Need Bench Power. Please advise
- Thread starter quadwould
- Start date
Help Support GroupDIY Audio Forum:
[quote author="quadwould"]Jrmintz
what are the voltages it outputs?
cheers
-d[/quote]
There are 2 0-30 volt supplies @2A and and a 5 volt supply. I don't have it yet, so I'm not sure how to get bipolar voltage from it - I've never used a bench type supply before. I'm assuming I'll be able to do that.
:thumb:
what are the voltages it outputs?
cheers
-d[/quote]
There are 2 0-30 volt supplies @2A and and a 5 volt supply. I don't have it yet, so I'm not sure how to get bipolar voltage from it - I've never used a bench type supply before. I'm assuming I'll be able to do that.
:thumb:
[quote author="quadwould"]Not really sure why Bipolar is needed...... [/quote]
Much gear runs on bipolar power rails - API stuff runs on +/-12 to +/-20VDC. Anything with opamps, discrete or monolithic, needs a bipolar supply.
:guinness: :sam:
Much gear runs on bipolar power rails - API stuff runs on +/-12 to +/-20VDC. Anything with opamps, discrete or monolithic, needs a bipolar supply.
:guinness: :sam:
See.... i knew something about - DC would be obvious....
yes of course lots of power supply pbc have "+18V -18V, 0V, +48V" outputs labeled on the board, as do the main pcbs have the same sort of labels for their power inputs ....
I really need to go on holiday.... Pilot seaon not only burned me out, but made me brain-dead....
Well i suppose that means i have to look for 2 PSUs then... back to the researching ....
yes of course lots of power supply pbc have "+18V -18V, 0V, +48V" outputs labeled on the board, as do the main pcbs have the same sort of labels for their power inputs ....
I really need to go on holiday.... Pilot seaon not only burned me out, but made me brain-dead....
Well i suppose that means i have to look for 2 PSUs then... back to the researching ....
peterc
Well-known member
Remember a bench supply is really only for your bench... :sad: The point I'm making is that you only need more than 30v for phantom when making mic pres. I dont like testing mic pres with a phantom mic initially, so for that first switch on I use a 57 or the like.
So for 95% of projects a +- 30v supply will be just right.
The other point to bear in mind is that most phantom mics will run happily at 30v, so that could be used for phantom anyway in a bensh test .
I built myself a variable supply using rotary switches that gives me 0 to +-28v in steps & a separate fixed 48v supply. I've never got round to wiring up the 48v supply......
In my own experience, I've just never needed it on the bench.
Peter
So for 95% of projects a +- 30v supply will be just right.
The other point to bear in mind is that most phantom mics will run happily at 30v, so that could be used for phantom anyway in a bensh test .
I built myself a variable supply using rotary switches that gives me 0 to +-28v in steps & a separate fixed 48v supply. I've never got round to wiring up the 48v supply......
In my own experience, I've just never needed it on the bench.
Peter
Peterc,
you are a gentleman and a scholar!
you have been providing solid and consice information.
So with the following PSU would i be able to get "bipolar" a + and a - voltage of say 20V
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7514834915&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1
it looks like i could as the pos and neg posts are on either side of the ground/earth. so i would plud the dual banana into the Pos and Gnd of CH1 and into the Neg and Gnd of Ch2 and then track the 2 channels to have the same voltage. this is correct, right?
cheers
-d
you are a gentleman and a scholar!
you have been providing solid and consice information.
So with the following PSU would i be able to get "bipolar" a + and a - voltage of say 20V
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=7514834915&rd=1&sspagename=STRK%3AMEWA%3AIT&rd=1
it looks like i could as the pos and neg posts are on either side of the ground/earth. so i would plud the dual banana into the Pos and Gnd of CH1 and into the Neg and Gnd of Ch2 and then track the 2 channels to have the same voltage. this is correct, right?
cheers
-d
peterc
Well-known member
The site says that the outputs can be run in parallel, so I assume that you could get +20, 0, &-20 out of it.
Not exactly sure what the plugging would be, best to check the manual. Try here:
http://www.mastech.com.cn/html/english/cp/cp-12.asp#
Peter
Not exactly sure what the plugging would be, best to check the manual. Try here:
http://www.mastech.com.cn/html/english/cp/cp-12.asp#
Peter
