i remember reading somewhere that by changing some caps to a higher voltage rating the psu rails could go higher and the self-protection would be like 63v vs the stock 52v.
does anyone recall this ?
i think the caps are originally rated 63v and someone said that by changing them to 100v would allow higher rail voltages without any problems.
i have 2 large xformers with 0v-40v taps that i would love to use instead of buying another xformer(s).
thanks.
does anyone recall this ?
i think the caps are originally rated 63v and someone said that by changing them to 100v would allow higher rail voltages without any problems.
i have 2 large xformers with 0v-40v taps that i would love to use instead of buying another xformer(s).
thanks.
Voltage question
You need to be more careful in your reading. The 63 volt cutoff is for the UcD400. These cutoff voltages are set in the protection circuits of the modules and are not changed by replacing caps. If you really do want to use the 40 volt transformers you will need to go to the UcD400 modules. This combination will give a lot more power than the 180’s with their recommended transformer.
Roger
You need to be more careful in your reading. The 63 volt cutoff is for the UcD400. These cutoff voltages are set in the protection circuits of the modules and are not changed by replacing caps. If you really do want to use the 40 volt transformers you will need to go to the UcD400 modules. This combination will give a lot more power than the 180’s with their recommended transformer.
Roger
thanks sx881663 ! but i stand by my
recollection of changing some caps somewhere and being able to raise the rail voltages.
as i remember someone said that the reason the over-voltage protection was 52v was because some caps in the circuit were rated 63v and the thread went on about how changing these caps from 63v to 100v would put the over-voltage protection at 63v.
i seem to remember that it was either bruno or the guy that runs hypex that was stating this but i cant find it anywhere that i have looked so far.
when i find it i will post a link.
time to search some more.
thanks.
recollection of changing some caps somewhere and being able to raise the rail voltages.
as i remember someone said that the reason the over-voltage protection was 52v was because some caps in the circuit were rated 63v and the thread went on about how changing these caps from 63v to 100v would put the over-voltage protection at 63v.
i seem to remember that it was either bruno or the guy that runs hypex that was stating this but i cant find it anywhere that i have looked so far.
when i find it i will post a link.
time to search some more.
thanks.
Hi,
That was a discussion relating to the UCD400 around its debut.
The caps were changed very shortly afterwards and the protection limits were raised accordingly in a following revision.
Don't try that with your 180, it's not relevant to it at all, you need either a different transformer or different modules.
That was a discussion relating to the UCD400 around its debut.
The caps were changed very shortly afterwards and the protection limits were raised accordingly in a following revision.
Don't try that with your 180, it's not relevant to it at all, you need either a different transformer or different modules.
thanks classd4sure !! i knew i wasnt
imagining i had read that somewhere !
just finished reading through the first 29 pages of the hotroding thread looking for it.
im done for the night.
going to listen to my under-powered amps for a while which still sound awesome anyway.
we are moving the end of this month so i will get a fresh look at all the xformers i have in stock that i havent seen in 1yr from the last move !
thanks again for the reality check.
imagining i had read that somewhere !
just finished reading through the first 29 pages of the hotroding thread looking for it.
im done for the night.
going to listen to my under-powered amps for a while which still sound awesome anyway.
we are moving the end of this month so i will get a fresh look at all the xformers i have in stock that i havent seen in 1yr from the last move !
thanks again for the reality check.
yeeehah!!! while cleaning the garage
today i found a pair of bigass xformers that have 27v taps !!!
each is rated at 900va so i think i wont have problems with not enough current. 😉
building the new psu will have to wait until after the move at the end of the month though.
gotta figure out how to tag them so i dont lose them in the move.
will post when i get them hooked-up to the ucd180 modules.
today i found a pair of bigass xformers that have 27v taps !!!
each is rated at 900va so i think i wont have problems with not enough current. 😉
building the new psu will have to wait until after the move at the end of the month though.
gotta figure out how to tag them so i dont lose them in the move.
will post when i get them hooked-up to the ucd180 modules.
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