Github files have been updated for some time now.
Documentation was updated with operation description, alternative parts, construction etc.
Schematic and gerbers for 2 output pair is also available.
As I get more feedback from you, the documentation get better and for this:
A big Thank you !
Regards,
Tibi
Documentation was updated with operation description, alternative parts, construction etc.
Schematic and gerbers for 2 output pair is also available.
As I get more feedback from you, the documentation get better and for this:
A big Thank you !
Regards,
Tibi
Hi Tibi,
Just to confirm that the Q17 modules that you hope to provide the community will NOT fit into an existing 405 chassis.
Cheers,
David
Just to confirm that the Q17 modules that you hope to provide the community will NOT fit into an existing 405 chassis.
Cheers,
David
Hi David,
Q17 modules that I may offer in this GB will not fit existing 405's.
I have designed such modules, that fit perfectly in existing 405 chassis, but this was designed in Altium and can not be made open-source.
If there is enough interest I'll put in production such modules.
Enough interest mean over 100 ready mounted boards.
Regards,
Tibi
PS: My daughter is able to hear over 21kHz. No Joke. 🙂
Q17 modules that I may offer in this GB will not fit existing 405's.
I have designed such modules, that fit perfectly in existing 405 chassis, but this was designed in Altium and can not be made open-source.
If there is enough interest I'll put in production such modules.
Enough interest mean over 100 ready mounted boards.
Regards,
Tibi
PS: My daughter is able to hear over 21kHz. No Joke. 🙂
Thanks for the info Tibi. Best just stick to one Group Buy which is what you have going. If you ever make a prototype run of the WILL FIT type, let me know.
I unfortunately cannot hear to 21khz anymore but ultra sonic mosquito and rat "repellents" do irritate me....lol
I unfortunately cannot hear to 21khz anymore but ultra sonic mosquito and rat "repellents" do irritate me....lol
Q17 sound far better than existing 405 modules, but will take some time for people to realise this.
I'm 53 and still able to reach 13500Hz.
My daughter can hear clearly the bats and she described their sound like bells. She's also able to hear a buzz made by some electric cars which I'm not able to hear at all.
Regards,
Tibi.
I'm 53 and still able to reach 13500Hz.
My daughter can hear clearly the bats and she described their sound like bells. She's also able to hear a buzz made by some electric cars which I'm not able to hear at all.
Regards,
Tibi.
Thanks for the info Tibi. Best just stick to one Group Buy which is what you have going. If you ever make a prototype run of the WILL FIT type, let me know.
I unfortunately cannot hear to 21khz anymore but ultra sonic mosquito and rat "repellents" do irritate me....lol
Hi Ihear!
I am in my EIGHTIES, not talking about highest frequencies that can be heard, but enjoying the music, produced by Tibi's disign, very very much! Just saying....... So give it a try I would say, you will be payed off. I love sound since my seventeenth, especially music, s.a. classical, quires, voices and name your intruments. I think I am not freak, but all amps differ, some for the good, some for the bad.
But after 'some' years of experiance it is easier to distract the better ones.
Good luck!
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Member
Joined 2021
Please upload design file and Gerber filesHi David,
Q17 modules that I may offer in this GB will not fit existing 405's.
I have designed such modules, that fit perfectly in existing 405 chassis, but this was designed in Altium and can not be made open-source.
If there is enough interest I'll put in production such modules.
Enough interest mean over 100 ready mounted boards.
View attachment 1043455
Regards,
Tibi
PS: My daughter is able to hear over 21kHz. No Joke. 🙂
I fully agree. It is all about enjoying the music. I am 58 and got the hifi bug when I was in my early teens. Enlightenment only comes after years and countless $$ being spent on "sound". CheersHi Ihear!
I am in my EIGHTIES, not talking about highest frequencies that can be heard, but enjoying the music, produced by Tibi's disign, very very much! Just saying....... So give it a try I would say, you will be payed off. I love sound since my seventeenth, especially music, s.a. classical, quires, voices and name your intruments. I think I am not freak, but all amps differ, some for the good, some for the bad.
But after 'some' years of experiance it is easier to distract the better ones.
Good luck!
I have added column G to group buy list with the option for a blanc smd PCB.
This was designed as a direct replacement for existing QUAD405.
