hehehhe... enjoy and be happy folks.
Dx Blame Supercharged boards..... that can be used for the four models, are in the group buy...run and you will get the last ones...there's not too many to be sold anymore.... we have sold 90 boards... some more kits are available.
Yep... Ostripper had found something interesting..he is extremelly excited these days...next year i will know what he means with all that stuff.
regards,
Carlos
Dx Blame Supercharged boards..... that can be used for the four models, are in the group buy...run and you will get the last ones...there's not too many to be sold anymore.... we have sold 90 boards... some more kits are available.
Yep... Ostripper had found something interesting..he is extremelly excited these days...next year i will know what he means with all that stuff.
regards,
Carlos
I would like to ask friends, please, to make comments about the circuit
in the thread this idea is being explored.
Here is Dx Blame amplifiers, and this modifications was not tested and will not be implemented in my amplifiers this year.
Dx Blame is another amplifiers, try Ostripper threads for a while......next year i will make my tests but i do not suggest people to modify when i have not tested.
regards,
Carlos
in the thread this idea is being explored.
Here is Dx Blame amplifiers, and this modifications was not tested and will not be implemented in my amplifiers this year.
Dx Blame is another amplifiers, try Ostripper threads for a while......next year i will make my tests but i do not suggest people to modify when i have not tested.
regards,
Carlos
The numbers...
TMC greatly improve the THD ratios.
To reduce the level of H2 at high frequencies,, you must remove
the 100pf capacitor that is connected between base and collector
of the LTP current source transistor , and connect it from base
to positive rail.
You can increase its value to a few nF..
Hope that it will sound as expected....Have fun !
TMC greatly improve the THD ratios.
To reduce the level of H2 at high frequencies,, you must remove
the 100pf capacitor that is connected between base and collector
of the LTP current source transistor , and connect it from base
to positive rail.
You can increase its value to a few nF..
Hope that it will sound as expected....Have fun !
hi OS
I'm going to build dx blame es and supercharged version
I'm wondering can you draw a schematic for yr 300 watt blame with tmc?
many thanks in advance
I'm going to build dx blame es and supercharged version
I'm wondering can you draw a schematic for yr 300 watt blame with tmc?
many thanks in advance
I have put any differences aside...In fact , I have learned from your video's and threads.
You might find it funny , but your "Blame" series amp is quite likely the best there is ... both my ears and the simulator say so. The blame does this with 4 less transistors than my new "sym" (both are below).
The testers will be a whole club with hundreds of people. They will hear the (my) "blame" at 300 clear watts. They will also hear the new symasym at the same level on the same output board. You really should try TMC on your blame , it makes "near perfect" TOTALLY perfect. I did not add the cascode for fun , the TMC'ed blame's only weakness is the input pair noise (can only be seen on scope) , so I drastically reduced it (low noise SS9014 NPN pair + the cascode).
I was even taken back (astounded) by the ultra pure sound , especially with the "extra's" this will redefine what DIY can do.
OS
Uncle Carlos
Merry Christmas to you and your family.
I've put some component on my DX blame es and supercharged
Hopefully i can bring it to life before the new year
I'm curious can I use Sd 669 or Mje 340 ( i 've already had a couple of them) in vbe position because good old philips bd 139 is hard to find?
Mnay thanks for sharing the design
Merry Christmas to you and your family.
I've put some component on my DX blame es and supercharged
Hopefully i can bring it to life before the new year
I'm curious can I use Sd 669 or Mje 340 ( i 've already had a couple of them) in vbe position because good old philips bd 139 is hard to find?
Mnay thanks for sharing the design
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I have not listened...only simulated...i do think this can sound or not
I am not sure if this in inside our human threshold of perception...the reduction in distortion is very interesting...but can be just numbers too.
This depends on testing.
I am not including this circuit in my amplifiers before testings.... will do that with calm next year...let's wait the dust comes down... seems a miracle...but can be also something hard to perceive.
