700/B/Ser II Transformers

You need center tapped secondaries to get a plus and minus rail voltage. Half of your secondary voltage X 1.4 , minus 1 volt , will be a close estimate for rail voltage...
 
Perry and Lee, anything here usable?

http://www.lcmagnetics.com/transformers/multi-tap-transformer/


L/C Magnetics is a leader in manufacturing custom transformers, inductors, and current limiting reactors. We design and build a wide variety of magnetic components per specific customer requirements.





<aside class="widget widget_text" id="text-3">[h=3]L/C Magnetics Office[/h] 1139 N. Kraemer Place Anaheim, Ca. 92806
Mobile: (714) 624-4740
Toll Free: (800) 595-7096
Office: (714) 666-0787

</aside>
 
I bought 4 of those Keen-Ocean toroids for the monster monos. I mocked up the power supply for one channel and it stabilized at plus/minus 115 vdc ...
 
Northwinds said:
Perry and Lee, anything here usable?

http://www.lcmagnetics.com/transformers/multi-tap-transformer/


L/C Magnetics is a leader in manufacturing custom transformers, inductors, and current limiting reactors. We design and build a wide variety of magnetic components per specific customer requirements.





<aside class="widget widget_text" id="text-3">[h=3]L/C Magnetics Office[/h] 1139 N. Kraemer Place Anaheim, Ca. 92806
Mobile: (714) 624-4740
Toll Free: (800) 595-7096
Office: (714) 666-0787



</aside>
Click to expand...


I think Antek would be a better source...
 
laatsch55 said:
I bought 4 of those Keen-Ocean toroids for the monster monos. I mocked up the power supply for one channel and it stabilized at plus/minus 115 vdc ...
Click to expand...

You cannot go above 125v per rail and that is pushing it.
 
laatsch55 said:
I bought 4 of those Keen-Ocean toroids for the monster monos. I mocked up the power supply for one channel and it stabilized at plus/minus 115 vdc ...
Click to expand...

Lee
You used 2 toroids and rectifiers per channel and paralleled the rails?

1 pair of caps or 4?
 
laatsch55 said:
1 pair per toroid....
Click to expand...

Lee, I got a stack of those toroidals. Just got to find a pair of suitable aluminum cases that will look nice and match a pair of amps. Each box will have to fit 4 Caps and 2 toroids with associated rectifiers and wiring (maybe a fan).
 
Perry what part number are the units you bought. Where did you get them from
let us know

thanks in advance
 
WOPL Sniffer said:
Lee, I got a stack of those toroidals. Just got to find a pair of suitable aluminum cases that will look nice and match a pair of amps. Each box will have to fit 4 Caps and 2 toroids with associated rectifiers and wiring (maybe a fan).
Click to expand...



The power supply will dwarf a 700. I mocked one up.....impressive to say the least. You will have to soft start the power supplies, I was tripping 20 amp breakers.....easily....

I was using 4--120 volt/35,000uf caps per channel, and had to pre-charge the caps using A DBT, the inrush was a killer. Toroids exhibit a greater inrush than a standard iron core transformer, so that's a factor also...
 
Last edited:
Yeah, i have been researching the soft start issue and i think i can buy a quality off the shelf unit. I'll keep you posted. As far as the part numbers for the toroids, they were a special wind from ocean-keen for a customer that went unused. You'll have to contact them for part number and duplication, these are not marked. I also have been researching the differences between a center tapped secondary and a dual secondary and apparently, you CAN use a dual secondary and just tie the 2 corresponding wires and get the same results as a center tap. You'll still get your + and - for rails after grounding the correct wires after tying.
 
A lot of the older PL's had 2 secondary windings, that's why you'll see 2 wires going to the bus bar....
 
Well, doing a schematic in CAD is no problem, it's the layout that's a bear. I shoulda just bought the whole ball of wax (gerbers etc...) and just built a box. I haven't done a layout in many years.
 
WOPL Sniffer said:
Yeah, i have been researching the soft start issue and i think i can buy a quality off the shelf unit. I'll keep you posted. As far as the part numbers for the toroids, they were a special wind from ocean-keen for a customer that went unused. You'll have to contact them for part number and duplication, these are not marked. I also have been researching the differences between a center tapped secondary and a dual secondary and apparently, you CAN use a dual secondary and just tie the 2 corresponding wires and get the same results as a center tap. You'll still get your + and - for rails after grounding the correct wires after tying.
Click to expand...


I'll have to give one of the Cineeze Soft start boards a test to see if they really work. It's even got thermal protection for those hot days.



http://www.ebay.com/itm/2000W-Class...294188?hash=item43ef85386c:g:F7UAAOSw7ThUnQXN
 
The design for this can be simple or very complicated depending on how you want to control the soft start.
 
You must log in or register to reply here.
Back
Top