I can ask Mitchel the software files he have.... we could not
have gerbers till now.... problems with Mitchel computer i think...but if you want, i can send you PC CAD2006 files, then your work will become easier.
I have to ask this to Mitchel, of course, but i do think he will agree.
About Red and Gold boards or MKII boards...well... they sound almost the same in my ears... and all them are Dx Blame amplifiers...so....beeing red or blue does not matter to me.... this depends on folks interests.
MKII has more power, and the circuit is almost the same with some tweaks that increased input impedance and some new transistors to face higher voltage.
I do think, to keep the red and gold boards as an excelent option is a very good idea...but for sure, let people decide what they want.
regards,
Carlos
have gerbers till now.... problems with Mitchel computer i think...but if you want, i can send you PC CAD2006 files, then your work will become easier.
I have to ask this to Mitchel, of course, but i do think he will agree.
About Red and Gold boards or MKII boards...well... they sound almost the same in my ears... and all them are Dx Blame amplifiers...so....beeing red or blue does not matter to me.... this depends on folks interests.
MKII has more power, and the circuit is almost the same with some tweaks that increased input impedance and some new transistors to face higher voltage.
I do think, to keep the red and gold boards as an excelent option is a very good idea...but for sure, let people decide what they want.
regards,
Carlos
Rudi - I got some of the boards from the first GB you ran. Very impressive. I'm definitely interested in the 3rd Round. I vote for the PSU imbeded in the board - but, it's not essential. I'm also interested in getting more details on the Pre Amp / Attenuator you mention in post 214.
I am also very interested in the DX Blame Amplifier...and like the idea of the Psu on the same board as Amp 🙂
Does anyone know or have a rough idea how much all parts for this build comes to?
Thanks
Alon
Does anyone know or have a rough idea how much all parts for this build comes to?
Thanks
Alon
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Hello Malka07,
let us assume that you go for the biggest version, the Blame MKII Supercharged, and you want to set it up as dual-mono blocks.
Then you need:
2 x Transformers rated at about 300 Watt each = 80€
2 x PCBs =30€
4 pairs of MJL4302 / MJL4281 output transistors = 40€
4 big powercaps = 24€
Resistors, small caps, small transistors, ... = 30€
Sum it up yourself, please.
But this isn't much compared to the power and the sound you will be offered.
Best regards - Rudi_Ratlos
P.S. Maybe I will offer a "small kit" in the forthcoming round, if you are interested.
It will consist of the PCBs, output transistors, MICAs, small parts, emitter resistors, caps, ...
If I buy 20 pcs. of each, the price will of course be significantly lower.
let us assume that you go for the biggest version, the Blame MKII Supercharged, and you want to set it up as dual-mono blocks.
Then you need:
2 x Transformers rated at about 300 Watt each = 80€
2 x PCBs =30€
4 pairs of MJL4302 / MJL4281 output transistors = 40€
4 big powercaps = 24€
Resistors, small caps, small transistors, ... = 30€
Sum it up yourself, please.
But this isn't much compared to the power and the sound you will be offered.
Best regards - Rudi_Ratlos
P.S. Maybe I will offer a "small kit" in the forthcoming round, if you are interested.
It will consist of the PCBs, output transistors, MICAs, small parts, emitter resistors, caps, ...
If I buy 20 pcs. of each, the price will of course be significantly lower.
Can you offer the "small parts" as a separate kit too?
And will this kit be compatible with the DX blame ES from the previous groupbuy?
As im in the netherlands, shipping costs from the US for a small order are quite high.
And will this kit be compatible with the DX blame ES from the previous groupbuy?
As im in the netherlands, shipping costs from the US for a small order are quite high.
a pair of chassis and a pair of heatsinks could easily double that amplifier cost and more likely to treble or quadruple the cost.
to buy a pair of chassis and a pair of heatsinks will certainly cost more than 204euros.
Now add on some hardware.
to buy a pair of chassis and a pair of heatsinks will certainly cost more than 204euros.
Now add on some hardware.
It depends, Andrew.
If you like to have a fashionable ALU case, you are right.
If you are content with a wooden enclosure and heatsinks, found at ebay:
you have to add 40€.
Best regards - Rudi_Ratlos
If you like to have a fashionable ALU case, you are right.
If you are content with a wooden enclosure and heatsinks, found at ebay:
An externally hosted image should be here but it was not working when we last tested it.
you have to add 40€.