Regards,
Tibi
This was designed as a direct replacement for existing QUAD405.
Regards,
Tibi
Hello,
I plan to replace an original tube amplifier by a Q17 power amplifier, but my own speakers are not common resistive 8 ohm load. These are electrostatic US Martin-Logan CLS-II (Curvilinear Line Source) 4 ohm nominal impedance.
Impedance at high frequencies goes down, near 1.5 ohm...
I plan to replace an original tube amplifier by a Q17 power amplifier, but my own speakers are not common resistive 8 ohm load. These are electrostatic US Martin-Logan CLS-II (Curvilinear Line Source) 4 ohm nominal impedance.
Impedance at high frequencies goes down, near 1.5 ohm...
Trouble !
So, question is easy to formulate : do I need to update schematic, or insert something (as Zobel network, a classical simple protection used to prevent oscillations caused by inductive loads on LM3886 amps).
Answer id not so easy I think...
So, question is easy to formulate : do I need to update schematic, or insert something (as Zobel network, a classical simple protection used to prevent oscillations caused by inductive loads on LM3886 amps).
Answer id not so easy I think...
Member
Joined 2021
With power supply +/- 50Vdc, 1KHz, 700mV input , Q17 will deliver ~100Wrms in 8ohm.
Regards,
Tibi
Regards,
Tibi
I'm really interested in the SMD version. I was literally about to push the button on ordering a small batch of the THT boards from JLC PCB when I saw you had the SMD board tucked up your sleeve. But if the GB is any guide at the moment it doesn't look like the SMD version is ever going to get close to the 100 boards minimum.---
I have designed such modules, that fit perfectly in existing 405 chassis, but this was designed in Altium and can not be made open-source.
If there is enough interest I'll put in production such modules.
Enough interest mean over 100 ready mounted boards.
---
What's the problem with making the gerbers from the Altium project available to us? Is it copyright with Altium because you're using a 'personal use' version or something? Or copyright with the board itself?
I got this two-channel speaker protection board from Ebay. https://www.ebay.nl/itm/403273875050?hash=item5de4fefe6a:g:5lAAAOSw9c9iNABg
I found out that the speaker negative connections are tied together for both channels. I assume that will be a problem, or am I wrong?
Some wisdom needed.
Thanks
I found out that the speaker negative connections are tied together for both channels. I assume that will be a problem, or am I wrong?
Some wisdom needed.
Thanks
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Hello everyone,
After many weeks, I have now finished my latest version of the Q17.
What can I say, it was really worth it. The enclosure is very ideal for the amplifier, even though it has far too large cooling fins.
The transformer turned out small, only 200W, the big ones were sold out. It supplies 2x 30V ~.
What I find impressive is the precision of the amplifier, 38.5mV offset is set on both channels. Sonically it is also ultra accurate, exceptionally natural and with an unshakable quietness.
It is once again a difference from the first Q17.
Regards Tim
After many weeks, I have now finished my latest version of the Q17.
What can I say, it was really worth it. The enclosure is very ideal for the amplifier, even though it has far too large cooling fins.
The transformer turned out small, only 200W, the big ones were sold out. It supplies 2x 30V ~.
What I find impressive is the precision of the amplifier, 38.5mV offset is set on both channels. Sonically it is also ultra accurate, exceptionally natural and with an unshakable quietness.
It is once again a difference from the first Q17.
Regards Tim
Attachments
@StevenCrook
Making public my projects in Altium with my license is a mistake I'll never repeat.
@ed linssen
It must have separate grounds for each channel
@Tim1999de
I see some progress here !
Great work ! 👍
Regards,
Tibi
Making public my projects in Altium with my license is a mistake I'll never repeat.
@ed linssen
It must have separate grounds for each channel
@Tim1999de
I see some progress here !
Great work ! 👍
Regards,
Tibi
Ok, thanks to you, and so simple...Use Q17 with 2 output pairs and will drive your ML very well.
Regards,
Tibi
Alain, France
Good to know!@ed linssen
It must have separate grounds for each channel
I did send a conversation to you with my adress, last Monday, in relation to my question: "Are you willing/able to supply me with the needed 2cs2240/2sa970?" You asked me my adress.
Maybe you missed it?:
I can repeat it here:

Thanks Tibi
Last edited by a moderator:
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