Homemodder, Something new is going on here 😉 Kindly try one or more and provide feedback. Indulge me 🙂 Hypotheses go so far.
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Does this amplifier bring the ladies into the room ?
This amplifier has gotten a commendation regarding ladies voices. Whos next in posting their results ?
This amplifier has gotten a commendation regarding ladies voices. Whos next in posting their results ?
@Evette
@pinnocchio
Would you be in a position to attend this event and demo the SYMEF? Lets take Canada 😀
http://www.diyaudio.com/forums/club...uver-island-diyfest-2012-a-7.html#post3012136
@pinnocchio
Would you be in a position to attend this event and demo the SYMEF? Lets take Canada 😀
http://www.diyaudio.com/forums/club...uver-island-diyfest-2012-a-7.html#post3012136
Due to my condition it,s very dangerous for me to travel, i,m sorry i can,t make a trip that far safely. evette
I agree with homemodder, your amp's characteristics may find appeal find appeal with some listeners who prefer certain genres as our colleague mentioned - there are no vanilla designs that appeal to everyone all the time. Unfortunately that is life.
Nico, thank you for the support you gave at the beginning. I think going all the way will ease your suffering. Remember, there is still that dance 😉.
Lets watch the data come in and see whether we can draw a conclusion on the formula 😉
It is what it is.............if it fails.......well we learn something. If it proves to be more than magic beans...............we learn something too.🙂
Lets watch the data come in and see whether we can draw a conclusion on the formula 😉
It is what it is.............if it fails.......well we learn something. If it proves to be more than magic beans...............we learn something too.🙂
You see Nico, the wonderful volunteers who have constructed this amplifier and posted results are not to be taken lightly. I do not think they are easy to please. Their ages, tastes in music and equipment varies. Yet so far the formula has scored 100%
Thanks again Drowranger for your expertise in laying out a PCB in one plane and the massive amounts of effort on the PCB. etc etc
Thanks again Drowranger for your expertise in laying out a PCB in one plane and the massive amounts of effort on the PCB. etc etc
and also to you...
well this thread will not easily go down
.I'm still wondering why this amp. sounds better than optimos
well according to my taste. Optimos have a very clear highs and mids but symef have a very good mids in combination with lows with having a supply of 50v., while optimos, using supply of 72 volts.may be its the tripple output of Symef.
What really inspires me to make pcb is not most of R. Sloan amplifier have pcb layout and also I want to have a new layout of optimos using 85v.Yes I have done it using 4 pairs of lateral mosfet and surely it requires a massive heatsink.
I'm a big fan of R. Sloan and thought it is very hard to surpass his amplifiers.But SYMEF proved me wrong.Harrison is a brilliant engineer.As far as I know most of the amplifiers here fall in the category of class a, b, h,d and g.yes nothing new.
but what matters most is the techniques they have used to differentiate it from its class.
regards,
joel
well this thread will not easily go down


What really inspires me to make pcb is not most of R. Sloan amplifier have pcb layout and also I want to have a new layout of optimos using 85v.Yes I have done it using 4 pairs of lateral mosfet and surely it requires a massive heatsink.
I'm a big fan of R. Sloan and thought it is very hard to surpass his amplifiers.But SYMEF proved me wrong.Harrison is a brilliant engineer.As far as I know most of the amplifiers here fall in the category of class a, b, h,d and g.yes nothing new.

but what matters most is the techniques they have used to differentiate it from its class.

regards,
joel
I'm still wondering why this amp. sounds better than optimoswell according to my taste.
Why don't you ask Homemodder or OnAudio himself (its his survey). By the time you understand the answer you will be in another level 😀
have no basis...
first of all requires listenning test.they have to build first optimos and symef.Like I did.😀
regards,
joel
Why don't you ask Homemodder or OnAudio himself (its his survey). By the time you understand the answer you will be in another level 😀
first of all requires listenning test.they have to build first optimos and symef.Like I did.😀
regards,
joel
If you pay for travel I'll go 😉
Unfortunately, I do not have the funds for this right now... Montreal is in the east of Canada and Vancouver in the west...
Would have been nice!
Do
Unfortunately, I do not have the funds for this right now... Montreal is in the east of Canada and Vancouver in the west...
Would have been nice!
Do
@Evette
@pinnocchio
Would you be in a position to attend this event and demo the SYMEF? Lets take Canada 😀
http://www.diyaudio.com/forums/club...uver-island-diyfest-2012-a-7.html#post3012136
Any progress report ?
Delayed due to illness and hospital time. OK now, so ordering components.🙂
@pinnocchio
Thanks. If you cant go to em, make em come
We will have to do an inside job now 😀 .
Looking forward to your review
Thanks. If you cant go to em, make em come
We will have to do an inside job now 😀 .
Looking forward to your review
@ Alex,
Thanks Alex. The board takes an hour or two at most to stuff 😉 . Hoping to hear from you soon 😀
Thanks Alex. The board takes an hour or two at most to stuff 😉 . Hoping to hear from you soon 😀
Statistics
Over 60 boards were given out freely and are in circulation. Grab the remaining of this batch here http://www.diyaudio.com/forums/solid-state/212460-32-pcbs-available.html#post3020011
Over 60 boards were given out freely and are in circulation. Grab the remaining of this batch here http://www.diyaudio.com/forums/solid-state/212460-32-pcbs-available.html#post3020011
Heres suggested BOM
Amplifier
one of the parts can not be soused from DigiKey or Mouser
transistor 2N5401YTA is not readily available.
Can 2N5401G be used instead?
The difference is Frequency - Transition 300MHz vs 400MHz
Also what are the instructions on assembling this and setting the trim pot P1?
Thanks,
I
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