If this could produce a clear and known increase in sonics, i suppose the one had Baxandall letters would have published earlier....not this way when a long time have passed.... seems that may be only good numbers..... and we need to listen the advantage ...or will be something to make instruments happy...not humans happy.
You see the idea is old... and if was so revoluctionary the way we believe (faith) would have leakage several years ago..... i have some suspections, not sure, this may be just a play with numbers...you see the document from Baxandall was made using typewritter...and old style machine...so..this is very old..now a days we have not these machines.
I have some good hopes about.... you see OS. is really happy..... but i do not know his way to test things deeply.... and i have my way, that uses other guys to help me...blind A to B testing.
This method is old and deeply explored...two amplifiers...same amplifiers...one with a modification to be tested...other standard...both adjusted to the same output power and checked with dB meter...a single speaker, a good speaker.... and a switch to amplifier A and amplifier B.... you do not see amplifiers, so..... beauty will not matter to you.... you will listen music and an operator, switcher, switch operator will say A or B without modulate voice to help one or other.... operator does not know what amplifier is A and what amplifier is B.... audio program is variable, many styles..and switch is operated several times each music.... them you have the result..this is the test... a simplified explanation about..but this is the idea.... asking children, woman and men from several ranges or age.. to be the ones to evaluate...will result in good precision.
But all this has value to that peculiar, particular speaker and may not confirm with other speaker....reason why we tune speaker to our amplifiers to obtain the best result..a matched pair ....you know what i mean..
I have made fast simulation and i could find 0,000845% THD...and i think this can be even more reduced.
Wahab suggested a good modification in my CCS to the differential...this gonna be included in the next model....BUT...the TMC i really do not know.
Showing you but understand this is not tested...not approved and NOT INCLUDED into the Dx Blame line of amplifiers... at least for a while.
The resistance..... Baxandall used 68 ohms...simulating i found this one better (47 ohms).... this depends on the transistor too.
Beautifull boards dear Dexter...congratulations!
regards,
Carlos
I am not sure if this in inside our human threshold of perception...the reduction in distortion is very interesting...but can be just numbers too.
This depends on testing.
I am not including this circuit in my amplifiers before testings.... will do that with calm next year...let's wait the dust comes down... seems a miracle...but can be also something hard to perceive.
If this could produce a clear and known increase in sonics, i suppose the one had Baxandall letters would have published earlier....not this way when a long time have passed.... seems that may be only good numbers..... and we need to listen the advantage ...or will be something to make instruments happy...not humans happy.
You see the idea is old... and if was so revoluctionary the way we believe (faith) would have leakage several years ago..... i have some suspections, not sure, this may be just a play with numbers...you see the document from Baxandall was made using typewritter...and old style machine...so..this is very old..now a days we have not these machines.
I have some good hopes about.... you see OS. is really happy..... but i do not know his way to test things deeply.... and i have my way, that uses other guys to help me...blind A to B testing.
This method is old and deeply explored...two amplifiers...same amplifiers...one with a modification to be tested...other standard...both adjusted to the same output power and checked with dB meter...a single speaker, a good speaker.... and a switch to amplifier A and amplifier B.... you do not see amplifiers, so..... beauty will not matter to you.... you will listen music and an operator, switcher, switch operator will say A or B without modulate voice to help one or other.... operator does not know what amplifier is A and what amplifier is B.... audio program is variable, many styles..and switch is operated several times each music.... them you have the result..this is the test... a simplified explanation about..but this is the idea.... asking children, woman and men from several ranges or age.. to be the ones to evaluate...will result in good precision.
But all this has value to that peculiar, particular speaker and may not confirm with other speaker....reason why we tune speaker to our amplifiers to obtain the best result..a matched pair ....you know what i mean..
I have made fast simulation and i could find 0,000845% THD...and i think this can be even more reduced.
Wahab suggested a good modification in my CCS to the differential...this gonna be included in the next model....BUT...the TMC i really do not know.
