakers in active two way.
Ofcourse i loose effect but it would be nice to drive
my speakers in active two way.
Havoc08 said:
I have listened to this amp and was VERY surprised to hear the pounding noises come from it with tremendous precision while the tiny TO220 dual fets remained entirely cold without a heatsink! (that was at +/-32Vdc, the max. of my lab supply, but there were 4ohm speakers connected) The only thing that was warm were the pre-regulator transistors (also TO220), but nothing to worry about...
It is absolutely on par with Truepath with perhaps a littlebit sweeter mid-high range. Bass is also incredible!
This amp can be built very fast by an experienced builder and once you got the board up and running the rest is very simple. Just a box, a dual AC tranny and some plugs and cables...
I really love the design, the track lengths are incredibly short and mounting a heatsink is sooo easy with all devices pointing downwards!
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