Best regards - Rudi_Ratlos
Thank you very much Rudi, that's very helpful 🙂 If this group buy goes ahead then count me in, also I would be interested on the small parts kit.
Andrew I know what you mean about projects always being more expensive then accounted for!!! (tda1541a dac i just built cost me alot more then expected) But for me this is more a long term project, so I could always get the heatsinks and chassis near the end of build, when I have some more money!!
Alon
Andrew I know what you mean about projects always being more expensive then accounted for!!! (tda1541a dac i just built cost me alot more then expected) But for me this is more a long term project, so I could always get the heatsinks and chassis near the end of build, when I have some more money!!
Alon
I also decided to use a single case, a single transformer and a single heatsink
to reduce cost..this way i could build much more units spending the same money.
Performance is not so good as spending more money..for sure it is less...but money is something rare at my side...i need to save the money i have.
Here you see mine unit(s)... case came from Mitchel as he use this case to a gainclone system and he accepted to sell me three units.... cost is high..around 150 USD each one...it is heavy and not very well made..good design but problems in the paint, the metalic parts does not adjust perfectly...well...not very good... he usually does not sell these enclosures..he use to assemble amplifiers and he sell to Brasil these units fully assembled (gainclones inside).... of course i have not paid all this cost... we have made some agreement to reduce cost..some negotiations with transistors and these things.
Semprini is his brand name to the Gainclone.... i will erase this name from the panel...because now a days it is much more Semprex (Semprini plus Dx) than Semprini.
Very good that Rudi will provide some small kit of parts.
regards,
Carlos
to reduce cost..this way i could build much more units spending the same money.
Performance is not so good as spending more money..for sure it is less...but money is something rare at my side...i need to save the money i have.
Here you see mine unit(s)... case came from Mitchel as he use this case to a gainclone system and he accepted to sell me three units.... cost is high..around 150 USD each one...it is heavy and not very well made..good design but problems in the paint, the metalic parts does not adjust perfectly...well...not very good... he usually does not sell these enclosures..he use to assemble amplifiers and he sell to Brasil these units fully assembled (gainclones inside).... of course i have not paid all this cost... we have made some agreement to reduce cost..some negotiations with transistors and these things.
Semprini is his brand name to the Gainclone.... i will erase this name from the panel...because now a days it is much more Semprex (Semprini plus Dx) than Semprini.
Very good that Rudi will provide some small kit of parts.
regards,
Carlos
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Some sugestions:
-I would go with a different color for the board, for one good reason and one bad reason. The good reason is that I find red to be tiring to the eye when soldering. The bad reason is any red pcb reminds me of crappy chinese ebay stuff... Personnaly, I find green to be the most pleasing to work with.
-I wouldn't take the gold plating route, because of the problems of brittle joint if soldered improperly. But this is minor.
-Why not cutting off the board extension where the transistors are meant to be attached to the L-brackets? That way the transistors could be directly mounted to vertical heatsinks (like found on the Hifi2000 dissipante, see here: modushop.biz), which would be way simpler to assemble in my opinion, while still allowing short leads for the transistors.
-I would go with a different color for the board, for one good reason and one bad reason. The good reason is that I find red to be tiring to the eye when soldering. The bad reason is any red pcb reminds me of crappy chinese ebay stuff... Personnaly, I find green to be the most pleasing to work with.
-I wouldn't take the gold plating route, because of the problems of brittle joint if soldered improperly. But this is minor.
-Why not cutting off the board extension where the transistors are meant to be attached to the L-brackets? That way the transistors could be directly mounted to vertical heatsinks (like found on the Hifi2000 dissipante, see here: modushop.biz), which would be way simpler to assemble in my opinion, while still allowing short leads for the transistors.
I do love white boards with black silk screen..alike Technics did in the eigthies
In the reality, each one of us prefere a different colour...this is the way things are.
I do think red and gold boards are the best possible choice...but i agree that may be tiring to the eyes.
regards,
Carlos
In the reality, each one of us prefere a different colour...this is the way things are.
I do think red and gold boards are the best possible choice...but i agree that may be tiring to the eyes.
regards,
Carlos
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@ Rudi - Nice case Rudi. I would say a wooden case may look a lot classier than a typical ALU case.
Nice but how does the cooling work? The heatsinks should be vertical for best result.
I know, Per-Anders,
the circulation of the hot air in my case is somehow doubtful.
But since I did not have ALU - L-profiles at hand to install the heatsinks vertically, I just tried it this way, leaving the top open. It works.
