I finished mine few days ago, sounds WONDERFUL.
But it still doesnt fit
and im on my way to make it even smaller so...
Sorry but I dont have pics to show of my new amp...
44mm in height 250mm deep and 410mm wide dual mono...
But can anyone tell me, why theres those 1uF capacitors between signal GND and emmiters?
Who ever uses Eagle PCB software must be a genius
But it still doesnt fit
and im on my way to make it even smaller so...Sorry but I dont have pics to show of my new amp...
44mm in height 250mm deep and 410mm wide dual mono...
But can anyone tell me, why theres those 1uF capacitors between signal GND and emmiters?
Who ever uses Eagle PCB software must be a genius
Nope...I did it in SprintLay6. I tried Eagle and Design Spark before but I find them to be time consuming but perhaps I was not so good in program language
. I like direct approach drawing and has found Sprint to be the ideal CAD. v1.4 means I have drawn a single lay-out in four configuration quite fast to do it in Sprint
But it still doesnt fit
Mihkus, if you still wanted to do it smaller, make all resistors in vertical position.
Hope it helps.
Cheers!
Thanks Shaan!..but the first and original remains yours forever!I see... Nice and pro looking layout.
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Beautiful work wiljj78,waiting for pdf
Thimios.
Thanks.. Yes i will share the pdf once its tested, my previous version was very tight and i'm not comfortable with floating VAS heatsink, in version 2 i feel much comfortable with 2 pairs, any suggestions are welcome.
Attachments
Hi Shaan,if i remember well Lazy cat recommendation is to omit these 1n4007 and 10R
What is your opinion about this?
Best regards.
Thimios.
Attachments
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Hi thimios,
really nice layout. I don't the diode/10R bypass on VSSA and it was benefical. I did the same thing on versatil (VSSA front end + BJT output) and after suppressing input cap it has also same effect. WHen suppresion input cap you will gain in clarity and sound stage and when suppress or bypass diode/10R you gain in lower frequency range...
Marc
Hi thimios. My opinion is no need to omit these parts as long as the on board filter caps that connect to the bus after the diode/resistor network are sufficiently large. 470uF is a good value and works magic to keep the front and vas stage free from PS hum and noise.
Hi shaan,
Have you test it? I don't it as many as suggested by LC himself. Despite the huge cap decoupling (1000uf for front and 1000uf for output on each rail) the effect was quite clear on bottom end présentation. I suggest you to test this mod. Same on versatil.
Marc
Hi idefixes,this is Willj pcb not mine!
I will test this in PMI ver. soon.
Thanks for reply.
Thimios.
Hi Idefixes. Please don't think I express my opinion without testing.
What I found is that the 'improvements' that some people swear they 'achieve' by omiting the said components just don't exist for this amplifier.
This might be an isolated case though. You should never believe anything and you will reach your truth.
Happy listening.
shaan
What I found is that the 'improvements' that some people swear they 'achieve' by omiting the said components just don't exist for this amplifier.
This might be an isolated case though. You should never believe anything and you will reach your truth.
Happy listening.
shaan
Hi Shaan ,i have the PMI ver.Hi thimios. My opinion is no need to omit these parts as long as the on board filter caps that connect to the bus after the diode/resistor network are sufficiently large. 470uF is a good value and works magic to keep the front and vas stage free from PS hum and noise.
I believe that low frequencies are a little down.
I will try to omit these 1n4007 ,10R compination and i report again.
Thanks for all your job.
Thimios.
Hi Idefixes. Please don't think I express my opinion without testing.
What I found is that the 'improvements' that some people swear they 'achieve' by omiting the said components just don't exist for this amplifier.
This might be an isolated case though. You should never believe anything and you will reach your truth.
Happy listening.
shaan
Do you think this difference lay to presence of lack of CCS at input stage as this one major distinction between Peeceebee and VSSA?
I have PMI board and will try it later but these are the latest version not reported in this thread they have input CCS on it so not so more a Peeceebee state profile (no CSS, single layer.....)
Marc
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Here is my attempt in PMI ver.http://www.diyaudio.com/forums/solid-state/244903-vssa-through-hole-pcb-build-thread-35.html
I want to try the Peeceebee ver.without CCS.
I want to try the Peeceebee ver.without CCS.
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PeeCeeBee is a simple
derivative of VSSA. I chose to omit those accessories because the amplifier works well without them.
I have no problem with that. I respect Pete and others who post the more complex designs in their own threads and help keep this thread focused only on the original PeeCeeBee. If they call their boards peeceebee, then its something I can only be happy and grateful for.
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