Showing you but understand this is not tested...not approved and NOT INCLUDED into the Dx Blame line of amplifiers... at least for a while.
The resistance..... Baxandall used 68 ohms...simulating i found this one better (47 ohms).... this depends on the transistor too.
Beautifull boards dear Dexter...congratulations!
regards,
Carlos
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I am glad to say...also i am sad to say...the blue boards stock is depleted
We have not boards anymore.... the last one that have asked in the group buy and also A.Wayne will have their boards...but sadly we cannot feed your needs.
I thank you by your preference...and the existance of non existance of the second round will depend on your interest...so...if you want these boards....let us know...post the information you are candidate to a second group buy and them we will run a second group buy in the future.... 100 boards where sold to both DIY foruns...the Brazilian one (HT Forum) and this one we are now....both of them have group buys.
Sadly, some folks had problems...some of them travelled and have not ordered and we have no more..even dearest friends, alike Joseph Siejack (Evette), will not have blue boards ...and this is a pitty that hurts my heart.
These boards are multi models...they can fit:
Dx Blame ES
Dx Blame ST
Dx Blame MKII (200 watts at 2.5 ohms)
Dx Blame MKII Supercharged (200 watts at 4 ohms)
Nice ones..they have values already printed over the board.... the silk screen guides you to assemble..only interchangeable parts, that depends on different models, have R1, C3 and so on printed... a chart help you to find the correct value depending your model choice.
The first three ones uses 35 volts supplies.... 160 to 200 watts supplies to the Dx Blame ES and ST ...or a single 400 watts supply can fit too.
To the Dx Blame MKII you gonna need a 350 watts transformer (400 is better) to each channel.
To the Dx Blame MKII Supercharged you gonna need, also, a 350-400 watts transformer to each channel, but the DC voltage is 55 volts...symetrical of course.
Transistors are the same types to all models.... to the small ones we are using 2N5401 and 2N5551...to mid power we are using:
MJE15028
MJE15029 or
MJE15030
MJE15031 or
MJE15032
MJE15033 or
MJE15034
MJE15035 or
2SC4792
2SA1837
To the power output, the better choice is MJL4302A and MJL4281A
But there are some others you can try...including the old and good 2SC5200 and 2SA1943
you can use others too, for instance:
MJL3281A and MJL1302A
MJW3281A and MJW1302A
2SC2922 and 2SA1216 (big old Sankens)
MJE15003 and MJE15004 (old TO-3)
FJA4210 and FJA4310
FJL4315 and FJL4215
2SC3284 and 2SA1303 (medium sized Sankens)
And hundreds or other ones that can face more than 100V from colector to emitter, that can face 10 amperes or more from colector to emitter....150 to 250 watts units.
The higher power units where tested with the suggested ones.....so, i do no know if other ones will survive..but for sure, all then where tested in the 100 watts models (Dx Blame ES and Dx Blame ST).
I do not like MJE340 and MJE350... they may fit..but use them under your own risk..i had oscilations with these folks several times...they are very difficult to work with them.
All options suggested where tested.
regards,
Carlos
We have not boards anymore.... the last one that have asked in the group buy and also A.Wayne will have their boards...but sadly we cannot feed your needs.
I thank you by your preference...and the existance of non existance of the second round will depend on your interest...so...if you want these boards....let us know...post the information you are candidate to a second group buy and them we will run a second group buy in the future.... 100 boards where sold to both DIY foruns...the Brazilian one (HT Forum) and this one we are now....both of them have group buys.
Sadly, some folks had problems...some of them travelled and have not ordered and we have no more..even dearest friends, alike Joseph Siejack (Evette), will not have blue boards ...and this is a pitty that hurts my heart.
