The kit is fine..but Orcad, the thread opener had troubles with it
and he is now asking for a schematic to use 45 to 45 volts...so...he seems does not want to insist into the Velleman.
We are learning..for sure we are.
regards,
Carlos
and he is now asking for a schematic to use 45 to 45 volts...so...he seems does not want to insist into the Velleman.
We are learning..for sure we are.
regards,
Carlos
Hi carlos,
i am new to this forum. i started thread regarding one 60 watt ( may be between 60- 100 watt) highly stable , ultra low noise and distortion amplifier which i need for home use.
what you suggest for ?
i am new to this forum. i started thread regarding one 60 watt ( may be between 60- 100 watt) highly stable , ultra low noise and distortion amplifier which i need for home use.
what you suggest for ?
since I'm forced to use 45v + /-45v, plus I lost a lot of money for this card and I want to make another mistake
Orcad2010,
Build the amp as it is, it will work without a doubt. Even your 45V supply is okay. For anyone listening at music even close to an avergae 100 watt has rocks for a brain anyway. If you want to make absolutely sure that your speakers is not destroyed if for some reason the output transistors fail, then use an output capacitor of about 2200 uF/100V.
Nico
Build the amp as it is, it will work without a doubt. Even your 45V supply is okay. For anyone listening at music even close to an avergae 100 watt has rocks for a brain anyway. If you want to make absolutely sure that your speakers is not destroyed if for some reason the output transistors fail, then use an output capacitor of about 2200 uF/100V.
Nico
I do not find the MJL1302A and MJL3181 home providers, is that I can be replaced by 2SA1302, 2SA1553, 2SA1943
Hi Orcag2010.
your replies are very confusing. You now talk a bout MJL1302/3181 are you still talking about the Velleman kit, because this will not work in the Kit.
Nico
your replies are very confusing. You now talk a bout MJL1302/3181 are you still talking about the Velleman kit, because this will not work in the Kit.
Nico
It is clear to me he is unable to read the thread..language problems
as he is asking things already commented in this same thread..... i suppose he is unable....or worse..can be lazy or disturbed...i hope not.
In my point of view, he must make some effort, english is also not my native language and i could read all forum...and could write also hundreds of pages...we have google translator as a tool...awfull tool but helps to translate and to produce versions from our language to english and to translate from english to our language.... results not perfect, sometimes looks drunk guys talking ...but...we can communicate.
I made a lot for him...now it is time to Orcad to made an effort by himself.
bye folks
regards,
Carlos
as he is asking things already commented in this same thread..... i suppose he is unable....or worse..can be lazy or disturbed...i hope not.
In my point of view, he must make some effort, english is also not my native language and i could read all forum...and could write also hundreds of pages...we have google translator as a tool...awfull tool but helps to translate and to produce versions from our language to english and to translate from english to our language.... results not perfect, sometimes looks drunk guys talking ...but...we can communicate.
I made a lot for him...now it is time to Orcad to made an effort by himself.
bye folks
regards,
Carlos
Once again Orcad... transistors are transistors and nothing else than transistors
They all have base, colector and emitter.
They have gain
They have maximum current
They have maximum specified dissipation power
There's the maximum voltage they can hold
There's the frequency were you may have losses (-3dB)
They may look different, but they are almost the same..the power ones use to hold 8 to 15 amperes..some of them much more.... now a days, modern ones can work facing 200 volts and more... modern ones can dissipate 100 watts or more...so.... use the one you HAVE, the one you WANT, the one is AVAILABLE at your place..the one is CHEAPER...the NICEST one.... use the one you can have.
Transistors does not sound..there are not "big magic" on them...the one you use will be good...audio is low frequency...those ones, the worse transistor made now a days, can work in frequencies higher than the audio frequencies..so...no worries about replacement or substitution... they have no FAMILY, so, you do not need to use all Fairchild units...they have no RACE..so you do not need to use all them black..you can use some metalic ones together gray units...no problems.
This one you told..for sure it will be good...it is a transistor Orcad!... read the things we have posted to you..... copy the text, open google, click on language tools...set english translation to your native language ..paste the text into the place you have to do that and read..i hope your language is included there.
regards,
Carlos
They all have base, colector and emitter.
