I will build this PA B500, my box is ready with dimensi 2U, elco Philips 17.000uf/65-100vdc x 2pcs and toroid CT47vac only 700VA..I think too small VA for stereo...How much VA toroid ideal for stereo B500??
Pozdrav..
Pozdrav..
Use what you have, and for next amplifier you use 1500VA for stereo. I use 1000VA for stereo. Crown use 800VA in XLS602 (2x980W on 2R) 😎
Pozdrav
Hi apex!
Are each of those output par 2SC5200/2SA1943 paired?
Pozdrav g. Apex! 🙂
Izlazni tran. parovi 2SC5200/2SA1943 su upareni?
Are each of those output par 2SC5200/2SA1943 paired?
Pozdrav g. Apex! 🙂
Izlazni tran. parovi 2SC5200/2SA1943 su upareni?
b500 step driver using tlo72
apex...
sir...can post schematic diagram of your step driver using TL072???...🙂
tnx...
regards...
apex...
sir...can post schematic diagram of your step driver using TL072???...🙂
tnx...
regards...
Yes, but you have much simpler solutions for diy, like in Mackie SRM450 (only fet with zener and cap).
Regards
My psu capacitors are on a slow boat from China so probably a couple weeks before I can try her out. Hope they are ok as I bought the cheapest 100v's I could find. Got a transfo and heatsink. Gives me time time to finish building a case etc. I'm using some steel 2x8 stud I got out of a dumpster. Going to be a big ugly case to fit in two transfos. Personally I like my stuff to look DIY as long as it sounds good. DIY isn't really that much cheaper but can spread the cost out and learn something so I like doing it. Also can fix if problems later and mod to taste. Thanks to Apex for sharing the design. Hope I can get it to work. Boards seem ok but only one way to find out. Still not sure about the relay for the soft start. No PCB; guessing I just mount a relay on the case by the mains. Never used relays before so good chance to learn something. Peace out.
apex,
this is from thread h900 post #411
b500 using tlo72 step driver
from apex,
From PSU goes HV and MV. HV goes together on step and to amp for supply VAS. OVD goes to output stage, which is disconeted from HV. MV goes only to step driver.
please check my interpretation if correct
please see attachment
regards
this is from thread h900 post #411
b500 using tlo72 step driver
from apex,
From PSU goes HV and MV. HV goes together on step and to amp for supply VAS. OVD goes to output stage, which is disconeted from HV. MV goes only to step driver.
please check my interpretation if correct
please see attachment
regards
Attachments
![APEX%20B500%2BTL072%20STEP[1].jpg](/community/data/attachments/151/151895-bafcc1efeb79088616d52e90a195223b.jpg?hash=uvzB7-t5CI)
That's correct, and dont forget +/-15V from zeners to suply TL072 in step driver, and +/-REF from output emiters,
Regards
this caps height is only 2 inches
i'm exited using this caps making my case only 4inches in height
using torroid and 3 inches fan
can i use two 12v fan in series using your protect circuit
regards