Maybe, one day, I will craft a new wooden case.
@TeamACC: Do you know http: "//www.reichelt.de/" ?
This is the Online-shop, where I order normally.
Have a look at "Bauelemente" (Components).
Reichelt will ship your order to the Netherlands.
Best regards - Rudi_Ratlos
the circulation of the hot air in my case is somehow doubtful.
But since I did not have ALU - L-profiles at hand to install the heatsinks vertically, I just tried it this way, leaving the top open. It works.
Maybe, one day, I will craft a new wooden case.
@TeamACC: Do you know http: "//www.reichelt.de/" ?
This is the Online-shop, where I order normally.
Have a look at "Bauelemente" (Components).
Reichelt will ship your order to the Netherlands.
Best regards - Rudi_Ratlos
The little Pre-AMP
@Sandbasser,
much can be said about this little Pre-AMP / volume attenuator, but I won't do this in this thread.
Only so much:
I have built it and it works as designed.
I connected it to my DX BlameES prototype.
I know that Carlos warns against using a Pre-AMP in connection with his DX Blame.
But he does not know this Pre-AMP.
You can, for example, set up the "startup gain" from -85,5 dB to 21,5dB, default is 0dB.
The "startup-gain", that you set, will be stored in the µProcessor's flash-memory.
And it plays beautifully, meaning:
I am not aware (do not hear), that a Pre-AMP is installed between the source-input and the AMP.
I can control the selection of the sources' input, the mute function and the attenuation via an infrared remote device.
If Stephan decides to add a new functionality, you will be able to upgrade the on-board µProcessor's firmware by means
of an USB connection to your PC.
And it is to do-it-yourself.
What else do you need?
Best regards - Rudi _Ratlos
P.S. I forgot the price: about 100€ for PCBs, pre-programmed µProcessor, 2 transformers and all the components needed.
@Sandbasser,
much can be said about this little Pre-AMP / volume attenuator, but I won't do this in this thread.
Only so much:
I have built it and it works as designed.
I connected it to my DX BlameES prototype.
I know that Carlos warns against using a Pre-AMP in connection with his DX Blame.
But he does not know this Pre-AMP.
You can, for example, set up the "startup gain" from -85,5 dB to 21,5dB, default is 0dB.
The "startup-gain", that you set, will be stored in the µProcessor's flash-memory.
And it plays beautifully, meaning:
I am not aware (do not hear), that a Pre-AMP is installed between the source-input and the AMP.
I can control the selection of the sources' input, the mute function and the attenuation via an infrared remote device.
If Stephan decides to add a new functionality, you will be able to upgrade the on-board µProcessor's firmware by means
of an USB connection to your PC.
And it is to do-it-yourself.
What else do you need?
Best regards - Rudi _Ratlos
P.S. I forgot the price: about 100€ for PCBs, pre-programmed µProcessor, 2 transformers and all the components needed.
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Dear DX Blame friends,
I have been informed, that the PCBs have been etched by the etching company and dispatched by DHL today.
I will keep you informed.
Best regards - Rudi_Ratlos
I have been informed, that the PCBs have been etched by the etching company and dispatched by DHL today.
I will keep you informed.
Best regards - Rudi_Ratlos
The Postman Always Rings Twice
..., but I was busy working in my company's office, when the postman wanted to deliver the PCBs at my home-address.
I have taken a day off tomorrow.
I will complete your orders then and dispatch your letters at my local post-office tomorrow evening.
Best regards - Rudi_Ratlos
..., but I was busy working in my company's office, when the postman wanted to deliver the PCBs at my home-address.
An externally hosted image should be here but it was not working when we last tested it.
I have taken a day off tomorrow.
I will complete your orders then and dispatch your letters at my local post-office tomorrow evening.
Best regards - Rudi_Ratlos
Dear DX Blame friends,
I sent you the letters with the PCBs, that you have ordered, this afternoon.
I hope, they will all arrive safe and "in time" at your home.
I have now the time to go on with the layout of the PCB, that I will offer you in the 3rd round, and I will present it to you as soon as possible.
Best regards - Rudi_Ratlos
I sent you the letters with the PCBs, that you have ordered, this afternoon.
An externally hosted image should be here but it was not working when we last tested it.
I hope, they will all arrive safe and "in time" at your home.
I have now the time to go on with the layout of the PCB, that I will offer you in the 3rd round, and I will present it to you as soon as possible.
Best regards - Rudi_Ratlos
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