They have gain
They have maximum current
They have maximum specified dissipation power
There's the maximum voltage they can hold
There's the frequency were you may have losses (-3dB)
They may look different, but they are almost the same..the power ones use to hold 8 to 15 amperes..some of them much more.... now a days, modern ones can work facing 200 volts and more... modern ones can dissipate 100 watts or more...so.... use the one you HAVE, the one you WANT, the one is AVAILABLE at your place..the one is CHEAPER...the NICEST one.... use the one you can have.
Transistors does not sound..there are not "big magic" on them...the one you use will be good...audio is low frequency...those ones, the worse transistor made now a days, can work in frequencies higher than the audio frequencies..so...no worries about replacement or substitution... they have no FAMILY, so, you do not need to use all Fairchild units...they have no RACE..so you do not need to use all them black..you can use some metalic ones together gray units...no problems.
This one you told..for sure it will be good...it is a transistor Orcad!... read the things we have posted to you..... copy the text, open google, click on language tools...set english translation to your native language ..paste the text into the place you have to do that and read..i hope your language is included there.
regards,
Carlos
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Well Orcad...produce a list of the ones are available and i will point the ones you
can use (probably all them)
regards,
Carlos
can use (probably all them)
regards,
Carlos
Carlos,
I agree with your statement completely, ORCAD seems to be confused and his postings are even more confusing, maybe we are confusing him with too many replies. We should only answer YES or NO and not explaining things.
Orcad2010,
Please post the circuit that you have chosen and we will take it from there. If you keep confusing us then you may find that we lose interest in the thread.
As I mentioned before, you have spent the money on Velleman, why not just build it and see how it performs. It may be good enough for your purpose. Remember Mr Velleman sold a lot of these kits, they cannot all be bad.
Nico
I agree with your statement completely, ORCAD seems to be confused and his postings are even more confusing, maybe we are confusing him with too many replies. We should only answer YES or NO and not explaining things.
Orcad2010,
Please post the circuit that you have chosen and we will take it from there. If you keep confusing us then you may find that we lose interest in the thread.
As I mentioned before, you have spent the money on Velleman, why not just build it and see how it performs. It may be good enough for your purpose. Remember Mr Velleman sold a lot of these kits, they cannot all be bad.
Nico
By the way folks..you gonna be very welcome to Rio de Janeiro in 2016
We love strangers....i would like to see all of you there!
This is South View... Ipanema, Leblon and Gávea...the dog's face hill appear at the bottom...there are things written into that dog's face neck... about Viking navigator that was dead in these waters.
regards,
Carlos
We love strangers....i would like to see all of you there!
This is South View... Ipanema, Leblon and Gávea...the dog's face hill appear at the bottom...there are things written into that dog's face neck... about Viking navigator that was dead in these waters.
regards,
Carlos
Attachments
The list is enormous Orcad..i will spend whole week writing
Post the power ones you have, available at you country..and read our posts Orcad..be attention please.
Last chance man..sorry but you seem not to read..and this turns a monologue, not a dialogue.
regards,
Carlos
Post the power ones you have, available at you country..and read our posts Orcad..be attention please.
Last chance man..sorry but you seem not to read..and this turns a monologue, not a dialogue.
regards,
Carlos
Dx amplifier are here...waiting for you!
http://users.tpg.com.au/users/gerskine/dxamp/
Advertising Dx Corporation number 02-33.ioem48577473488... Marketing Division... and customer assistance staff.
http://www.youtube.com/watch?v=USsZ2xMC0R8
regards,
Carlos
http://users.tpg.com.au/users/gerskine/dxamp/
Advertising Dx Corporation number 02-33.ioem48577473488... Marketing Division... and customer assistance staff.
http://www.youtube.com/watch?v=USsZ2xMC0R8
regards,
Carlos
Hi Carlos,
I was just looking at your DX amp schematic. Nice!! Just wondering what the purpose of coupling capacitors C10 and C11 in that circuit. I'm thinking that is maybe to help correct for any residual DC offset at the output. I've yet to build an amp, so just curious.
I was just looking at your DX amp schematic. Nice!! Just wondering what the purpose of coupling capacitors C10 and C11 in that circuit. I'm thinking that is maybe to help correct for any residual DC offset at the output. I've yet to build an amp, so just curious.
C10 and C11 are standard in every (properly designed) power amp, they roll off the gain at DC to unity so that offsets are not amplified.
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