One can choose PCB and copper thickness but, using the same Gerber, what about the value of L1?
So, one can choose standard 1oz copper on 1.6mm PCB, and thicken the coil with tin to reduce its resistance?
Would it be worth reworking the 'Mask' layers to allow tin deposit on the widest tracks too?
Would it be worth reworking the 'Mask' layers to allow tin deposit on the widest tracks too?
Yes, this is in fact the scope of the inductor 'maskless' area, to allow tin deposit.
Some other few traces may benefit of this operation too. Design is open so you may modify as you wish.
Regards.
Tibi
Some other few traces may benefit of this operation too. Design is open so you may modify as you wish.
Regards.
Tibi
Thank you Tibi for answering my questions and also for sharing your design. That is very interesting 👍
Hello Tibi
greetings i have been reading this thread fr a long time
now i would like to build it is it possible to share latest
schematic for th single pair version.
warm regards
Andrew
greetings i have been reading this thread fr a long time
now i would like to build it is it possible to share latest
schematic for th single pair version.
warm regards
Andrew
Hello,
You can find the latest versions of Tibi files here:
https://github.com/tvicol/Q17-a-QUAD405-audiophile-approach
My files are here too.
https://github.com/stefaweb/Q17-a-QUAD405-audiophile-approach
Regards,
Steve.
You can find the latest versions of Tibi files here:
https://github.com/tvicol/Q17-a-QUAD405-audiophile-approach
My files are here too.
https://github.com/stefaweb/Q17-a-QUAD405-audiophile-approach
Regards,
Steve.
Andrew,
Follow the links in my very first post. You have links to order parts, pcb, trafo etc.
You may want to read Project description, there are all schematics.
Regards,
Tibi
Follow the links in my very first post. You have links to order parts, pcb, trafo etc.
You may want to read Project description, there are all schematics.
Regards,
Tibi
Working on another Q17 with exclusive parts ...
Regards,
Tibi
Regards,
Tibi
Last edited by a moderator:
You can replace Q9 and Q11 with ZETEX ZVP2106A.
https://www.ebay.fr/itm/181609632548
Already tested this seller. Sell real Zetex transistors.
Stef.
Hello,
I published a maintenance version 1.2.1 of the Q17-Mini on my GitHub repository.
There are not many changes (see CHANGELOG) but one useful thing, I added component Part Number column in Q17-Mini-BOM.html file (and diagram).
Enjoy!
Stef.
I published a maintenance version 1.2.1 of the Q17-Mini on my GitHub repository.
There are not many changes (see CHANGELOG) but one useful thing, I added component Part Number column in Q17-Mini-BOM.html file (and diagram).
Enjoy!
Stef.
Attachments
Hi, Is this still the case? It has never been changed in the scematic.... Stef uses 100R and I remember you mentionning something later on in this thread.
Regards.
Hello Tibi
greetings Please can you clarify the correct value
R29/R30 and 2SA970/2SC2240 i have the GR grade
can they be used.
warm regards
Andrew
greetings Please can you clarify the correct value
R29/R30 and 2SA970/2SC2240 i have the GR grade
can they be used.
warm regards
Andrew
R29 and R30 are 10ohm.
GR grade is low beta. 2SC2240GR grade can be used in place of Q7. Here a low beta is prefered.
2SA970GR can be used as well. Select highest beta you have.
Regards,
Tibi
GR grade is low beta. 2SC2240GR grade can be used in place of Q7. Here a low beta is prefered.
2SA970GR can be used as well. Select highest beta you have.
Regards,
Tibi
Hi!
If you have a plop in the speakers, you can reduce the value of R29/R30. It is however recommended (must) to use a DC protection circuit at ouput to protect (expensive) speakers and stay with 10K.
I will correct R29/R30 on my diagram.
Regards,
Stef.