These boards are multi models...they can fit:
Dx Blame ES
Dx Blame ST
Dx Blame MKII (200 watts at 2.5 ohms)
Dx Blame MKII Supercharged (200 watts at 4 ohms)
Nice ones..they have values already printed over the board.... the silk screen guides you to assemble..only interchangeable parts, that depends on different models, have R1, C3 and so on printed... a chart help you to find the correct value depending your model choice.
The first three ones uses 35 volts supplies.... 160 to 200 watts supplies to the Dx Blame ES and ST ...or a single 400 watts supply can fit too.
To the Dx Blame MKII you gonna need a 350 watts transformer (400 is better) to each channel.
To the Dx Blame MKII Supercharged you gonna need, also, a 350-400 watts transformer to each channel, but the DC voltage is 55 volts...symetrical of course.
Transistors are the same types to all models.... to the small ones we are using 2N5401 and 2N5551...to mid power we are using:
MJE15028
MJE15029 or
MJE15030
MJE15031 or
MJE15032
MJE15033 or
MJE15034
MJE15035 or
2SC4792
2SA1837
To the power output, the better choice is MJL4302A and MJL4281A
But there are some others you can try...including the old and good 2SC5200 and 2SA1943
you can use others too, for instance:
MJL3281A and MJL1302A
MJW3281A and MJW1302A
2SC2922 and 2SA1216 (big old Sankens)
MJE15003 and MJE15004 (old TO-3)
FJA4210 and FJA4310
FJL4315 and FJL4215
2SC3284 and 2SA1303 (medium sized Sankens)
And hundreds or other ones that can face more than 100V from colector to emitter, that can face 10 amperes or more from colector to emitter....150 to 250 watts units.
The higher power units where tested with the suggested ones.....so, i do no know if other ones will survive..but for sure, all then where tested in the 100 watts models (Dx Blame ES and Dx Blame ST).
I do not like MJE340 and MJE350... they may fit..but use them under your own risk..i had oscilations with these folks several times...they are very difficult to work with them.
All options suggested where tested.
regards,
Carlos
Attachments
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Sure that the lower the resistor, to a certain point,
the lower the thd, but very low values such as these ones
are not safe for stability behaviour..
680R should be a cautious minima...
Yes Wahab..you are really good.
I am uploading tests about TMC...i have installed.... two hours more i will post link to two small videos.
I have made your suggested modification...several nanafarads from Differential CCS base to positive line..worked fine..thank you...i have to check sonics to use it in the next model.
Also i have tried 47 ohms, 56 ohms, 68 ohms, 82 ohms, 100 ohms...and oscilated...you are rigth.... real value i have found good is 1K.
You will listen the sound...to me it is clear that having TMC i had losses in treble..and some compression expansion effect alike Telefunken ancient Compander called High Com.
Not approved for a while..... by me to be included in the Dx line of amplifiers....i felt worse sonics.
BUT!... i would not be happy approving that...so....maybe i am being unfair... reason why i will invite people to help me to evaluate this next year...women, men, children, both sex, old folks...all them collected in the surrounding....and with different music styles i will perform a decent A to B blind testing...then we gonna see.
I think you will perceive the sonics in the recording...of course i have changed speakers from position to see if the effect changes....no way...left channel, having TMC, is clearly sounding worse..with less treble than the rigth channel..amplifiers absolutelly the same...same supply, same transistors, adjustment the same..same speaker sonics, same speaker model and same ears..... in the recording you may notice..do not know because i am still editing, then i will convert videos and then i will upload them to Youtube and this will take 2 hours of work.
Soon you gonna see this here...
Thank you Wahab....you are really good...i have to apologize because of past ironic conversation i had with you....i think i was unfair....you are really good and deserves all my respect.
regards,
Carlos
I am uploading tests about TMC...i have installed.... two hours more i will post link to two small videos.
I have made your suggested modification...several nanafarads from Differential CCS base to positive line..worked fine..thank you...i have to check sonics to use it in the next model.
