First time designing a PCB - check my work?

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BluegrassDan

Well-known member
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Mar 17, 2009
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Elizabethton, TN
Hey guys,

This is the first PCB I've ever designed. Just curious to have my work checked.

Traces are 60 mil. 240V on B+, total heater current will never be more than 2.9A with four channels.
 

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I am a little concerned about the clearance between the heater traces and the first anode of the bottom tube. I think perhaps you should neck the tracks in this region.

Cheers

Ian
 
ruffrecords said:
I am a little concerned about the clearance between the heater traces and the first anode of the bottom tube. I think perhaps you should neck the tracks in this region.

Cheers

Ian

How narrow (mils) can I get away with? I thought about doing some more creative heater routing with vias if necessary.
 
BluegrassDan said:
How narrow (mils) can I get away with? I thought about doing some more creative heater routing with vias if necessary.

Well it is only 150mA of current. What width are they now?

Cheers

Ian
 
I am a little concerned about the clearance between the heater traces and the first anode of the bottom tube

+1, but I'm no expert.  Will you have a soldermask on the proto?

Edit: Adding a via would solve the squeeze; have one of them come from the other layer.
 
BluegrassDan said:
All the traces are 60 mil.

For signals. 20 mil is plenty. I think you can safely neck those heater traces to 30 mil where they pass between tube pins.

Not wishing to put a spanner in the works but when I have two  like yours sharing a heaters I usually place them on the baord with the heaters facing each other. The way you can have a pair of short fat traces directly between them.

Edit: So you would just need to rotate the bottom one through 180 degrees.

Cheers

Ian
 

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