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Beginner PCB review request - RF Amp

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cadr:
Hello,

I was wondering if I could get some help reviewing my first PCB design.  Please find attached below.  (Post edited to include PNG versions of the schematic/board layout so you don't have to download the pdf)

I am trying to design one based on W7ZOI's Bidirectional Termination Insensitive Amplifier (pdf here: http://w7zoi.net/bidirectional_matched_amplifier.pdf). While I have been doing various amateur radio homebrew/general electronics off and on for a while, I've never designed a PCB. I wanted to order it from JLCPCB and have them assemble it as well, as it seems that if it is small and uses all "basic" parts, it is quite cheap per board.

I am planning on doing it single-sided. The large-ish pads on there are for soldering the wires to connect the parts or power the two parts of the amp. I usually build on copper clad board using little manhattan pads, and use short length of coax to connect them (sometimes I use BNC connectors, but wasn't going to here).

I'm going to use these below 14MHz (20M and below), hopefully as part of some BITX-like SSB.

Thanks in advance for any and all help!

phil from seattle:
A suggestion about asking for help - put the images inline rather than requiring me to down load them.  I've got enough clutter on my machine as it is so I generally don't bother if it requires a download (and subsequent scrub).

On the image you did put up, it shows a couple of silk screen labels on copper - you probably want to move them. I'm not sure what all board houses do with that but the ones I use don't print on copper.

T3sl4co1l:
No bottom side copper?  No stitching vias?

Quite generous space between components; which probably doesn't amount to much impact, as the bandwidth isn't going to be crazy or anything (with '3904s, 10s MHz?).

Tim

cadr:

--- Quote from: phil from seattle on May 30, 2021, 11:01:35 pm ---A suggestion about asking for help - put the images inline rather than requiring me to down load them.  I've got enough clutter on my machine as it is so I generally don't bother if it requires a download (and subsequent scrub).

--- End quote ---

Good call - I've updated my original post to include png versions. 


--- Quote from: phil from seattle on May 30, 2021, 11:01:35 pm ---On the image you did put up, it shows a couple of silk screen labels on copper - you probably want to move them. I'm not sure what all board houses do with that but the ones I use don't print on copper.

--- End quote ---

When you say "on copper", do you mean the exposed pads (such as where the "RSIGGND" text is going over the exposed copper) as opposed to going over unexposed traces (like where the "R18" text goes over an unexposed trace)?

cadr:

--- Quote from: T3sl4co1l on May 30, 2021, 11:35:06 pm ---No bottom side copper?  No stitching vias?

Quite generous space between components; which probably doesn't amount to much impact, as the bandwidth isn't going to be crazy or anything (with '3904s, 10s MHz?).

Tim

--- End quote ---

I mean, I could do a bottom side that was all copper and add stitching vias, I don't think that actually impacts the cost at all.  Is that a better practice?

Would you suggest I move the components closer together?  And any suggestions around the general component placement/trace width/etc?

Thanks!

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