Basicly what I'm going to be doing is gonna split the signal between the input board and "split it" to 2 output boards.
UPDATE...
Nice....
The Canadian government wants to make sure we dont get injured by sharp boards !!
Nice....
The Canadian government wants to make sure we dont get injured by sharp boards !!
Right now my priority is to populate the boards, including the power supply one which is being the biggest expense right now eclipsing the driver and output boards.
Power Supply BOM...
Last edited:
Time for Update.....
went out for a quick job this morning and when i got home i got a lil surprise in the mail box, which was a failed delivery notification - Parcel is at the post office and will be going to pick it up shortly 🙂
Otherwise my local EPS had great luck and picked up most of the stuff...
Still short a few resistors but right now need to grab those boards 😀
went out for a quick job this morning and when i got home i got a lil surprise in the mail box, which was a failed delivery notification - Parcel is at the post office and will be going to pick it up shortly 🙂
Otherwise my local EPS had great luck and picked up most of the stuff...
An externally hosted image should be here but it was not working when we last tested it.
Still short a few resistors but right now need to grab those boards 😀
Assembly of the boards has begun...
Driver Board...
Output Board...
Completed so far....
Now gotta deal with a few issues with parts, as .22Ohm 5W just noticed they are plain 5% and as you can see still no filtering caps.
Assembly went smooth, finished all that in 45 minutes.
ONLY a issues...
1.- 1N5408 legs are too thick and don't fit through the hole in the board, i think i was given the wrong package.
Any suggestions Panson ??
2.- Parts guy screwed up the 10Ohm resistors from the driver to the base of the NJLXXXX are 1/4W instead of the 1/2W safe to use or return them and get 1/2W ??
Driver Board...
Output Board...
Completed so far....
Now gotta deal with a few issues with parts, as .22Ohm 5W just noticed they are plain 5% and as you can see still no filtering caps.
Assembly went smooth, finished all that in 45 minutes.
ONLY a issues...
1.- 1N5408 legs are too thick and don't fit through the hole in the board, i think i was given the wrong package.
Any suggestions Panson ??
2.- Parts guy screwed up the 10Ohm resistors from the driver to the base of the NJLXXXX are 1/4W instead of the 1/2W safe to use or return them and get 1/2W ??
Last edited:
Hi Adrculda,
Please solder them as surface mount devices.
Beware of oscillation issue if pre-driver is used. Output triple EF has very high gain. I suggest you start with driver and output with pre-driver omitted. Pre-driver is then added after everything working.
1/2 W should be used for your high power design.
Panson
Last edited:
Thanks for the quick reply...
Mounted the diodes as per you instructions, only issue right now is that I have miscounted and ordered 4 instead of 8 :S
I guess I'll take a trip into town tomorrow and get the few lil items that they have stock on, and order the caps from Digikey directly as the ones i have picked up they are just generic E's and they dont even fit on the board side by side and they charged me 2x more than i could have bought Nichicon KZ's of the same value !
Would 2x 0.47Ohm 2W Metal film resistors do on the emiter ??
Mounted the diodes as per you instructions, only issue right now is that I have miscounted and ordered 4 instead of 8 :S
I guess I'll take a trip into town tomorrow and get the few lil items that they have stock on, and order the caps from Digikey directly as the ones i have picked up they are just generic E's and they dont even fit on the board side by side and they charged me 2x more than i could have bought Nichicon KZ's of the same value !
Would 2x 0.47Ohm 2W Metal film resistors do on the emiter ??
Last edited:
Got some specs on the Trafo today 🙂
I'm just not too happy with the price... $542 for 1 PLUS Shipping !!!
An externally hosted image should be here but it was not working when we last tested it.
I'm just not too happy with the price... $542 for 1 PLUS Shipping !!!
How is your project going? I prefer using more smaller transformers than a big big one.
I am preparing to build a stereo amp using my existing boards. Four 330VA transformers will go into the big chassis. This is not a high power one (high supply rail voltage), but aimed for delivering high output current for difficult loads.
I prefer to have both if possible at the expense of weight....
2 x 1KVA Antek AN-10440 Trafos 40VAC @ 25A in parallel + 12V 2A + 18V 2A.
Cap Bank will be 10 x 15000uF 63V Nichicon KMH's ( 5 per Rail - Bought 24 of them HERE )
A Antek AN-4450 400VA will be used to supply clean power to the driver section.
This will be housed on a separate board with 4 x 1000uF , 2 x 100uF, and 10uF film caps.
Goal is to keep a noise and ripple to a minimum, currently debating a regulated supply for the driver section.
Currently debating replacing the 1N5408 with APT15D100KG as T0220 would be easier to solder in and can provide a more "professional" look instead of the current mounting of the 1N5408's
2 x 1KVA Antek AN-10440 Trafos 40VAC @ 25A in parallel + 12V 2A + 18V 2A.