Also i have tried 47 ohms, 56 ohms, 68 ohms, 82 ohms, 100 ohms...and oscilated...you are rigth.... real value i have found good is 1K.
You will listen the sound...to me it is clear that having TMC i had losses in treble..and some compression expansion effect alike Telefunken ancient Compander called High Com.
Not approved for a while..... by me to be included in the Dx line of amplifiers....i felt worse sonics.
BUT!... i would not be happy approving that...so....maybe i am being unfair... reason why i will invite people to help me to evaluate this next year...women, men, children, both sex, old folks...all them collected in the surrounding....and with different music styles i will perform a decent A to B blind testing...then we gonna see.
I think you will perceive the sonics in the recording...of course i have changed speakers from position to see if the effect changes....no way...left channel, having TMC, is clearly sounding worse..with less treble than the rigth channel..amplifiers absolutelly the same...same supply, same transistors, adjustment the same..same speaker sonics, same speaker model and same ears..... in the recording you may notice..do not know because i am still editing, then i will convert videos and then i will upload them to Youtube and this will take 2 hours of work.
Soon you gonna see this here...
Thank you Wahab....you are really good...i have to apologize because of past ironic conversation i had with you....i think i was unfair....you are really good and deserves all my respect.
regards,
Carlos
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Well... go to the group buy and try to see if Mitchel will sell you his own boards.
He told me "no more boards to sell".... mine ones gone to my family...so...sadly... they are finished..... but go to the group buy and post there...this may result in second round if several folks go there to ask for boards.
regards,
Carlos
He told me "no more boards to sell".... mine ones gone to my family...so...sadly... they are finished..... but go to the group buy and post there...this may result in second round if several folks go there to ask for boards.
regards,
Carlos
You are very welcome man!... i hope you get boards Tweakk
Here you have the TMC used together Dx Blame ST...... wait the second part where you have listening test:
http://www.youtube.com/watch?v=m83ByUJXTfc
regards,
Carlos
Here you have the TMC used together Dx Blame ST...... wait the second part where you have listening test:
http://www.youtube.com/watch?v=m83ByUJXTfc
regards,
Carlos
TMC bot aproved to be used together Dx amplifiers
At least for a while...we gonna see next year with further testings:
http://www.youtube.com/watch?v=m83ByUJXTfc
YouTube - TMC test together Dx Blame ST - part 2
regards,
Carlos
At least for a while...we gonna see next year with further testings:
http://www.youtube.com/watch?v=m83ByUJXTfc
YouTube - TMC test together Dx Blame ST - part 2
regards,
Carlos
I thought there would be only a tiny tiny difference between Standard ST and TMC ST like between the ES/ST (Hard to tell at all). Your videos showed an absolutely huge difference!! The TMC modified version is definitely inferior compared to the standard that is for sure. I wish when people say they have made the amp better by way of modifications that they actually test it side by side by means of using a switch box or left/right channels as you have so they can listen on the run. It seems these people are testing in the virtual world and because it has better distortion figures in the computer simulations then it must sound better. This is only the human brain telling you so because you think it should..haha.
Please people before giving a comparison and opinion to actually do some side by side tests (blind tests). Use same power/volume levels and switch on the run between the amps. Even if you connect an amp 1 at a time it may take a few minutes and by the time you listen to the second one you will forget what the first one sounds like. Give some evidence of the better sound such as a video as Carlos has done. Graphs of distorion levels are nice, but what do the ears say.
Who cares which amp has a better distortion level. Which amp sounds the best to your ears is what counts. My personal experience so far between three amps I have built is that the Blame ST is the BEST. The ST and ES have so small a difference when listening it is too small to make a judgement to which is better. However, under clipping tests I have found the ES to have 45w at 8ohms and the ST has 62W at 8ohm it is only for this reason that the ST in my opinion is slightly better.
Carlos good luck trying to make your amp even better, it seems like it may be an impossible task but I am sure you will have fun trying.
