In your first post you mention printing directly on copper. That may be useful for checking size of your board and components, but today it is very cheap to order professionally made boards from China. Prizes can be around 5€£$ and postage and handling costs often more. Check JLCPCB.
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Hello Thanks for the informations,
Yes I will see with JLCPCB, but I live in France and I don’t want to pay tax and duties, I have seen europacket,
Otherwise how can I export the gerber file please ? is predrill information are includ in the gerber file ?
When I export I have multiple file !? what can I do please ?
I thank you
FWIW, and a little late to the discussion. I feel the marked pads are too close together. Did you maintain the 0,254mm minimum clearance required by JLCPCB?
You export Gerber files from PCB editor. PCB editor/File/Fabrication outputs gives you files you need. Then pack them into a zip-file and send them to a PCB manufacturer.
when I want to export gerber file I have a menu who say :“do not cover vias”
What does it mean please ? have you got an exemple in picture ?
IT is not checked by default, must I checked it ?
I thank you
A few footprints seem unsuitable.
C62 = 22nF
C59 = 100nF
R40 = 1watt, which has the same footprint as the ½watt resistors. You need a larger footprint with larger holes in the pads.
R34 (to the right of the left hand valve ECC85?) has a very long footprint for a ½W resistor.
C66 is an axial 100µF electro. Are these readily available, or will you need to use a radial package?
The two pads attached to pins 4 & 5 of the ECC80 will have wires attached, I suppose. It would probably be better to place them further from the hot glass envelope.
For robustness and ease of soldering, I’d increase the size of the pads of the footprints with the small diameter… give all the resistors and capacitors the larger diameter pads.
Probably increase the diameters of the pads for the valves also. They get hot so a bit more solder should help reliability.
Agree with @straubm about the indicated pads.
Typically vias are covered by the silkscreen. They can be exposed by this option. Reasons are TLDR.
For hobbyist standard boards this option should/need not be selected.
You don’t have vias, so leave unticked.
Hello Thanks for all theses answer it’s nice 
I don’t use the cover vias.
In fact I create my circuit based on the original and took components that can be placed easily on the circuit
Yes C66 is an axial capacitor, yes The two pads attached to pins 4 & 5 of the ECC80 will have wires attached, it’s the case on the original circuit, the wire will be connected to pin number 39.
the problem is the size o f the circuit I muse give the same as the original replace by the new. 85mmx110mm
That’s why I can not choose a better place…but the original amplifier is not really hot after some hour I can touch the circuit without problem of otherheat
This I understood. My comments didn’t require changing the size of the board, just improving what was there.
Eg. The 1W resistor won’t fit flat on the board and the holes in the pads for that component will probably be too small for the leads.
The original PCB has much larger and more robust pads for all the components.
Sure it will be better but I’m beginner 
this is what I modify,
Otherwise I have a problem the board is too big , JLCPCB say :Detected 2 layer board of 190.01x277mm(7.48x10.91 inches) .
I also see in the gerber file viewer of the website there is no holes in the pcb !? it’ is not normal
I must have a final pcb board with theses dimensions :85mm x 110mm.
What can I do please ?
I’m a bit confused re how you got to 190mm but, that’s not important to me because, if I were doing this project, I’d start afresh by:
• Reviewing the Schematic/etc in the manual and any physical board, mounting…etc you have
• Understand the circuit such as to know what the Physical Constraints are with respect to how the PCB fits in the box and mounts. Understand these such that you know what the ‘Keep-Out’ zone is
• Create a New Project and the first thing to do is make the Schematic. But, if not wanting to make schematic and you correctly understand the Circuit, then start by making the PCB shape of 85x110
• Place the components and some traces. Then, play around with Moving them around to get good feel for this important experience of designing/laying-out a PCB
• If something doesn’t fit, then Move/Rearrange as necessary
The important thing is to have circuit work, not to reproduce what may be a lesser-than-optimal PCB that was designed decades ago…
Thanks for the advices,
I think I will try to make a new one…
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