Cap Bank will be 10 x 15000uF 63V Nichicon KMH's ( 5 per Rail - Bought 24 of them HERE )
A Antek AN-4450 400VA will be used to supply clean power to the driver section.
This will be housed on a separate board with 4 x 1000uF , 2 x 100uF, and 10uF film caps.
Goal is to keep a noise and ripple to a minimum, currently debating a regulated supply for the driver section.
Currently debating replacing the 1N5408 with APT15D100KG as T0220 would be easier to solder in and can provide a more "professional" look instead of the current mounting of the 1N5408's
Last edited:
Soft Start will be easily implemented with a simple time delay circuit and a DPDT relay that will set the primaries in series with a 10W 0.33R Resistor or PTC.
Running the primaries in series will allow a theoretical half loading while the resistor or PTC will be the current limiting element. The power switch will be operating the driver stage power supply where the it also going to be the source voltage for the timing and soft start circuit.
3 relays will be employed in total for the ( 2 soft start - one for each transformer and 1 for the power to the transformers acting as an on/off switch ).
Running the primaries in series will allow a theoretical half loading while the resistor or PTC will be the current limiting element. The power switch will be operating the driver stage power supply where the it also going to be the source voltage for the timing and soft start circuit.
3 relays will be employed in total for the ( 2 soft start - one for each transformer and 1 for the power to the transformers acting as an on/off switch ).
Finally got some time off work :s
And since i had some time to think and "doodle" a bit...
Here's the rough draft of the supply !
And since i had some time to think and "doodle" a bit...
Here's the rough draft of the supply !
An externally hosted image should be here but it was not working when we last tested it.
This supply was designed around 2 x 1KVA Antek 10440 Toroids with 40V Secondaries tied in parallel for maximum current output...
Each Transformer will feed each board separately. As you have noticed the positive and negative side is identical besides the polarities on caps and bridges...
C1, C2, C3, C4, C5, C6, C7, C8 ( typo for C9 ) -> 0.1uF 400V Vishay
C11, C12, C13, C14, C15 -> 15000uF 63V Nichicon KMH
C16 & C17 -> 1000uF 100V Nichicon FW
C20, C21, C22 -> 4700uF 35V Nichicon FW
C18 & C23 -> 150uF 63V Film EPCOS
C19 -> 15uF 100V Film EPCOS
Main rectifiers ( D1 ) are 2X Crydom M5060SB600
Secondary Bridges are standard 10A off the shelf units.
Driver Board will supplied separately from the output board at a higher voltage which can be selectable from SW1 and SW2 at 80VDC or 88VDC.
Output boards are almost complete, still trying to find output resistors and for the driver boards still searching for the silver mica comp caps 🙁
Local Suppliers suck !!
Might have to ebay it since i already found a source HERE for the resistors.
Each Transformer will feed each board separately. As you have noticed the positive and negative side is identical besides the polarities on caps and bridges...
C1, C2, C3, C4, C5, C6, C7, C8 ( typo for C9 ) -> 0.1uF 400V Vishay
C11, C12, C13, C14, C15 -> 15000uF 63V Nichicon KMH
C16 & C17 -> 1000uF 100V Nichicon FW
C20, C21, C22 -> 4700uF 35V Nichicon FW
C18 & C23 -> 150uF 63V Film EPCOS
C19 -> 15uF 100V Film EPCOS
Main rectifiers ( D1 ) are 2X Crydom M5060SB600
Secondary Bridges are standard 10A off the shelf units.
Driver Board will supplied separately from the output board at a higher voltage which can be selectable from SW1 and SW2 at 80VDC or 88VDC.
Output boards are almost complete, still trying to find output resistors and for the driver boards still searching for the silver mica comp caps 🙁
Local Suppliers suck !!
Might have to ebay it since i already found a source HERE for the resistors.
Last edited:
Update:
More parts have arrived...
50 Pcs - 0R22 5W Non Inductive Resistors
5 pcs - 15pf Silver Mica
10 pcs - 180R 1/2W Resistors - 1% Tolerance
10 pcs - 560R 1/2W Resistors - 1% Tolerance
On the driver board now only missing ( back ordered )
C1 - 390pF
C6 & C7 - 390uF
More parts have arrived...
50 Pcs - 0R22 5W Non Inductive Resistors
5 pcs - 15pf Silver Mica
10 pcs - 180R 1/2W Resistors - 1% Tolerance
10 pcs - 560R 1/2W Resistors - 1% Tolerance
On the driver board now only missing ( back ordered )
C1 - 390pF
C6 & C7 - 390uF
- Status
- Not open for further replies.