PS: I was going to send this reply yesterday but have just had 24hr electricity blackout because of a mini cyclone.
Regards
Niss_man
Please people before giving a comparison and opinion to actually do some side by side tests (blind tests). Use same power/volume levels and switch on the run between the amps. Even if you connect an amp 1 at a time it may take a few minutes and by the time you listen to the second one you will forget what the first one sounds like. Give some evidence of the better sound such as a video as Carlos has done. Graphs of distorion levels are nice, but what do the ears say.
Who cares which amp has a better distortion level. Which amp sounds the best to your ears is what counts. My personal experience so far between three amps I have built is that the Blame ST is the BEST. The ST and ES have so small a difference when listening it is too small to make a judgement to which is better. However, under clipping tests I have found the ES to have 45w at 8ohms and the ST has 62W at 8ohm it is only for this reason that the ST in my opinion is slightly better.
Carlos good luck trying to make your amp even better, it seems like it may be an impossible task but I am sure you will have fun trying.
PS: I was going to send this reply yesterday but have just had 24hr electricity blackout because of a mini cyclone.
Regards
Niss_man
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Yep.... offering us samples will be better to support the idea
In the reality, dear Niss-man, there is a possibility, a chance, that other values may produce a difference...in my mind the difference will be always worse...but...the ones wants to support TMC (hope they have to be discovering the miracle tool...in this case a sub circuit) will say, certainly, that i did not used the correct value....of course.
Well... and this argument is unbeatable.... someone may say if i use 112.34249485 picofarads in series with 136.847573 picofarads with the center tap resistance of 641.9684574 that will make the miracle comes true...i really do not believe and will not try the modification anymore, UNLESS someone produce video with proves the TMC sounds better.
Observe these capacitors in series...multiply the values and then divide the result by these capacitors added and you gonna see the resultant value is around the original value (100pf plus and minus 20 percent).
Well...i do had some hopes too...and you see i made tests to be sure the miracle could be done...... sadly was not truth.... because all of us wants the best possible sonics.
Gladly was not truth too because my boards have not room for that purpose.... imagine these guys that have just bouth new blue boards in our group buy..how they would be feeling if i perceive we had to implement that modification?....for sure they would not be happy... so.... in that moment was gladly, not sadly.
I am ready to help the ones wants to provide us audio tests informing them the software (freeware) i use to produce videos, to edit videos, to transcode videos e and the tips and tricks hot to upload fast to youtube and so on... because to produce these things are not a very easy task...there are some tricks.
Never fear..uncle Charlie is here!
regards,
Carlos
In the reality, dear Niss-man, there is a possibility, a chance, that other values may produce a difference...in my mind the difference will be always worse...but...the ones wants to support TMC (hope they have to be discovering the miracle tool...in this case a sub circuit) will say, certainly, that i did not used the correct value....of course.
Well... and this argument is unbeatable.... someone may say if i use 112.34249485 picofarads in series with 136.847573 picofarads with the center tap resistance of 641.9684574 that will make the miracle comes true...i really do not believe and will not try the modification anymore, UNLESS someone produce video with proves the TMC sounds better.
Observe these capacitors in series...multiply the values and then divide the result by these capacitors added and you gonna see the resultant value is around the original value (100pf plus and minus 20 percent).
Well...i do had some hopes too...and you see i made tests to be sure the miracle could be done...... sadly was not truth.... because all of us wants the best possible sonics.
Gladly was not truth too because my boards have not room for that purpose.... imagine these guys that have just bouth new blue boards in our group buy..how they would be feeling if i perceive we had to implement that modification?....for sure they would not be happy... so.... in that moment was gladly, not sadly.
I am ready to help the ones wants to provide us audio tests informing them the software (freeware) i use to produce videos, to edit videos, to transcode videos e and the tips and tricks hot to upload fast to youtube and so on... because to produce these things are not a very easy task...there are some tricks.
Never fear..uncle Charlie is here!
regards,
Carlos
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