bosoz PSU help!? - Page 2

cowanrg · 26th May 2005, 06:39 PM

of course 800va is overkill

the idea behind it was that i couldnt find a readily available xformer in the voltage i needed in a smaller size. and i WAS planning on doing full dual mono (two xformers), but at the cost plitron and others wanted to charge for two, i could get the 800va for less money. so, i just went that route. plus, it adds a good amount of weight to the chassis making it feel more substantial.

cowanrg · 26th May 2005, 06:41 PM

another thing regarding the light bulb,

does wattage matter? if there IS a short, will it blow, or will it just get really bright? i just want to know, if i HAVE a problem, do i have to worry about having another one

steenoe · 26th May 2005, 06:54 PM

RS Components has 2x55v toroids as of the shelf item. Maybe thats available in the states too? Here is the danish site:

RS toroids

You should be able to interpret the VA ratings and the voltages.
They have sales places in the states too.

Steen

cowanrg · 26th May 2005, 06:57 PM

i got the 800va for like $65. and i didnt have to track anything down. no phone calls, no emails, etc... i just clicked order, and it was there in a couple of days

and it looks cool for a preamp.

steenoe · 26th May 2005, 07:11 PM

Quote:

and it looks cool for a preamp.

Agree, weight does matter

The 160VA I am using cost ca. 45usd.
Check the diodes with your meter, if it has diode test? Might be that.

Steen

fcel · 26th May 2005, 07:13 PM

Yes, connect the light bulb in seies with the hot wire. I would say 50W to 100W bulb should do. If there is a short somewhere, the bulb will light up very brightly but won't blow out the bulb.

cowanrg · 26th May 2005, 07:49 PM

yeah, ive got a diode tester in my meter.

steenoe,

exactly. i just wanted some weight to the thing is all. and for $65, it wasnt much more than a much smaller xformer, and cheaper than dual ones!

edit:

i have some MUR860's or whatever those nice diodes are, could i use those instead of the 1N4005's?

steenoe · 26th May 2005, 08:00 PM

Quote:

could i use those instead of the 1N4005's?

Yep, you can. I am considering these Schottky's for the X-CCS-BosoZ I am gonna build: https://www.onsemi.com/pub/Collateral/MBR3100-D.PDF
Schottky's should be fairly noisefree

No snubbers needed

Steen

cowanrg · 26th May 2005, 08:43 PM

cool. ill have to see if i have enough of those to use for both boards... i think there are like 8 per board. not sure if i have that many.

now if i could just go home...

steenoe · 26th May 2005, 08:52 PM

Quote:

not sure if i have that many.

YGM

Steen

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26th May 2005, 06:39 PM	#11
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	of course 800va is overkill the idea behind it was that i couldnt find a readily available xformer in the voltage i needed in a smaller size. and i WAS planning on doing full dual mono (two xformers), but at the cost plitron and others wanted to charge for two, i could get the 800va for less money. so, i just went that route. plus, it adds a good amount of weight to the chassis making it feel more substantial.

26th May 2005, 06:41 PM	#12
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	another thing regarding the light bulb, does wattage matter? if there IS a short, will it blow, or will it just get really bright? i just want to know, if i HAVE a problem, do i have to worry about having another one

26th May 2005, 06:54 PM	#13
steenoe diyAudio Member Join Date: Mar 2004	RS Components has 2x55v toroids as of the shelf item. Maybe thats available in the states too? Here is the danish site: RS toroids You should be able to interpret the VA ratings and the voltages. They have sales places in the states too. Steen

26th May 2005, 06:57 PM	#14
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	i got the 800va for like $65. and i didnt have to track anything down. no phone calls, no emails, etc... i just clicked order, and it was there in a couple of days and it looks cool for a preamp.

26th May 2005, 07:13 PM	#16
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	Yes, connect the light bulb in seies with the hot wire. I would say 50W to 100W bulb should do. If there is a short somewhere, the bulb will light up very brightly but won't blow out the bulb.

26th May 2005, 07:49 PM	#17
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	yeah, ive got a diode tester in my meter. steenoe, exactly. i just wanted some weight to the thing is all. and for $65, it wasnt much more than a much smaller xformer, and cheaper than dual ones! edit: i have some MUR860's or whatever those nice diodes are, could i use those instead of the 1N4005's?

26th May 2005, 08:43 PM	#19
cowanrg diyAudio Member Join Date: Apr 2002 Location: Lafayette, CO	cool. ill have to see if i have enough of those to use for both boards... i think there are like 8 per board. not sure if i have that many. now if i could just go home...

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